Interference between parasitoids (Hym.: Aphididae) and fungi (Entomophthorales) attacking cereal aphids.

Powell, W., Wilding, N., Brobyn, P. J. and Clark, S. J. 1986. Interference between parasitoids (Hym.: Aphididae) and fungi (Entomophthorales) attacking cereal aphids. Entomophaga. 31, pp. 293-302.

Related outputs

Characterisation of bird cherry-oat aphid (Rhopalosiphum padi L.) behaviour and aphid host preference in relation to partially resistant and susceptible wheat landraces

A - Papers appearing in refereed journals

Singh, B., Simon, A. L., Halsey, K., Kurup, S., Clark, S. J. and Aradottir, G. I. 2020. Characterisation of bird cherry-oat aphid (Rhopalosiphum padi L.) behaviour and aphid host preference in relation to partially resistant and susceptible wheat landraces. Annals of Applied Biology - AAB. 177 (2), pp. 184-194. https://doi.org/10.1111/aab.12616

Searching for wheat resistance to aphids and wheat bulb fly in the historical Watkins and Gediflux wheat collections

A - Papers appearing in refereed journals

Aradottir, G. I., Martin, J. L., Clark, S. J., Pickett, J. A. and Smart, L. E. 2017. Searching for wheat resistance to aphids and wheat bulb fly in the historical Watkins and Gediflux wheat collections. Annals of Applied Biology - AAB. 170 (2), pp. 179-188. https://doi.org/10.1111/aab.12326

Migratory flight behaviour of the pollen beetle Meligethes aeneus

A - Papers appearing in refereed journals

Mauchline, A. L., Cook, S. M., Powell, W., Chapman, J. W. and Osborne, J. L. 2017. Migratory flight behaviour of the pollen beetle Meligethes aeneus. Pest Management Science. 73 (6), pp. 1076-1082. https://doi.org/10.1002/ps.4550

Oilseed rape (Brassica napus) as a resource for farmland insect pollinators: quantifying floral traits in conventional varieties and breeding systems

A - Papers appearing in refereed journals

Carruthers, J. M., Cook, S. M., Wright, G. A., Osborne, J. L., Clark, S. J., Swain, J. L. and Haughton, A. J. 2017. Oilseed rape (Brassica napus) as a resource for farmland insect pollinators: quantifying floral traits in conventional varieties and breeding systems. GCB Bioenergy. 9 (8), pp. 1370-1379. https://doi.org/10.1111/gcbb.12438

Mass seasonal bioflows of high-flying insect migrants

A - Papers appearing in refereed journals

Hu, G., Lim, K. S., Horvitz, N., Clark, S. J., Reynolds, D. R., Sapir, N. and Chapman, J. W. 2016. Mass seasonal bioflows of high-flying insect migrants. Science - AAAS. 354 (6319), pp. 1584-1587. https://doi.org/10.1126/science.aah4379

Induced thiacloprid insensitivity in honeybees (Apis mellifera L.) is associated with up-regulation of detoxification genes

A - Papers appearing in refereed journals

Alptekin, S., Bass, C., Nicholls, C., Paine, M. J. I., Clark, S. J., Field, L. and Moores, G. D. 2016. Induced thiacloprid insensitivity in honeybees (Apis mellifera L.) is associated with up-regulation of detoxification genes. Insect Molecular Biology. 25 (2), pp. 171-180. https://doi.org/10.1111/imb.12211

Field evaluation of synthetic aphid sex pheromone in enhancing suppression of aphid abundance by their natural enemies

A - Papers appearing in refereed journals

Nakashima, Y., Ida, T. Y., Powell, W., Pickett, J. A., Birkett, M. A., Taki, H. and Takabayashi, J. 2016. Field evaluation of synthetic aphid sex pheromone in enhancing suppression of aphid abundance by their natural enemies. BioControl. 61 (5), pp. 485-496. https://doi.org/10.1007/s10526-016-9734-3

Flight performance of actively foraging honey bees is reduced by a common pathogen

A - Papers appearing in refereed journals

Wells, T., Wolf, S., Nicholls, E., Groll, H., Lim, K. S., Clark, S. J., Swain, J. L., Osborne, J. L. and Haughton, A. J. 2016. Flight performance of actively foraging honey bees is reduced by a common pathogen. Environmental Microbiology Reports. 8 (5), pp. 728-737. https://doi.org/10.1111/1758-2229.12434

Triticum monococcum lines with distinct metabolic phenotypes and phloem-based partial resistance to the bird cherry-oat aphid Rhopalosiphum padi

A - Papers appearing in refereed journals

Greenslade, A. F. C., Ward, J. L., Martin, J. L., Corol, D. I., Clark, S. J., Smart, L. E. and Aradottir, G. I. 2016. Triticum monococcum lines with distinct metabolic phenotypes and phloem-based partial resistance to the bird cherry-oat aphid Rhopalosiphum padi. Annals of Applied Biology - AAB. 168 (3), pp. 435-449. https://doi.org/10.1111/aab.12274

Dedicated biomass crops can enhance biodiversity in the arable landscape

A - Papers appearing in refereed journals

Haughton, A. J., Bohan, D. A., Clark, S. J., Mallott, M. D., Mallott, V., Sage, R. and Karp, A. 2016. Dedicated biomass crops can enhance biodiversity in the arable landscape. GCB Bioenergy. 8 (6), pp. 1071-1081. https://doi.org/10.1111/gcbb.12312

The effects of Nosema ceranae on honey bee flight distance

G - Articles in popular magazines and other technical publications

Wells, T., Nicholls, B., Wolf, S., Groll, H., Lim, K. S., Clark, S. J., Swain, J. L., Osborne, J. L. and Haughton, A. J. 2015. The effects of Nosema ceranae on honey bee flight distance. British bee journal. (2), p. 6.

Dynamics of competition and co-infection between Zoophthora radicans and Pandora blunckii in Plutella xylostella larvae

A - Papers appearing in refereed journals

Sandoval-Aguilar, J. A., Guzman-Franco, A. W., Pell, J. K., Clark, S. J., Alatorre-Rosas, R., Santillan-Galicia, M. T. and Valdovinos-Ponce, G. 2015. Dynamics of competition and co-infection between Zoophthora radicans and Pandora blunckii in Plutella xylostella larvae. Fungal Ecology. 17, pp. 1-9. https://doi.org/10.1016/j.funeco.2015.04.003

Appendix 4. Effect of brassica field margins on arthropod biodiversity and biocontrol in a wheat-oilseed rape rotation

D1 - Technical reports: non-confidential

Cook, S. M., Skellern, M. P., Torrance, M. T., Nevard, L., Watts, N. P., Clark, S. J. and Pell, J. K. 2015. Appendix 4. Effect of brassica field margins on arthropod biodiversity and biocontrol in a wheat-oilseed rape rotation.

Statistical methods in biology: design and analysis of experiments and regression

E - Books edited/written by staff member, alone/with others

Welham, S. J., Gezan, S. A., Clark, S. J. and Mead, A. 2015. Statistical methods in biology: design and analysis of experiments and regression. CRC Press, Boca Raton, Florida.

Temperature-activity relationships in Meligethes aeneus: implications for pest management

A - Papers appearing in refereed journals

Ferguson, A. W., Nevard, L. M., Clark, S. J. and Cook, S. M. 2015. Temperature-activity relationships in Meligethes aeneus: implications for pest management. Pest Management Science. 71 (3), pp. 459-466. https://doi.org/10.1002/ps.3860

Slow bee paralysis virus and its transmission in honey bee pupae by Varroa destructor

A - Papers appearing in refereed journals

Santillan-Galicia, M. T., Ball, B. V., Clark, S. J. and Alderson, P. G. 2014. Slow bee paralysis virus and its transmission in honey bee pupae by Varroa destructor. Journal of Apicultural Research. 53, pp. 146-154. https://doi.org/10.3896/IBRA.1.53.1.16

The efficacy of flufenacet based herbicides on Alopecurus myosuroides (black-grass): analysis of data from 375 field trials

C1 - Edited contributions to conferences/learned societies

Hull, R. I., Clark, S. J., Westrup, L. and Moss, S. R. 2014. The efficacy of flufenacet based herbicides on Alopecurus myosuroides (black-grass): analysis of data from 375 field trials. Crop production in Southern Britain: precision decisions for profitable cropping. Aspects of Applied Biology 127 . Association of Applied Biologists (AAB) Wellesbourne Warwick . pp. 49-56

Splash dispersal of Phyllosticta citricarpa conidia from infected citrus fruit

A - Papers appearing in refereed journals

Perryman, S. A. M., Clark, S. J. and West, J. S. 2014. Splash dispersal of Phyllosticta citricarpa conidia from infected citrus fruit. Scientific Reports. 4, p. 6568. https://doi.org/10.1038/srep06568

Flight of Meligethes aeneus at a range of altitudes

C1 - Edited contributions to conferences/learned societies

Mauchline, A. L., Cook, S. M., Powell, W., Chapman, J. W. and Osborne, J. L. 2014. Flight of Meligethes aeneus at a range of altitudes. IOBC.

So near and yet so far: harmonic radar reveals reduced homing ability of Nosema infected honeybees

A - Papers appearing in refereed journals

Wolf, S., McMahon, D. P., Lim, K. S., Pull, C. D., Clark, S. J., Paxton, R. J. and Osborne, J. L. 2014. So near and yet so far: harmonic radar reveals reduced homing ability of Nosema infected honeybees. PLOS ONE. 9, p. e103989. https://doi.org/10.1371/journal.pone.0103989

The ontogeny of bumblebee flight trajectories: from naive explorers to experienced foragers

A - Papers appearing in refereed journals

Osborne, J. L., Smith, A. D., Clark, S. J., Reynolds, D. R., Barron, M. C., Lim, K. S. and Reynolds, A. M. 2013. The ontogeny of bumblebee flight trajectories: from naive explorers to experienced foragers. PLOS ONE. 8 (11), p. e78681. https://doi.org/10.1371/journal.pone.0078681

Competition between isolates of Zoophthora radicans co-infecting Plutella xylostella populations

A - Papers appearing in refereed journals

Morales-Vidal, S., Alatorre-Rosas, R., Clark, S. J., Pell, J. K. and Guzman-Franco, A. W. 2013. Competition between isolates of Zoophthora radicans co-infecting Plutella xylostella populations. Journal of Invertebrate Pathology. 113, pp. 137-145. https://doi.org/10.1016/j.jip.2013.03.002

Effects of non-host plant odour on Melingethes aeneus during immigration to oilseed rape

A - Papers appearing in refereed journals

Mauchline, A. L., Cook, S. M., Powell, W. and Osborne, J. L. 2013. Effects of non-host plant odour on Melingethes aeneus during immigration to oilseed rape. Entomologia Experimentalis et Applicata. 146 (3), pp. 313-320. https://doi.org/10.1111/eea.12030

Use of honey bees (Apis mellifera L.) to detect the presence of Mediterranean fruit fly (Ceratitis capitata Wiedemann) larvae in Valencia oranges

A - Papers appearing in refereed journals

Chamberlain, K., Briens, M., Jacobs, J. H., Clark, S. J. and Pickett, J. A. 2012. Use of honey bees (Apis mellifera L.) to detect the presence of Mediterranean fruit fly (Ceratitis capitata Wiedemann) larvae in Valencia oranges. Journal of the Science of Food and Agriculture - jsfa. 92 (10), pp. 2050-2054. https://doi.org/10.1002/jsfa.5742

Odour-mediated orientation behaviour of the lily beetle Lilioceris lilii

A - Papers appearing in refereed journals

Salisbury, A., Cook, S. M., Powell, W. and Hardie, J. 2012. Odour-mediated orientation behaviour of the lily beetle Lilioceris lilii. Physiological Entomology. 37 (1), pp. 97-102. https://doi.org/10.1111/j.1365-3032.2011.00823.x

Three-point appraisal of genetic linkage maps

A - Papers appearing in refereed journals

Gilks, W. R., Welham, S. J., Wang, J., Clark, S. J. and King, G. J. 2012. Three-point appraisal of genetic linkage maps. Theoretical and Applied Genetics. 125, pp. 1393-1402. https://doi.org/10.1007/s00122-012-1920-9

Large carabid beetle declines in a United Kingdom monitoring network increases evidence for a widespread loss in insect biodiversity

A - Papers appearing in refereed journals

Brooks, D. R., Bater, J., Clark, S. J., Monteith, D. T., Andrews, C., Corbett, S. J., Beaumont, D. A. and Chapman, J. W. 2012. Large carabid beetle declines in a United Kingdom monitoring network increases evidence for a widespread loss in insect biodiversity. Journal of Applied Ecology. 49 (5), pp. 1009-1019. https://doi.org/10.1111/j.1365-2664.2012.02194.x

Two-step learning involved in acquiring olfactory preferences for plant volatiles by parasitic wasps

A - Papers appearing in refereed journals

Takemoto, H., Powell, W., Pickett, J. A., Kainoh, Y. and Takabayashi, J. 2012. Two-step learning involved in acquiring olfactory preferences for plant volatiles by parasitic wasps. Animal Behaviour. 83, pp. 1491-1496. https://doi.org/10.1016/j.anbehav.2012.03.023

Mesocosm experiments to assess the transmission of Pandora neoaphidis within simple and mixed field margins and over the crop-margin interface

A - Papers appearing in refereed journals

Baverstock, J., Torrance, M. T., Clark, S. J. and Pell, J. K. 2012. Mesocosm experiments to assess the transmission of Pandora neoaphidis within simple and mixed field margins and over the crop-margin interface. Journal of Invertebrate Pathology. 110, pp. 102-107. https://doi.org/10.1016/j.jip.2012.02.012

Trophic links between functional groups of arable plants and beetles are stable at national scale

A - Papers appearing in refereed journals

Brooks, D. R., Storkey, J., Clark, S. J., Firbank, L. G., Petit, S. and Woiwod, I. P. 2012. Trophic links between functional groups of arable plants and beetles are stable at national scale. Journal of Animal Ecology. 81 (1), pp. 4-13. https://doi.org/10.1111/j.1365-2656.2011.01897.x

Fitness trade-off in peach-potato aphids (Myzus persicae) between insecticide resistance and vulnerability to parasitoid attack at several spatial scales

A - Papers appearing in refereed journals

Foster, S. P., Denholm, I., Poppy, G. M., Thompson, R. and Powell, W. 2011. Fitness trade-off in peach-potato aphids (Myzus persicae) between insecticide resistance and vulnerability to parasitoid attack at several spatial scales. Bulletin of Entomological Research. 101 (6), pp. 659-666. https://doi.org/10.1017/S0007485310000623

Use of quantitative PCR to understand within-host competition between two entomopathogenic fungi

A - Papers appearing in refereed journals

Guzman-Franco, A. W., Atkins, S. D., Clark, S. J., Alderson, P. G. and Pell, J. K. 2011. Use of quantitative PCR to understand within-host competition between two entomopathogenic fungi. Journal of Invertebrate Pathology. 107, pp. 155-158. https://doi.org/10.1016/j.jip.2011.03.001

Potential value of the fibre nettle Urtica dioica as a resource for the nettle aphid Microlophium carnosum and its insect and fungal natural enemies

A - Papers appearing in refereed journals

Baverstock, J., Porcel, M., Clark, S. J., Copeland, J. E. and Pell, J. K. 2011. Potential value of the fibre nettle Urtica dioica as a resource for the nettle aphid Microlophium carnosum and its insect and fungal natural enemies. BioControl. 56 (2), pp. 215-223. https://doi.org/10.1007/s10526-010-9330-x

Trends in the timings of the start and end of annual flight periods

B - Book chapters etc edited externally

Harrington, R. and Clark, S. J. 2010. Trends in the timings of the start and end of annual flight periods. in: Dixon, A. F. G., Michaud, J. P. and Kindlmann, P. (ed.) Aphid biodiversity under environmental change Springer, Dordrecht. pp. 41-54

Transmission of deformed wing virus and slow paralysis virus to adult bees (Apis mellifera L.) by Varroa destructor

A - Papers appearing in refereed journals

Santillan-Galicia, M. T., Ball, B. V., Clark, S. J. and Alderson, P. G. 2010. Transmission of deformed wing virus and slow paralysis virus to adult bees (Apis mellifera L.) by Varroa destructor. Journal of Apicultural Research and Bee World. 49, pp. 141-148. https://doi.org/10.3896/IBRA.1.49.2.01

Susceptibility of six Lilium to damage by the lily beetle, Lilioceris lilii (Coleoptera: Chrysomelidae)

A - Papers appearing in refereed journals

Salisbury, A., Clark, S. J., Powell, W. and Hardie, J. 2010. Susceptibility of six Lilium to damage by the lily beetle, Lilioceris lilii (Coleoptera: Chrysomelidae). Annals of Applied Biology - AAB. 156 (1), pp. 103-110. https://doi.org/10.1111/j.1744-7348.2009.00368.x

Layers of nocturnal insect migrants at high-altitude: the influence of atmospheric conditions on their formation

A - Papers appearing in refereed journals

Wood, C. R., Clark, S. J., Barlow, J. F. and Chapman, J. W. 2010. Layers of nocturnal insect migrants at high-altitude: the influence of atmospheric conditions on their formation. Agricultural and Forest Entomology. 12 (1), pp. 113-121. https://doi.org/10.1111/j.1461-9563.2009.00459.x

Pollinator effectiveness and fruit set in common ivy, Hedera helix (Araliaceae)

A - Papers appearing in refereed journals

Jacobs, J. H., Clark, S. J., Denholm, I., Goulson, D., Stoate, C. and Osborne, J. L. 2010. Pollinator effectiveness and fruit set in common ivy, Hedera helix (Araliaceae). Arthropod-Plant Interactions. 4, pp. 19-28. https://doi.org/10.1007/s11829-009-9080-9

Perennial energy crops: implications and potential

B - Book chapters etc edited externally

Karp, A., Haughton, A. J., Bohan, D. A., Lovett, A. A., Bond, A. J., Dockerty, T., Sunnenberg, G., Finch, J. W., Sage, R. B., Appleton, K. J., Riche, A. B., Mallott, M. D., Mallott, V. E,., Cunningham, M. D., Clark, S. J. and Turner, M. M. 2009. Perennial energy crops: implications and potential. in: Winter, M. and Lobley, M. (ed.) What is land for? The food, fuel and climate change debate Earthscan Publications Ltd. pp. 47-72

The GAMes aphids play

C2 - Non-edited contributions to conferences

Bell, J. R., Harrington, R., Welham, S. J., Clark, S. J. and Pickup, J. 2009. The GAMes aphids play. Abstracts 8th International Symposium on Aphids, Catania, 8-12 June 2009 .

Learning is involved in the response of parasitic wasps Aphidius ervi (Haliday) (Hymenoptera: Braconidae) to volatiles from a broad bean plant, Vicia faba (Fabaceae), infested by aphids Acyrthosiphon pisum (Harris) (Homoptera: Aphididae)

A - Papers appearing in refereed journals

Takemoto, H., Powell, W., Pickett, J. A., Kainoh, Y. and Takabayashi, J. 2009. Learning is involved in the response of parasitic wasps Aphidius ervi (Haliday) (Hymenoptera: Braconidae) to volatiles from a broad bean plant, Vicia faba (Fabaceae), infested by aphids Acyrthosiphon pisum (Harris) (Homoptera: Aphididae). Applied Entomology and Zoology. 44, pp. 23-28. https://doi.org/10.1303/aez.2009.23

Competition and co-existence of Zoophthora radicans and Pandora blunckii , two co-occurring fungal pathogens of the diamondback moth, Plutella xylostella

A - Papers appearing in refereed journals

Guzman-Franco, A. W., Clark, S. J., Alderson, P. G. and Pell, J. K. 2009. Competition and co-existence of Zoophthora radicans and Pandora blunckii , two co-occurring fungal pathogens of the diamondback moth, Plutella xylostella. Mycological Research. 113 (11), pp. 1312-1321. https://doi.org/10.1016/j.mycres.2009.08.016

Intraguild interactions between the entomopathogenic fungus Pandora neoaphidis and an aphid predator and parasitoid at the population scale

A - Papers appearing in refereed journals

Baverstock, J., Clark, S. J., Alderson, P. G. and Pell, J. K. 2009. Intraguild interactions between the entomopathogenic fungus Pandora neoaphidis and an aphid predator and parasitoid at the population scale. Journal of Invertebrate Pathology. 102 (2), pp. 167-172. https://doi.org/10.1016/j.jip.2009.07.014

Pollination biology of fruit-bearing hedgerow plants and the role of flower-visiting insects in fruit-set

A - Papers appearing in refereed journals

Jacobs, J. H., Clark, S. J., Denholm, I., Goulson, D., Stoate, C. and Osborne, J. L. 2009. Pollination biology of fruit-bearing hedgerow plants and the role of flower-visiting insects in fruit-set. Annals of Botany. 104, pp. 1397-1404. https://doi.org/10.1093/aob/mcp236

Using adult mosquitoes to transfer insecticides to Aedes aegypti larval habitats

A - Papers appearing in refereed journals

Devine, G. J., Zamora-Perea, E., Killeen, G. F., Stancil, J. D., Clark, S. J. and Morrison, A. C. 2009. Using adult mosquitoes to transfer insecticides to Aedes aegypti larval habitats. Proceedings of the National Academy of Sciences of the United States of America - PNAS. 106, pp. 11530-11534. https://doi.org/10.1073/pnas.0901369106

Identification of human-derived volatile chemicals that interfere with attraction of the Scottish biting midge and their potential use as repellents

A - Papers appearing in refereed journals

Logan, J. G., Seal, N. J., Cook, J. I., Stanczyk, N. M., Birkett, M. A., Clark, S. J., Gezan, S. A., Wadhams, L. J., Pickett, J. A. and Mordue (Luntz), A. J. 2009. Identification of human-derived volatile chemicals that interfere with attraction of the Scottish biting midge and their potential use as repellents. Journal of Medical Entomology. 46 (2), pp. 208-219. https://doi.org/10.1603/033.046.0205

A novel, integrated approach to assessing social, economic and environmental implications of changing rural land-use: a case study of perennial biomass crops

A - Papers appearing in refereed journals

Haughton, A. J., Bond, A. J., Lovett, A. A., Dockerty, T., Sunnenberg, G., Clark, S. J., Bohan, D. A., Sage, R. B., Mallott, M. D., Mallott, V. E., Cunningham, M. D., Riche, A. B., Shield, I. F., Finch, J. W., Turner, M. M. and Karp, A. 2009. A novel, integrated approach to assessing social, economic and environmental implications of changing rural land-use: a case study of perennial biomass crops. Journal of Applied Ecology. 46 (2), pp. 315-322. https://doi.org/10.1111/j.1365-2664.2009.01623.x

Oilseed rape crop ecology: optimising crop husbandry for conservation biological control and greater biodiversity. Final report on DEFRA project AR0316.

D1 - Technical reports: non-confidential

Ferguson, A. W., Williams, I. H., Cook, S. M., Clark, S. J., Frearson, D. J. T., Holdgate, R., Isger, E. A., Mason, N. S., Watts, N. P. and Todd, A. 2008. Oilseed rape crop ecology: optimising crop husbandry for conservation biological control and greater biodiversity. Final report on DEFRA project AR0316. Department for Environment, Food & Rural Affairs (DEFRA).

Phenologies and diel periodicities of within-crop flight by pests and parasitoids in oilseed rape

C2 - Non-edited contributions to conferences

Ferguson, A. W., Holdgate, R., Mason, N. S., Clark, S. J. and Williams, I. H. 2008. Phenologies and diel periodicities of within-crop flight by pests and parasitoids in oilseed rape. Abstracts IOBC-WPRS, OILB-SROP, Working Group on Integrated Control in Oilseed Crops, Paris, 29 September - 1 October 2008 . pp. 16

Electrophysiological and behavioural responses of the pollen beetle, Meligethes aeneus , to volatiles from a non-host plant, lavender, Lavandula angustifolia (Lamiaceae)

A - Papers appearing in refereed journals

Mauchline, A. L., Birkett, M. A., Woodcock, C. M., Pickett, J. A., Osborne, J. L. and Powell, W. 2008. Electrophysiological and behavioural responses of the pollen beetle, Meligethes aeneus , to volatiles from a non-host plant, lavender, Lavandula angustifolia (Lamiaceae). Arthropod-Plant Interactions. 2, pp. 109-115. https://doi.org/10.1007/s11829-008-9038-3

Aggregation of parasitism risk in an aphid-parasitoid system: effects of plant patch size and aphid density

A - Papers appearing in refereed journals

Pareja, M., Brown, V. K. and Powell, W. 2008. Aggregation of parasitism risk in an aphid-parasitoid system: effects of plant patch size and aphid density. Basic and Applied Ecology. 9, pp. 701-708. https://doi.org/10.1016/j.baae.2007.10.008

Endoparasitism in cereal aphids: molecular analysis of a whole parasitoid community

A - Papers appearing in refereed journals

Traugott, M., Bell, J. R., Broad, G. R., Powell, W., Van Veen, F. J. F., Vollhardt, I. M. G. and Symondson, W. O. C. 2008. Endoparasitism in cereal aphids: molecular analysis of a whole parasitoid community. Molecular Ecology. 17 (17), pp. 3928-3938. https://doi.org/10.1111/j.1365-294X.2008.03878.x

Transmission of Pandora neoaphidis in the presence of co-occurring arthropods

C2 - Non-edited contributions to conferences

Baverstock, J., Baverstock, K. E., Clark, S. J. and Pell, J. K. 2008. Transmission of Pandora neoaphidis in the presence of co-occurring arthropods. Abstracts 41st Annual Meeting of the Society for Invertebrate Pathology, Warwick, 3-7 August 2008 . pp. 67

Effect of temperature on the in vitro radial growth of Zoophthora radicans and Pandora blunckii , two co-occurring fungal pathogens of the diamondback moth Plutella xylostella

A - Papers appearing in refereed journals

Guzman-Franco, A. W., Clark, S. J., Alderson, P. G. and Pell, J. K. 2008. Effect of temperature on the in vitro radial growth of Zoophthora radicans and Pandora blunckii , two co-occurring fungal pathogens of the diamondback moth Plutella xylostella. BioControl. 53, pp. 501-516. https://doi.org/10.1007/s10526-007-9095-z

Transmission of Pandora neoaphidis in the presence of co-occurring arthropods

A - Papers appearing in refereed journals

Baverstock, J., Baverstock, K. E., Clark, S. J. and Pell, J. K. 2008. Transmission of Pandora neoaphidis in the presence of co-occurring arthropods. Journal of Invertebrate Pathology. 98 (3), pp. 356-359. https://doi.org/10.1016/j.jip.2008.02.003

Weed and invertebrate community compositions in arable farmland

A - Papers appearing in refereed journals

Smith, V., Bohan, D. A., Clark, S. J., Haughton, A. J., Bell, J. R. and Heard, M. S. 2008. Weed and invertebrate community compositions in arable farmland. Arthropod-Plant Interactions. 2, pp. 21-30. https://doi.org/10.1007/s11829-007-9027-y

Intraguild predation of the aphid pathogenic fungus Pandora neoaphidis by the invasive coccinellid Harmonia axyridis

A - Papers appearing in refereed journals

Roy, H. E., Baverstock, J., Ware, R. L., Clark, S. J., Majerus, M. E. N., Baverstock, K. E. and Pell, J. K. 2008. Intraguild predation of the aphid pathogenic fungus Pandora neoaphidis by the invasive coccinellid Harmonia axyridis. Ecological Entomology. 33 (2), pp. 175-182. https://doi.org/10.1111/j.1365-2311.2007.00954.x

Identification of human-derived volatile chemicals that interfere with attraction of Aedes aegypti mosquitoes

A - Papers appearing in refereed journals

Logan, J. G., Birkett, M. A., Clark, S. J., Powers, S. J., Seal, N. J., Wadhams, L. J., Mordue (Luntz), A. J. and Pickett, J. A. 2008. Identification of human-derived volatile chemicals that interfere with attraction of Aedes aegypti mosquitoes. Journal of Chemical Ecology. 34, pp. 308-322. https://doi.org/10.1007/s10886-008-9436-0

National-scale metacommunity dynamics of carabid beetles in UK farmland

A - Papers appearing in refereed journals

Brooks, D. R., Perry, J. N., Clark, S. J., Heard, M. S., Firbank, L. G., Holdgate, R., Mason, N. S., Shortall, C. R., Skellern, M. P. and Woiwod, I. P. 2008. National-scale metacommunity dynamics of carabid beetles in UK farmland. Journal of Animal Ecology. 77 (2), pp. 265-274. https://doi.org/10.1111/j.1365-2656.2007.01331.x

Effect of seasonal abiotic conditions and field margin habitat on the activity of Pandora neoaphidis inoculum on soil

A - Papers appearing in refereed journals

Baverstock, J., Clark, S. J. and Pell, J. K. 2008. Effect of seasonal abiotic conditions and field margin habitat on the activity of Pandora neoaphidis inoculum on soil. Journal of Invertebrate Pathology. 97, pp. 282-290. https://doi.org/10.1016/j.jip.2007.09.004

Movement of transgenic plant-expressed Bt Cry1Ac proteins through high trophic levels

A - Papers appearing in refereed journals

Wei, W., Schuler, T. H., Clark, S. J., Stewart, C. N. Jr and Poppy, G. M. 2008. Movement of transgenic plant-expressed Bt Cry1Ac proteins through high trophic levels. Journal of Applied Entomology. 132 (1), pp. 1-11. https://doi.org/10.1111/j.1439-0418.2007.01242.x

The implications of genetically modified herbicide-tolerant crops for UK farmland biodiversity: a summary of the results of the Farm Scale Evaluations project

C1 - Edited contributions to conferences/learned societies

Brooks, D. R., Firbank, L. G., Bohan, D. A., Champion, G. T., Clark, S. J., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M. S., May, M. J., Osborne, J. L., Perry, J. N., Rothery, P., Roy, D. B., Scott, R. J., Squire, G. R. and Woiwod, I. P. 2007. The implications of genetically modified herbicide-tolerant crops for UK farmland biodiversity: a summary of the results of the Farm Scale Evaluations project. Proceedings Open Seminar on the Cultivation of Genetically Modified Crops and Evaluation of Ecological Effects, Tokyo, 3 November 2007 . NIAES, Tsukuba. pp. 29-52

Effect of the presence of a nonhost herbivore on the response of the aphid parasitoid Diaeretiella rapae to host-infested cabbage plants

A - Papers appearing in refereed journals

Agbogba, B. C. and Powell, W. 2007. Effect of the presence of a nonhost herbivore on the response of the aphid parasitoid Diaeretiella rapae to host-infested cabbage plants. Journal of Chemical Ecology. 33, pp. 2229-2235. https://doi.org/10.1007/s10886-007-9379-x

Foraging behaviour of the parasitoid Lysiphlebus testaceipes (Hymenoptera: Braconidae) in response to plant volatiles, with reference to biocontrol of aphids in peri-urban vegetable production systems

A - Papers appearing in refereed journals

Lopez Perez, M., Fernandez Argudin, M. and Powell, W. 2007. Foraging behaviour of the parasitoid Lysiphlebus testaceipes (Hymenoptera: Braconidae) in response to plant volatiles, with reference to biocontrol of aphids in peri-urban vegetable production systems. Biocontrol Science and Technology. 17, pp. 677-686. https://doi.org/10.1080/09583150701408949

Behavioural side-effects of insecticide resistance in aphids increase their vulnerability to parasitoid attack

A - Papers appearing in refereed journals

Foster, S. P., Tomiczek, M., Thompson, R., Denholm, I., Poppy, G. M., Kraaijeveld, A. R. and Powell, W. 2007. Behavioural side-effects of insecticide resistance in aphids increase their vulnerability to parasitoid attack. Animal Behaviour. 74 (3), pp. 621-632. https://doi.org/10.1016/j.anbehav.2006.12.018

Intraguild predation of the aphid pathogenic fungus Pandora neoaphidis by the invasive coccinellid Harmonia axyridis

C2 - Non-edited contributions to conferences

Baverstock, J., Roy, H. E., Ware, R. L., Clark, S. J., Majerus, M. E. N., Baverstock, K. E. and Pell, J. K. 2007. Intraguild predation of the aphid pathogenic fungus Pandora neoaphidis by the invasive coccinellid Harmonia axyridis. Abstracts Royal Entomological Society National Meeting (Ento 07), Edinburgh, 16-18 July 2007 . pp. 47

Responses of Phradis parasitoids to volatiles of lavender, Lavendula angustifolia - a possible repellent for their host, Meligethes aeneus

A - Papers appearing in refereed journals

Cook, S. M., Jonsson, M., Skellern, M. P., Murray, D. A., Anderson, P. and Powell, W. 2007. Responses of Phradis parasitoids to volatiles of lavender, Lavendula angustifolia - a possible repellent for their host, Meligethes aeneus. BioControl. 52, pp. 591-598. https://doi.org/10.1007/s10526-006-9057-x

Non-inversion tillage to conserve functional biodiversity for biocontrol of oilseed rape pests

C1 - Edited contributions to conferences/learned societies

Ferguson, A. W., Holdgate, R., Mason, N. S., Clark, S. J. and Williams, I. H. 2007. Non-inversion tillage to conserve functional biodiversity for biocontrol of oilseed rape pests. Proceedings 16th International Plant Protection Congress, Glasgow, 15-18 October 2007 . pp. 818-819

The influence of tillage on biocontrol agents of oilseed rape pests

C2 - Non-edited contributions to conferences

Ferguson, A. W., Holdgate, R., Mason, N. S., Clark, S. J. and Williams, I. H. 2007. The influence of tillage on biocontrol agents of oilseed rape pests. Abstracts Royal Entomological Society National Meeting (Ento 07), Edinburgh, 16-18 July 2007 . pp. 24

The effect [of] host plant characters on parasitism of inflorescence pests of oilseed rape

C2 - Non-edited contributions to conferences

Ferguson, A. W., Frearson, D. J. T., Mason, N. S., Todd, A. D., Clark, S. J. and Williams, I. H. 2007. The effect [of] host plant characters on parasitism of inflorescence pests of oilseed rape. Abstracts Royal Entomological Society National Meeting (Ento 07), Edinburgh, 16-18 July 2007 . pp. 18

Ecotypes of the model legume Lotus japonicus vary in their interaction phenotypes with the root-knot nematode Meloidogyne incognita

A - Papers appearing in refereed journals

Cabrera Poch, H. L., Manzanilla-Lopez, R. H. and Clark, S. J. 2007. Ecotypes of the model legume Lotus japonicus vary in their interaction phenotypes with the root-knot nematode Meloidogyne incognita. Annals of Botany. 99, pp. 1223-1229. https://doi.org/10.1093/aob/mcm058

Nematicidal effects of cysteine proteinases against sedentary plant parastic nematodes

A - Papers appearing in refereed journals

Stepek, G., Curtis, R. H. C., Kerry, B. R., Shewry, P. R., Clark, S. J., Lowe, A. E., Duce, I. R., Buttle, D. J. and Behnke, J. M. 2007. Nematicidal effects of cysteine proteinases against sedentary plant parastic nematodes. Parasitology. 134, pp. 1831-1838. https://doi.org/10.1017/S0031182007003289

Environmental change and the phenology of European aphids

A - Papers appearing in refereed journals

Harrington, R., Clark, S. J., Welham, S. J., Verrier, P. J., Denholm, C. H., Hulle, M., Maurice, D., Rounsevell, M. D., Cocu, N. and European Union Examine Consortium 2007. Environmental change and the phenology of European aphids. Global Change Biology. 13 (8), pp. 1550-1564. https://doi.org/10.1111/j.1365-2486.2007.01394.x

Farm Scale Evaluations of herbicide-tolerant crops: assessment of within-field variation and sampling methodology for arable weeds

A - Papers appearing in refereed journals

Clark, S. J., Rothery, P., Perry, J. N. and Heard, M. S. 2007. Farm Scale Evaluations of herbicide-tolerant crops: assessment of within-field variation and sampling methodology for arable weeds. Weed Research. 47 (2), pp. 157-163. https://doi.org/10.1111/j.1365-3180.2007.00541.x

Statistical models to evaluate invertebrate-plant trophic interactions in arable systems

A - Papers appearing in refereed journals

Bohan, D. A., Hawes, C., Haughton, A. J., Denholm, I., Champion, G. T., Perry, J. N. and Clark, S. J. 2007. Statistical models to evaluate invertebrate-plant trophic interactions in arable systems. Bulletin of Entomological Research. 97 (3), pp. 265-280. https://doi.org/10.1017/S0007485307004890

Influence of host plant on susceptibility of the aphid Acyrthosiphon pisum (Hemiptera: Aphididae) to the fungal pathogen Pandora neoaphidis (Zygomycetes: Entomophthorales)

A - Papers appearing in refereed journals

Tkaczuk, C., Shah, P. A., Clark, S. J. and Pell, J. K. 2007. Influence of host plant on susceptibility of the aphid Acyrthosiphon pisum (Hemiptera: Aphididae) to the fungal pathogen Pandora neoaphidis (Zygomycetes: Entomophthorales). European Journal of Entomology. 104, pp. 205-210. https://doi.org/10.14411/eje.2007.032

Response of the aphid parasitoid Aphidius funebris to volatiles from undamaged and aphid-infested Centaurea nigra

A - Papers appearing in refereed journals

Pareja, M., Moraes, M. C. B., Clark, S. J., Birkett, M. A. and Powell, W. 2007. Response of the aphid parasitoid Aphidius funebris to volatiles from undamaged and aphid-infested Centaurea nigra. Journal of Chemical Ecology. 33 (April), pp. 695-710. https://doi.org/10.1007/s10886-007-9260-y

Honey bees can disseminate a microbial control agent to more than one inflorescence pest of oilseed rape

A - Papers appearing in refereed journals

Carreck, N. L., Butt, T. M., Clark, S. J., Ibrahim, L., Isger, E. A., Pell, J. K. and Williams, I. H. 2007. Honey bees can disseminate a microbial control agent to more than one inflorescence pest of oilseed rape. Biocontrol Science and Technology. 17, pp. 179-191. https://doi.org/10.1080/09583150600937485

Functional biodiversity of aphid natural enemies: positive intra-guild interactions

C1 - Edited contributions to conferences/learned societies

Powell, W., Pell, J. K., Nakashima, Y., Baverstock, J. and Birkett, M. A. 2006. Functional biodiversity of aphid natural enemies: positive intra-guild interactions.

The effect of soil tillage on summer predator activity in a winter oilseed rape crop

C1 - Edited contributions to conferences/learned societies

Mason, N. S., Ferguson, A. W., Holdgate, R., Clark, S. J. and Williams, I. H. 2006. The effect of soil tillage on summer predator activity in a winter oilseed rape crop. Proceedings International Symposium on Integrated Pest Management, Gottingen, 3-5 April 2006 . British Crop Protection Council (BCPC). pp. on CD-ROM

The diel periodicity of within-crop flight by key parasitoids of oilseed rape pests

C1 - Edited contributions to conferences/learned societies

Holdgate, R., Ferguson, A. W., Mason, N. S., Clark, S. J. and Williams, I. H. 2006. The diel periodicity of within-crop flight by key parasitoids of oilseed rape pests. Proceedings International Symposium on Integrated Pest Management in Oilseed Rape, Gottingen, 3-5 April 2006 . British Crop Protection Council (BCPC). pp. on CD-ROM

Effects of successive seasons of genetically modified herbicide-tolerant maize cropping on weeds and invertebrates

A - Papers appearing in refereed journals

Heard, M. S., Clark, S. J., Rothery, P., Perry, J. N., Bohan, D. A., Brooks, D. R., Champion, G. T., Dewar, A. M., Hawes, C., Haughton, A. J., May, M. J., Scott, R. J., Stuart, R. S., Squire, G. R. and Firbank, L. G. 2006. Effects of successive seasons of genetically modified herbicide-tolerant maize cropping on weeds and invertebrates. Annals of Applied Biology - AAB. 149 (3), pp. 249-254. https://doi.org/10.1111/j.1744-7348.2006.00091.x

Chemically mediated intraguild predator avoidance by aphid parasitoids: interspecific variability in sensitivity to semiochemical trails of ladybird predators

A - Papers appearing in refereed journals

Nakashima, Y., Birkett, M. A., Pye, B. J. and Powell, W. 2006. Chemically mediated intraguild predator avoidance by aphid parasitoids: interspecific variability in sensitivity to semiochemical trails of ladybird predators. Journal of Chemical Ecology. 32, pp. 1989-1998. https://doi.org/10.1007/s10886-006-9123-y

Issues concerning the design and analysis of comparative field experiments

A - Papers appearing in refereed journals

Welham, S. J. and Clark, S. J. 2006. Issues concerning the design and analysis of comparative field experiments. Outlooks on Pest Management. 17, pp. 175-180. https://doi.org/10.1564/17aug10

Weed seed resources for birds in fields with contrasting conventional and genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Gibbons, D. W., Bohan, D. A., Rothery, P., Stuart, R. C., Haughton, A. J., Scott, R. J., Wilson, J. D., Perry, J. N., Clark, S. J., Dawson, R. J. G. and Firbank, L. G. 2006. Weed seed resources for birds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. Proceedings of the Royal Society of London Series B Biological Sciences. 273, pp. 1921-1928. https://doi.org/10.1098/rspb.2006.3522

Bee-mediated infection of inflorescence pests of oilseed rape by the entomopathogenic fungus Metarhizium anisopliae

C1 - Edited contributions to conferences/learned societies

Williams, I. H., Butt, T. M., Carreck, N. L., Clark, S. J., Ibrahim, L., Isger, E. A. and Pell, J. K. 2006. Bee-mediated infection of inflorescence pests of oilseed rape by the entomopathogenic fungus Metarhizium anisopliae. Proceedings International Symposium on Integrated Pest Management in Oilseed Rape, Gottingen, 3-5 April 2006 . British Crop Protection Council (BCPC). pp. on CD-ROM

Long-term trends in aerial insect populations. Final report to English Nature

D1 - Technical reports: non-confidential

Shortall, C. R., Harrington, R., Hall, M. J. and Clark, S. J. 2006. Long-term trends in aerial insect populations. Final report to English Nature. English Nature.

Effects of genetically modified herbicide-tolerant cropping systems on weed seedbanks in two years of following crops

A - Papers appearing in refereed journals

Firbank, L. G., Rothery, P., May, M. J., Clark, S. J., Scott, R. J., Stuart, R. C., Boffey, C. W. H., Brooks, D. R., Champion, G. T., Haughton, A. J., Hawes, C., Heard, M. S., Dewar, A. M., Perry, J. N. and Squire, G. R. 2006. Effects of genetically modified herbicide-tolerant cropping systems on weed seedbanks in two years of following crops. Biology Letters. 2, pp. 140-143. https://doi.org/10.1098/rsbl.2005.0390

Farm Scale Evaluations of spring-sown genetically modified herbicide-tolerant crops: a statistical assessment

A - Papers appearing in refereed journals

Clark, S. J., Rothery, P. and Perry, J. N. 2006. Farm Scale Evaluations of spring-sown genetically modified herbicide-tolerant crops: a statistical assessment. Proceedings of the Royal Society of London Series B Biological Sciences. 272, pp. 237-243. https://doi.org/10.1098/rspb.2005.3282

Effect of fungal infection on the reproductive potential of aphids and their progeny

A - Papers appearing in refereed journals

Baverstock, J., Roy, H. E., Clark, S. J., Alderson, P. G. and Pell, J. K. 2006. Effect of fungal infection on the reproductive potential of aphids and their progeny. Journal of Invertebrate Pathology. 91, pp. 136-139. https://doi.org/10.1016/j.jip.2005.11.005

Avoidance of intraguild predators by parasitoids: chemical mechanisms, behaviour and field evaluation

C1 - Edited contributions to conferences/learned societies

Nakashima, Y., Birkett, M. A. and Powell, W. 2005. Avoidance of intraguild predators by parasitoids: chemical mechanisms, behaviour and field evaluation. Proceedings International Symposium on Biological Control of Aphids and Coccids, Tsuruoka, Japan, 25-29 September 2005 .

Age-related increase in levels of insecticidal protein in the progenies of transgenic oilseed rape and its efficacy against a susceptible strain of diamondback moth

A - Papers appearing in refereed journals

Wei, W., Schuler, T. H., Clark, S. J., Stewart, C. N. and Poppy, G. M. 2005. Age-related increase in levels of insecticidal protein in the progenies of transgenic oilseed rape and its efficacy against a susceptible strain of diamondback moth. Annals of Applied Biology - AAB. 147 (3), pp. 227-234. https://doi.org/10.1111/j.1744-7348.2005.00024.x

Wheat containing snowdrop lectin (GNA) does not affect infection of the cereal aphid Metopolophium dirhodum by the fungal natural enemy Pandora neoaphidis

A - Papers appearing in refereed journals

Shah, P. A., Gatehouse, A. M. R., Clark, S. J. and Pell, J. K. 2005. Wheat containing snowdrop lectin (GNA) does not affect infection of the cereal aphid Metopolophium dirhodum by the fungal natural enemy Pandora neoaphidis. Transgenic Research. 14, pp. 473-476. https://doi.org/10.1007/s11248-005-5877-1

The behavioural responses of the pollen beetle (Meligethes aeneus )to floral colours and odours: designing a 'push-pull' pest management strategy

C2 - Non-edited contributions to conferences

Cook, S. M., Rasmussen, H. B., Skellern, M. P., Watts, N. P., Williams, I. H. and Powell, W. 2005. The behavioural responses of the pollen beetle (Meligethes aeneus )to floral colours and odours: designing a 'push-pull' pest management strategy. Abstracts Entomology 2005, Brighton, 12-14 September 2005 . pp. 27

Invertebrate biodiversity in maize following withdrawal of triazine herbicides

A - Papers appearing in refereed journals

Brooks, D. R., Clark, S. J., Perry, J. N., Bohan, D. A., Champion, G. T., Firbank, L. G., Haughton, A. J., Hawes, C., Heard, M. S. and Woiwod, I. P. 2005. Invertebrate biodiversity in maize following withdrawal of triazine herbicides. Proceedings of the Royal Society of London Series B Biological Sciences. 272, pp. 1497-1502. https://doi.org/10.1098/rspb.2005.3102

Laboratory studies of the effects of reduced prey choice caused by Bt plants on a predatory insect

A - Papers appearing in refereed journals

Schuler, T. H., Clark, A. J., Clark, S. J., Poppy, G. M., Stewart, C. N. Jr and Denholm, I. 2005. Laboratory studies of the effects of reduced prey choice caused by Bt plants on a predatory insect. Bulletin of Entomological Research. 95 (3), pp. 243-247. https://doi.org/10.1079/BER2004356

The effects of non-host plant essential oil volatiles on the behaviour of the pollen beetle Meligethes aeneus

A - Papers appearing in refereed journals

Mauchline, A. L., Osborne, J. L., Martin, A. P., Poppy, G. M. and Powell, W. 2005. The effects of non-host plant essential oil volatiles on the behaviour of the pollen beetle Meligethes aeneus. Entomologia Experimentalis et Applicata. 114 (3), pp. 181-188. https://doi.org/10.1111/j.1570-7458.2005.00237.x

Effects on weed and invertebrate abundance and diversity of herbicide management in genetically modified herbicide-tolerant winter-sown oilseed rape

A - Papers appearing in refereed journals

Bohan, D. A., Boffey, C. W. H., Brooks, D. R., Clark, S. J., Dewar, A. M., Firbank, L. G., Haughton, A. J., Hawes, C., Heard, M. S., May, M. J., Osborne, J. L., Perry, J. N., Rothery, P., Roy, D. B., Scott, R. J., Squire, G. R., Woiwod, I. P. and Champion, G. T. 2005. Effects on weed and invertebrate abundance and diversity of herbicide management in genetically modified herbicide-tolerant winter-sown oilseed rape. Proceedings of the Royal Society of London Series B Biological Sciences. 272, pp. 463-474. https://doi.org/10.1098/rspb.2004.3049

Effect of a turnip rape (Brassica rapa ) trap crop on stem-mining pests and their parasitoids in winter oilseed rape (Brassica napus )

A - Papers appearing in refereed journals

Barari, H., Cook, S. M., Clark, S. J. and Williams, I. H. 2005. Effect of a turnip rape (Brassica rapa ) trap crop on stem-mining pests and their parasitoids in winter oilseed rape (Brassica napus ). BioControl. 50, pp. 69-86. https://doi.org/10.1007/s10526-004-0895-0

Insect behavioural ecology and other factors affecting the control efficacy of agro-ecosystem diversification strategies

A - Papers appearing in refereed journals

Potting, R. P. J., Perry, J. N. and Powell, W. 2005. Insect behavioural ecology and other factors affecting the control efficacy of agro-ecosystem diversification strategies. Ecological Modelling. 182, pp. 199-216.

Conservation biological control with the fungal pathogen Pandora neoaphidis : implications of aphid species, host plant and predator foraging

A - Papers appearing in refereed journals

Ekesi, S., Shah, P. A., Clark, S. J. and Pell, J. K. 2005. Conservation biological control with the fungal pathogen Pandora neoaphidis : implications of aphid species, host plant and predator foraging. Agricultural and Forest Entomology. 7 (1), pp. 21-30. https://doi.org/10.1111/j.1461-9555.2005.00239.x

Reduced response of insecticide-resistant aphids and attraction of parasitoids to aphid alarm pheromone; a potential fitness trade-off

A - Papers appearing in refereed journals

Foster, S. P., Denholm, I., Thompson, R., Poppy, G. M. and Powell, W. 2005. Reduced response of insecticide-resistant aphids and attraction of parasitoids to aphid alarm pheromone; a potential fitness trade-off. Bulletin of Entomological Research. 95 (1), pp. 37-46. https://doi.org/10.1079/BER2004336

Parasitoid impact on aphid populations in UK cereal crops and attempts at manipulation

C2 - Non-edited contributions to conferences

Powell, W. 2004. Parasitoid impact on aphid populations in UK cereal crops and attempts at manipulation. Abstracts Strength in Diversity: 22nd International Congress of Entomology, Brisbane, 15-21 August 2004 .

Pushing insects around: the use of 'push-pull' strategies in integrated pest management

C2 - Non-edited contributions to conferences

Cook, S. M., Powell, W., Smart, L. E., Watts, N. P. and Williams, I. H. 2004. Pushing insects around: the use of 'push-pull' strategies in integrated pest management. Abstracts Strength in Diversity: 22nd International Congress of Entomology, Brisbane, 15-21 August 2004 .

Interactions between Pandora blunckii and Zoophthora radicans isolates in Plutella xylostella populations

C2 - Non-edited contributions to conferences

Guzman-Franco, A., Clark, S. J., Alderson, P. G. and Pell, J. K. 2004. Interactions between Pandora blunckii and Zoophthora radicans isolates in Plutella xylostella populations. Abstracts 37th Annual Meeting of the Society for Invertebrate Pathology, Helsinki, 1-6 August 2004 . pp. 68

Evidence for gene flow and local clonal selection in field populations of the grain aphid (Sitobion avenae ) in Britain revealed using microsatellites

A - Papers appearing in refereed journals

Llewellyn, K. S., Loxdale, H. D., Harrington, R., Clark, S. J. and Sunnucks, P. 2004. Evidence for gene flow and local clonal selection in field populations of the grain aphid (Sitobion avenae ) in Britain revealed using microsatellites. Heredity. 93, pp. 143-153.

Pleiotropic effects of insecticide resistance genes in an aphid pest on vulnerability to attack by parasitoid wasps

C2 - Non-edited contributions to conferences

Foster, S. P., Denholm, I. and Powell, W. 2004. Pleiotropic effects of insecticide resistance genes in an aphid pest on vulnerability to attack by parasitoid wasps. Abstracts Strength in Diversity: 22nd International Congress of Entomology, Brisbane, 15-21 August 2004 .

Effect of fungal infection on the reproductive potential of aphids and their progeny

C2 - Non-edited contributions to conferences

Baverstock, J., Roy, H. E., Clark, S. J. and Pell, J. K. 2004. Effect of fungal infection on the reproductive potential of aphids and their progeny. Abstracts 37th Annual Meeting of the Society for Invertebrate Pathology, Helsinki, 1-6 August 2004 . pp. 68

The role of semiochemicals in the avoidance of the seven-spot ladybird, Coccinella septempunctata , by the aphid parasitoid, Aphidius ervi

A - Papers appearing in refereed journals

Nakashima, Y., Birkett, M. A., Pye, B. J., Pickett, J. A. and Powell, W. 2004. The role of semiochemicals in the avoidance of the seven-spot ladybird, Coccinella septempunctata , by the aphid parasitoid, Aphidius ervi. Journal of Chemical Ecology. 30, pp. 1103-1116.

Research needs on the design, analysis and statistical powers of studies of the effects of agricultural practices on biodiversity

C1 - Edited contributions to conferences/learned societies

Perry, J. N., Clark, S. J. and Rothery, P. 2004. Research needs on the design, analysis and statistical powers of studies of the effects of agricultural practices on biodiversity. Watt, A. D., Kull, T., Scally, L., Tinch, R., Young, J. and Bolger, T. (ed.) Sustaining Livelihoods and Biodiversity - Attaining the 2010 Target in the European Biodiversity Strategy. Report of an Electronic Conference, May 2004 . pp. 36

Genetic manipulation of natural enemies: can we improve biological control by manipulating the parasitoid and/or the plant?

B - Book chapters etc edited externally

Poppy, G. M. and Powell, W. 2004. Genetic manipulation of natural enemies: can we improve biological control by manipulating the parasitoid and/or the plant? in: Mateille, T., Ehler, L. E. and Sforza, R. (ed.) Genetics, evolution and biological control CABI International, Wallingford, Oxon (CABI). pp. 219-233

Ban on triazine herbicides likely to reduce but not negate relative benefits of GMHT maize cropping

A - Papers appearing in refereed journals

Perry, J. N., Firbank, L. G., Champion, G. T., Clark, S. J., Heard, M. S., May, M. J., Hawes, C., Squire, G. R., Rothery, P., Woiwod, I. P. and Pidgeon, J. D. 2004. Ban on triazine herbicides likely to reduce but not negate relative benefits of GMHT maize cropping. Nature. 428 (6980), pp. 313-316. https://doi.org/10.1038/nature02374

Feeding responses of carabid beetles to dimethoate- contaminated prey

A - Papers appearing in refereed journals

Mauchline, A. L., Osborne, J. L. and Powell, W. 2004. Feeding responses of carabid beetles to dimethoate- contaminated prey. Agricultural and Forest Entomology. 6 (2), pp. 99-104. https://doi.org/10.1111/j.1461-9563.2004.00208.x

Effects of Bt plants on the development and survival of the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) in susceptible and Bt-resistant larvae of the diamondback moth Plutella xylostella (Lepidoptera: Plutellidae)

A - Papers appearing in refereed journals

Schuler, T. H., Denholm, I., Clark, S. J., Stewart, C. N. and Poppy, G. M. 2004. Effects of Bt plants on the development and survival of the parasitoid Cotesia plutellae (Hymenoptera: Braconidae) in susceptible and Bt-resistant larvae of the diamondback moth Plutella xylostella (Lepidoptera: Plutellidae). Journal of Insect Physiology. 50, pp. 435-443.

Assessment of aphid host range and isolate variability in Pandora neoaphidis (Zygomycetes: Entomophthorales)

A - Papers appearing in refereed journals

Shah, P. A., Clark, S. J. and Pell, J. K. 2004. Assessment of aphid host range and isolate variability in Pandora neoaphidis (Zygomycetes: Entomophthorales). Biological Control. 29, pp. 90-99. https://doi.org/10.1016/S1049-9644(03)00130-0

Using field margin diversification in agri-environment schemes to enhance aphid natural enemies

C1 - Edited contributions to conferences/learned societies

Powell, W., Walters, K., A'hara, S., Ashby, J., Stevenson, H. and Northing, P. 2003. Using field margin diversification in agri-environment schemes to enhance aphid natural enemies.

Determination of plant foraging preferences in the aphid parasitoid Aphidius colemani : emergence conditioning, learning and memory

C2 - Non-edited contributions to conferences

Powell, W., Storeck, A., Poppy, G. M. and Van Emden, H. 2003. Determination of plant foraging preferences in the aphid parasitoid Aphidius colemani : emergence conditioning, learning and memory. Oxford Univ Press Inc.

Avoidance of intraguild predators by parasitoids: chemically mediated behavioural mechanisms and field evaluation

C2 - Non-edited contributions to conferences

Nakashima, Y., Birkett, M. A. and Powell, W. 2003. Avoidance of intraguild predators by parasitoids: chemically mediated behavioural mechanisms and field evaluation. Oxford University Press (OUP) Oxford. https://doi.org/10.1093/jis/3.1.33

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 April 2003

D1 - Technical reports: non-confidential

Firbank, L. G., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Fairfax, C., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rossall, M., Rothery, P., Roy, D., Scott, R., Squire, G., Whittaker, D. and Woiwod, I. P. 2003. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 April 2003.

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 November 2003

D1 - Technical reports: non-confidential

Firbank, L. G., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rothery, P., Roy, D., Scott, R., Squire, G. and Woiwod, I. P. 2003. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 November 2003.

Direct and indirect estimates of Pandora neoaphidis conidia in laboratory bioassays with aphids

A - Papers appearing in refereed journals

Shah, P. A., Clark, S. J. and Pell, J. K. 2003. Direct and indirect estimates of Pandora neoaphidis conidia in laboratory bioassays with aphids. Journal of Invertebrate Pathology. 84, pp. 145-147.

Population dynamics of the large nettle aphid, Microlophium carnosum , and entomopathogenic fungi

C2 - Non-edited contributions to conferences

Shah, P. A., Clark, S. J. and Pell, J. K. 2003. Population dynamics of the large nettle aphid, Microlophium carnosum , and entomopathogenic fungi. Abstracts British Ecological Society Annual Meeting, Manchester, 9-11 September 2003 .

The implications of spring-sown genetically modified herbicide-tolerant crops for farmland biodiversity: a commentary on the Farm Scale Evaluations of spring sown crops (DEFRA report)

D1 - Technical reports: non-confidential

Firbank, L. G., Perry, J. N., Squire, G. R., Bohan, D. A., Brooks, D. R., Champion, G. T., Clark, S. J., Daniels, R. E., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M. S., Hill, M. O., May, M. J., Osborne, J. L., Rothery, P., Roy, D. B., Scott, R. J. and Woiwod, I. P. 2003. The implications of spring-sown genetically modified herbicide-tolerant crops for farmland biodiversity: a commentary on the Farm Scale Evaluations of spring sown crops (DEFRA report).

Design of the farm-scale evaluations of genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Rothery, P., Clark, S. J. and Perry, J. N. 2003. Design of the farm-scale evaluations of genetically modified herbicide-tolerant crops. Environmetrics. 14 (7), pp. 711-717. https://doi.org/10.1002/env.619

Responses of plants and invertebrate trophic groups to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Hawes, C., Haughton, A. J., Osborne, J. L., Roy, D. B., Clark, S. J., Perry, J. N., Rothery, P., Bohan, D. A., Brooks, D. R., Champion, G. T., Dewar, A. M., Heard, M. S., Woiwod, I. P., Daniels, R. E., Young, M. W., Parish, A. M., Scott, R. J., Firbank, L. G. and Squire, G. R. 2003. Responses of plants and invertebrate trophic groups to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide-tolerant crops. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1899-1913.

Invertebrates and vegetation of field margins adjacent to crops subject to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Roy, D. B., Bohan, D. A., Haughton, A. J., Hill, M. O., Osborne, J. L., Clark, S. J., Perry, J. N., Rothery, P., Scott, R. J., Brooks, D. R., Champion, G. T., Hawes, C., Heard, M. S. and Firbank, L. G. 2003. Invertebrates and vegetation of field margins adjacent to crops subject to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide-tolerant crops. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1879-1898.

Invertebrate responses to the management of genetically modified herbicide-tolerant and conventional spring crops. II. Within-field epigeal and aerial arthropods

A - Papers appearing in refereed journals

Haughton, A. J., Champion, G. T., Hawes, C., Heard, M. S., Brooks, D. R., Bohan, D. A., Clark, S. J., Dewar, A. M., Firbank, L. G., Osborne, J. L., Perry, J. N., Rothery, P., Roy, D. B., Scott, R. J., Woiwod, I. P., Birchall, C., Skellern, M. P., Walker, J. H., Baker, P., Browne, E. L., Dewar, A. J. G., Garner, B. H., Haylock, L. A., Horne, S. L., Mason, N. S., Sands, R. J. N. and Walker, M. J. 2003. Invertebrate responses to the management of genetically modified herbicide-tolerant and conventional spring crops. II. Within-field epigeal and aerial arthropods. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1863-1877.

Invertebrate responses to the management of genetically modified herbicide-tolerant and conventional spring crops. I. Soil-surface-active invertebrates

A - Papers appearing in refereed journals

Brooks, D. R., Bohan, D. A., Champion, G. T., Haughton, A. J., Hawes, C., Heard, M. S., Clark, S. J., Dewar, A. M., Firbank, L. G., Perry, J. N., Rothery, P., Scott, R. J., Woiwod, I. P., Birchall, C., Skellern, M. P., Walker, J. H., Baker, P., Bell, D., Browne, E. L., Dewar, A. J. G., Fairfax, C. M., Garner, B. H., Haylock, L. A., Horne, S. L., Hulmes, S. E., Mason, N. S., Norton, L. R., Nuttall, P., Sands, R. J. N. and Walker, M. J. 2003. Invertebrate responses to the management of genetically modified herbicide-tolerant and conventional spring crops. I. Soil-surface-active invertebrates. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1847-1862. https://doi.org/10.1098/rstb.2003.1407

Weeds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. II. Effects on individual species

A - Papers appearing in refereed journals

Heard, M. S., Hawes, C., Champion, G. T., Clark, S. J., Firbank, L. G., Haughton, A. J., Parish, A. M., Perry, J. N., Rothery, P., Roy, D. B., Scott, R. J., Skellern, M. P., Squire, G. R. and Hill, M. O. 2003. Weeds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. II. Effects on individual species. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1833-1846.

Weeds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. I. Effects on abundance and diversity

A - Papers appearing in refereed journals

Heard, M. S., Hawes, C., Champion, G. T., Clark, S. J., Firbank, L. G., Haughton, A. J., Parish, A. M., Perry, J. N., Rothery, P., Scott, R. J., Skellern, M. P., Squire, G. R. and Hill, M. O. 2003. Weeds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. I. Effects on abundance and diversity. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1819-1832.

Crop management and agronomic context of the Farm Scale Evaluations of genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Champion, G. T., May, M. J., Bennett, S., Brooks, D. R., Clark, S. J., Daniels, R. E., Firbank, L. G., Haughton, A. J., Hawes, C., Heard, M. S., Perry, J. N., Randle, Z., Rossall, M. J., Rothery, P., Skellern, M. P., Scott, R. J., Squire, G. R. and Thomas, M. R. 2003. Crop management and agronomic context of the Farm Scale Evaluations of genetically modified herbicide-tolerant crops. Philosophical Transactions of the Royal Society B-Biological Sciences. 358, pp. 1801-1818.

Tritrophic interactions between Pandora neoaphidis , three aphid species and different host plant resources

C2 - Non-edited contributions to conferences

Shah, P. A., Clark, S. J. and Pell, J. K. 2003. Tritrophic interactions between Pandora neoaphidis , three aphid species and different host plant resources. Abstracts 36th Annual Meeting of the Society for Invertebrate Pathology, Burlington, 26-30 July 2003 . pp. 72

Ecological role of the large nettle aphid, Microlophium carnosum , as an early season source of Pandora neoaphidis

C2 - Non-edited contributions to conferences

Shah, P. A., Clark, S. J. and Pell, J. K. 2003. Ecological role of the large nettle aphid, Microlophium carnosum , as an early season source of Pandora neoaphidis. Abstracts 36th Annual Meeting of the Society for Invertebrate Pathology, Burlington, 26-30 July 2003 . pp. 71-72

Impacts of environmental change on aphids throughout Europe

C2 - Non-edited contributions to conferences

Harrington, R., Denholm, C. H., Verrier, P. J., Clark, S. J., Welham, S. J., Hulle, M., Maurice, D., Rounsevell, M., Cocu, N., Knight, J., Bell, N., Barbagallo, S., Basky, Z., Coceano, P. G., Derron, J., Katis, N., Lukasova, H., Marrkula, I., Mohar, J., Pickup, J., Rolot, J-L., Ruszkowska, M., Schliephake, E., Seco-Fernandez, M-V., Sigvald, R., Tsitsipis, J. and Ulber, B. 2003. Impacts of environmental change on aphids throughout Europe. Abstracts Integrated Biological Systems Conference, San Antonio, Texas, 14-16 April 2003 . pp. 39-40

Spatial distribution of pest insects in oilseed rape: implications for integrated pest management

A - Papers appearing in refereed journals

Ferguson, A. W., Klukowski, Z., Walczak, B., Clark, S. J., Mugglestone, M. A., Perry, J. N. and Williams, I. H. 2003. Spatial distribution of pest insects in oilseed rape: implications for integrated pest management. Agriculture, Ecosystems & Environment. 95 (2-3), pp. 509-521. https://doi.org/10.1016/S0167-8809(02)00200-1

Design, analysis and statistical power of the Farm-Scale Evaluations of genetically modified herbicide-tolerant crops

A - Papers appearing in refereed journals

Perry, J. N., Rothery, P., Clark, S. J., Heard, M. S. and Hawes, C. 2003. Design, analysis and statistical power of the Farm-Scale Evaluations of genetically modified herbicide-tolerant crops. Journal of Applied Ecology. 40 (1), pp. 17-31. https://doi.org/10.1046/j.1365-2664.2003.00786.x

Laboratory evaluation of temperature effects on the germination and growth of entomopathogenic fungi and on their pathogenicity to two aphid species

A - Papers appearing in refereed journals

Yeo, H., Pell, J. K., Alderson, P. G., Clark, S. J. and Pye, B. J. 2003. Laboratory evaluation of temperature effects on the germination and growth of entomopathogenic fungi and on their pathogenicity to two aphid species. Pest Management Science. 59 (2), pp. 156-165. https://doi.org/10.1002/ps.622

Migration and genetic structure of the grain aphid (Sitobion avenae ) in Britain related to climate and clonal fluctuation as revealed using microsatellites

A - Papers appearing in refereed journals

Llewellyn, K. S., Loxdale, H. D., Harrington, R., Brookes, C. P., Clark, S. J. and Sunnucks, P. 2003. Migration and genetic structure of the grain aphid (Sitobion avenae ) in Britain related to climate and clonal fluctuation as revealed using microsatellites. Molecular Ecology. 12 (1), pp. 21-34. https://doi.org/10.1046/j.1365-294X.2003.01703.x

Tritrophic choice experiments with Bt plants, the diamondback moth (Plutella xylostella ) and the parasitoid Cotesia plutellae

A - Papers appearing in refereed journals

Schuler, T. H., Potting, R. P. J., Denholm, I., Clark, S. J., Clark, A. J., Stewart, C. N. and Poppy, G. M. 2003. Tritrophic choice experiments with Bt plants, the diamondback moth (Plutella xylostella ) and the parasitoid Cotesia plutellae. Transgenic Research. 12, pp. 351-361.

Manipulation of parasitoids for aphid pest management: progress and prospects

A - Papers appearing in refereed journals

Powell, W. and Pickett, J. A. 2003. Manipulation of parasitoids for aphid pest management: progress and prospects. Pest Management Science. 59 (2), pp. 149-155. https://doi.org/10.1002/ps.550

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 27 March 2002

D1 - Technical reports: non-confidential

Firbank, L. G., Bennett, S., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Norton, L., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rothery, P., Roy, D., Scott, R., Squire, G., Watkins, J., Whittaker, D. and Woiwod, I. P. 2002. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 27 March 2002.

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 November 2002

D1 - Technical reports: non-confidential

Firbank, L. G., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Fairfax, C., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rossall, M., Rothery, P., Roy, D., Scott, R., Squire, G., Whittaker, D. and Woiwod, I. P. 2002. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 1 November 2002.

Examine(exploitation of aphis monitoring in europe): an EU thematic network for the study of global change impacts on aphid dynamics

C2 - Non-edited contributions to conferences

Denholm, C. H., Barbagallo, S., Basky, Z., Bell, J. N. B., Clark, S. J., Coceano, P-G., Cocu, N., Colucci, R., Derron, J., Ferrara, V., Gotlin Euljak, T., Harrington, R., Hatala Zseller, I., Hulle, M., Katis, N., Knight, J. D., Limonta, L., Lukasova, H., Markkula, I., Maurice, D., Mohar, J., Pickup, J., Rolot, J-L., Rounsevell, M. D. A., Ruszkowska, M., Schleiphake, E., Seco-Fernandez, M. V., Sigvald, R., Verrier, P. J. and Welham, S. J. 2002. Examine(exploitation of aphis monitoring in europe): an EU thematic network for the study of global change impacts on aphid dynamics. Abstracts 7th European Congress of Entomology, Thessaloniki, 7-13 October 2002 . pp. 317

Plant-to-plant communication mediating in-flight orientation of Aphidius ervi

A - Papers appearing in refereed journals

Guerrieri, E., Poppy, G. M., Powell, W., Rao, R. and Pennacchio, F. 2002. Plant-to-plant communication mediating in-flight orientation of Aphidius ervi. Journal of Chemical Ecology. 28, pp. 1703-1715.

Laboratory bioassays to assess the pathogenicity of mitosporic fungi to Varroa destructor (Acari: Mesostigmata), an ectoparasitic mite of the honeybee, Apis mellifera

A - Papers appearing in refereed journals

Shaw, K. E., Davidson, G., Clark, S. J., Ball, B. V., Pell, J. K., Chandler, D. and Sunderland, K. D. 2002. Laboratory bioassays to assess the pathogenicity of mitosporic fungi to Varroa destructor (Acari: Mesostigmata), an ectoparasitic mite of the honeybee, Apis mellifera. Biological Control. 24, pp. 266-276. https://doi.org/10.1016/S1049-9644(02)00029-4

Possibilities and constraints of agro-ecosystem diversification as a pest management strategy: a simulation approach

C1 - Edited contributions to conferences/learned societies

Potting, R. P. J., Perry, J. N. and Powell, W. 2002. Possibilities and constraints of agro-ecosystem diversification as a pest management strategy: a simulation approach. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2002 . pp. 91-96

Sub-lethal effects of the insecticides pirimicarb and dimethoate on the aphid parasitoid Diaeretiella rapae (Hymenoptera: Braconidae) when attacking and developing in insecticide-resistant hosts

A - Papers appearing in refereed journals

Umoru, P. A. and Powell, W. 2002. Sub-lethal effects of the insecticides pirimicarb and dimethoate on the aphid parasitoid Diaeretiella rapae (Hymenoptera: Braconidae) when attacking and developing in insecticide-resistant hosts. Biocontrol Science and Technology. 12, pp. 605-614.

The variational expression of Bt proteins within transgenic canola and its movement through trophic levels

C2 - Non-edited contributions to conferences

Wei, W., Schuler, T. H., Clark, S. J., Stewart, C. N. and Poppy, G. M. 2002. The variational expression of Bt proteins within transgenic canola and its movement through trophic levels. Abstracts 7th International Symposium on the Biosafety of Genetically Modified Organisms, Beijing, 10-16 October 2002 .

Parasitoid interactions between crop and margin habitat

C2 - Non-edited contributions to conferences

Powell, W. 2002. Parasitoid interactions between crop and margin habitat. Abstracts 7th European Congress of Entomology, Thessaloniki, 7-13 October 2002 . pp. 61

Design, analysis and power considerations of field-scale ecological assessments of genetically modified crops

C2 - Non-edited contributions to conferences

Perry, J. N., Rothery, P., Clark, S. J., Heard, M. S. and Hawes, C. 2002. Design, analysis and power considerations of field-scale ecological assessments of genetically modified crops. Abstracts ESF Workshop on Ecological Concepts and Techniques to Assess the Impact of Genetically Modified Plants in Natural and Crop Ecosystems, Klarskovgard, 1-2 November 2002 . pp. 20

Spatial pattern in the distribution of pests and yield in an oilseed rape crop: implications for ICM

C1 - Edited contributions to conferences/learned societies

Ferguson, A. W., Perry, J. N., Williams, I. H., Klukowski, Z., Walczak, B., Clark, S. J. and Mugglestone, M. A. 2002. Spatial pattern in the distribution of pests and yield in an oilseed rape crop: implications for ICM. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2002 . pp. 659-664

Spatial patterns of insect pest distribution in an oilseed rape crop: relationships to plant growth and yield and significance for IPM

C2 - Non-edited contributions to conferences

Ferguson, A. W., Klukowski, Z., Walczak, B., Clark, S. J., Mugglestone, M. A., Perry, J. N. and Williams, I. H. 2002. Spatial patterns of insect pest distribution in an oilseed rape crop: relationships to plant growth and yield and significance for IPM. Abstracts 7th European Congress of Entomology, Thessaloniki, 7-13 October 2002 . pp. 207

Spatial pattern and the relationship between pests and plant growth in a winter oilseed rape crop

C2 - Non-edited contributions to conferences

Ferguson, A. W., Klukowski, Z., Walczak, B., Clark, S. J., Mugglestone, M. A., Perry, J. N. and Williams, I. H. 2002. Spatial pattern and the relationship between pests and plant growth in a winter oilseed rape crop. Abstracts 6th National Meeting of the Royal Entomological Society, Cardiff, 12-13 September 2002 . pp. 15-16

Identification of non-host plant volatiles repellent to pollen beetles

C2 - Non-edited contributions to conferences

Stevenson, A. L., Birkett, M. A., Woodcock, C. M., Pickett, J. A., Osborne, J. L. and Powell, W. 2002. Identification of non-host plant volatiles repellent to pollen beetles. Abstracts 19th Annual Meeting of the International Society of Chemical Ecology, Hamburg, 3-8 August 2002 .

A tiered approach for evaluating Erynia neoaphidis isolates against seven aphid species

C2 - Non-edited contributions to conferences

Shah, P. A., Clark, S. J. and Pell, J. K. 2002. A tiered approach for evaluating Erynia neoaphidis isolates against seven aphid species. Abstracts 35th Annual Meeting of the Society for Invertebrate Pathology, Foz do Iguassu, Brazil, 18-23 August 2002 . pp. 104

Design and analysis of farm-scale evaluations of genetically modified herbicide-tolerant crops

C1 - Edited contributions to conferences/learned societies

Rothery, P., Clark, S. J. and Perry, J. N. 2002. Design and analysis of farm-scale evaluations of genetically modified herbicide-tolerant crops. Proceedings 21st International Biometric Conference, Freiburg, 21-26 July 2002 . pp. 351-364

Bioassays to assess the pathogenicity of mitosporic fungi to Varroa destructor (sp. nov), an ectoparasitic mite of the honey bee, Apis mellifera

C2 - Non-edited contributions to conferences

Shaw, K. E., Davidson, G., Clark, S. J., Ball, B. V., Pell, J. K., Chandler, D. and Sunderland, K. 2001. Bioassays to assess the pathogenicity of mitosporic fungi to Varroa destructor (sp. nov), an ectoparasitic mite of the honey bee, Apis mellifera. Abstracts 34th Annual Meeting of the Society for Invertebrate Pathology, Noordwijkerhout, 25-30 August 2001 .

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 31 January 2001

D1 - Technical reports: non-confidential

Firbank, L. G., Bater, J., Bennett, S., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Norton, L., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rossall, M., Rothery, P., Roy, D., Scott, R., Squire, G., Watkins, J., Whittaker, D. and Woiwod, I. P. 2001. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 31 January 2001.

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 11 October 2001

D1 - Technical reports: non-confidential

Firbank, L. G., Bennett, S., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Haughton, A. J., Hawes, C., Heard, M., Hill, M., May, M. J., Norton, L., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rothery, P., Roy, D., Scott, R., Squire, G., Watkins, J., Whittaker, D. and Woiwod, I. P. 2001. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 11 October 2001.

Comparison of the use of two nematode-trapping fungi in the control of Haemonchus contortus infective larvae in ovine faeces

A - Papers appearing in refereed journals

Flores Crespo, J., Mendoza De Gives, P., Herrera Rodriguez, D., Liebano Hernandez, E., Vazquez Prats, V. and Clark, S. J. 2001. Comparison of the use of two nematode-trapping fungi in the control of Haemonchus contortus infective larvae in ovine faeces. International journal of nematology. 11, pp. 253-259.

Are fecundity and longevity of female Aphelinus abdominalis affected by development in GNA-dosed Macrosiphum euphorbiae?

A - Papers appearing in refereed journals

Couty, A., Clark, S. J. and Poppy, G. M. 2001. Are fecundity and longevity of female Aphelinus abdominalis affected by development in GNA-dosed Macrosiphum euphorbiae? Physiological Entomology. 26 (4), pp. 287-293. https://doi.org/10.1046/j.0307-6962.2001.00248.x

Can aphid-induced plant signals be transmitted aerially and through the rhizosphere?

A - Papers appearing in refereed journals

Chamberlain, K., Guerrieri, E., Pennacchio, F., Pettersson, J., Pickett, J. A., Poppy, G. M., Powell, W., Wadhams, L. J. and Woodcock, C. M. 2001. Can aphid-induced plant signals be transmitted aerially and through the rhizosphere? Biochemical Systematics And Ecology. 29, pp. 1063-1074.

The effect of natural enemies on the spread of barley yellow dwarf virus (BYDV) by Rhopalosiphum padi (Hemiptera: Aphididae)

A - Papers appearing in refereed journals

Smyrnioudis, I. N., Harrington, R., Clark, S. J. and Katis, N. 2001. The effect of natural enemies on the spread of barley yellow dwarf virus (BYDV) by Rhopalosiphum padi (Hemiptera: Aphididae). Bulletin of Entomological Research. 91 (4), pp. 301-306. https://doi.org/10.1079/BER2001110

Population-scale laboratory studies of the effect of transgenic plants on nontarget insects

A - Papers appearing in refereed journals

Schuler, T. H., Denholm, I., Jouanin, L., Clark, S. J., Clark, A. J. and Poppy, G. M. 2001. Population-scale laboratory studies of the effect of transgenic plants on nontarget insects. Molecular Ecology. 10 (7), pp. 1845-1853. https://doi.org/10.1046/j.0962-1083.2001.01309.x

Comparison of two field-scale approaches for the study of effects of insecticides on polyphagous predators in cereals

A - Papers appearing in refereed journals

Kennedy, P. J., Conrad, K. F., Perry, J. N., Powell, D., Aegerter, J., Todd, A. D., Walters, K. F. A. and Powell, W. 2001. Comparison of two field-scale approaches for the study of effects of insecticides on polyphagous predators in cereals. Applied Soil Ecology. 17 (3), pp. 253-266. https://doi.org/10.1016/S0929-1393(01)00142-1

Conidial discharge in the aphid pathogen Erynia neoaphidis

A - Papers appearing in refereed journals

Hemmati, F., Pell, J. K., McCartney, H. A., Clark, S. J. and Deadman, M. L. 2001. Conidial discharge in the aphid pathogen Erynia neoaphidis. Mycological Research. 105 (6), pp. 715-722. https://doi.org/10.1017/S0953756201004014

The effect of temperature on variation in transmission of a BYDV PAV-like isolate by clones of Rhopalosiphum padi and Sitobion avenae

A - Papers appearing in refereed journals

Smyrnioudis, I. N., Harrington, R., Hall, M. J., Katis, N. and Clark, S. J. 2001. The effect of temperature on variation in transmission of a BYDV PAV-like isolate by clones of Rhopalosiphum padi and Sitobion avenae. European Journal of Plant Pathology. 107, pp. 167-173.

Direct and indirect sublethal effects of Galanthus nivalis agglutinin (GNA) on the development of a potato-aphid parasitoid, Aphelinus abdominalis (Hymenoptera: Aphelinidae)

A - Papers appearing in refereed journals

Couty, A., De La Vina, G., Clark, S. J., Kaiser, L., Pham-Delegue, M-H. and Poppy, G. M. 2001. Direct and indirect sublethal effects of Galanthus nivalis agglutinin (GNA) on the development of a potato-aphid parasitoid, Aphelinus abdominalis (Hymenoptera: Aphelinidae). Journal of Insect Physiology. 47 (6), pp. 553-561. https://doi.org/10.1016/S0022-1910(00)00148-7

Repellency of non-host plants to oilseed rape pests

C2 - Non-edited contributions to conferences

Stevenson, A. L., Osborne, J. L. and Powell, W. 2001. Repellency of non-host plants to oilseed rape pests. Abstracts British Ecological Society Winter Meeting, Birmingham, 3-5 January 2001 . pp. 56

Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 20 October 2000

D1 - Technical reports: non-confidential

Firbank, L. G., Bater, J., Bennett, S., Brooks, D., Bohan, D. A., Champion, G. T., Clark, S. J., Daniels, R., Dewar, A. M., Glen, D. M., Haughton, A. J., Hawes, C., Heard, M., Hill, M., Maudsley, M. J., Marshall, E. J. P., May, M. J., Norton, L., Osborne, J. L., Pidgeon, J. D., Perry, J. N., Rossall, M., Rothery, P., Roy, D., Scott, R., Squire, G., Watkins, J., Whittaker, D. and Woiwod, I. P. 2000. Farm scale evaluations of GM crops: effects of the management of field scale releases of genetically-modified herbicide-tolerant crops on the abundance and diversity of farmland wildlife. Interim report 20 October 2000. Department for Environment, Food & Rural Affairs (DEFRA).

A simple sequence repeat-based linkage map of barley

A - Papers appearing in refereed journals

Ramsay, L., Macaulay, M., Degli Ivanissevich, S., Maclean, K., Cardle, L., Fuller, J., Edwards, K. J., Tuvesson, S., Morgante, M., Massari, A., Maestri, E., Marmiroli, N., Sjakste, T., Ganal, M., Powell, W. and Waugh, R. 2000. A simple sequence repeat-based linkage map of barley. Genetics. 156, pp. 1997-2005.

The use of field margins in the manipulation of parasitoids for aphid control in arable crops

C1 - Edited contributions to conferences/learned societies

Powell, W. 2000. The use of field margins in the manipulation of parasitoids for aphid control in arable crops. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 2000 . pp. 579-584

Aphid-induced plant volatiles influencing parasitoid behaviour

C2 - Non-edited contributions to conferences

Poppy, G. M., Powell, W., Guerrieri, E. and Pennacchio, F. 2000. Aphid-induced plant volatiles influencing parasitoid behaviour. Abstract Book 1: 21st International Congress of Entomology, Foz do Iguassu, Brazil, 20-26 August 2000 .

Host selection strategies by the aphid parasitoid Aphidius ervi

C2 - Non-edited contributions to conferences

Pennacchio, F., Battaglia, D., Guerrieri, E., Poppy, G. M., Powell, W., Romano, A. and Tranfaglia, A. 2000. Host selection strategies by the aphid parasitoid Aphidius ervi. Abstracts Book 1: 21st International Congress of Entomology, Foz do Iguassu, Brazil, 20-26 August 2000 .

Principles for regulatory testing and interpretation of semi-field and field studies with non-target arthropods

A - Papers appearing in refereed journals

Candolfi, M., Bigler, F., Campbell, P., Heimbach, U., Schmuck, R., Angeli, G., Bakker, F., Brown, K., Carli, G., Dinter, A., Forti, D., Forster, R., Gathmann, A., Hassan, S., Mead-Briggs, M., Melandri, M., Neuwmann, P., Pasqualini, E., Powell, W., Reboulet, J-N., Romijn, K., Sechser, B., Thieme, Ufer, A., Vergnet, Ch. and Vogt, H. 2000. Principles for regulatory testing and interpretation of semi-field and field studies with non-target arthropods. Anzeiger fur Schadlingskunde/Journal of Pest Science. 73 (6), pp. 141-147.

Movement of aphid parasitoids over different spatial scales studied using molecular markers

C2 - Non-edited contributions to conferences

Loxdale, H. D., Brookes, C. P. and Powell, W. 2000. Movement of aphid parasitoids over different spatial scales studied using molecular markers. Abstracts 21st International Congress of Entomology, Foz de Iguassu, Brazil, 20-26 August 2000 . pp. 2

Fitting host-parasitoid models with CV2>1 using hierarchical generalized linear models

A - Papers appearing in refereed journals

Perry, J. N., Noh, M. S., Lee, Youngsook, Alston, R. D., Mohd Norowi, H., Powell, W. and Rennolls, K. 2000. Fitting host-parasitoid models with CV2>1 using hierarchical generalized linear models. Proceedings of the Royal Society of London Series B Biological Sciences. 267, pp. 2043-2048.

The effect of drought stress and temperature on spread of barley yellow dwarf virus (BYDV)

A - Papers appearing in refereed journals

Smyrnioudis, I. N., Harrington, R., Katis, N. and Clark, S. J. 2000. The effect of drought stress and temperature on spread of barley yellow dwarf virus (BYDV). Agricultural and Forest Entomology. 2, pp. 161-166.

Physical and chemical cues influencing the oviposition behaviour of Aphidius ervi

A - Papers appearing in refereed journals

Battaglia, D., Poppy, G. M., Powell, W., Romano, A., Tranfaglia, A. and Pennacchio, F. 2000. Physical and chemical cues influencing the oviposition behaviour of Aphidius ervi. Entomologia Experimentalis et Applicata. 94 (3), pp. 219-227. https://doi.org/10.1046/j.1570-7458.2000.00623.x

The role of plant chemical cues in determining host preference in the generalist aphid parasitoid Aphidius colemani

A - Papers appearing in refereed journals

Storeck, A., Poppy, G. M., Van Emden, H. F. and Powell, W. 2000. The role of plant chemical cues in determining host preference in the generalist aphid parasitoid Aphidius colemani. Entomologia Experimentalis et Applicata. 97 (1), pp. 41-46. https://doi.org/10.1046/j.1570-7458.2000.00714.x

The spatio-temporal distribution of adult Ceutorhynchus assimilis in a crop of winter oilseed rape in relation to the distribution of their larvae and that of the parasitoid Trichomalus perfectus

A - Papers appearing in refereed journals

Ferguson, A. W., Klukowski, Z., Walczak, B., Perry, J. N., Mugglestone, M. A., Clark, S. J. and Williams, I. H. 2000. The spatio-temporal distribution of adult Ceutorhynchus assimilis in a crop of winter oilseed rape in relation to the distribution of their larvae and that of the parasitoid Trichomalus perfectus. Entomologia Experimentalis et Applicata. 95 (2), pp. 161-171. https://doi.org/10.1046/j.1570-7458.2000.00654.x

The effect of spatial scale on interactions between two weevils and their parasitoid

A - Papers appearing in refereed journals

Mohd Norowi, Hamid, Perry, J. N., Powell, W. and Rennolls, K. 2000. The effect of spatial scale on interactions between two weevils and their parasitoid. Ecological Entomology. 25 (2), pp. 188-196. https://doi.org/10.1046/j.1365-2311.2000.00242.x

Generalized estimating equations for spatially referenced binary data

C2 - Non-edited contributions to conferences

Mugglestone, M. A., Kenward, J. G. and Clark, S. J. 2000. Generalized estimating equations for spatially referenced binary data. Proceedings Workshop on Correlated Data Modelling: the Estimating Function Approach, Trieste, Italy, 22-23 October 1999 .

Spatio-temporal associations in beetle and virus count data

A - Papers appearing in refereed journals

Korie, S., Perry, J. N., Mugglestone, M. A., Clark, S. J., Thomas, C. F. G. and Mohamad Roff, M. N. 2000. Spatio-temporal associations in beetle and virus count data. Journal of Agricultural Biological and Environmental Statistics. 5 (2), pp. 214-239. https://doi.org/10.2307/1400532

Spatio-temporal dynamics of insect distributions in oilseed rape

C1 - Edited contributions to conferences/learned societies

Williams, I. H., Murchie, A. K., Ferguson, A. W., Klukowski, Z., Perry, J. N., Walczak, B., Mugglestone, M. A. and Clark, S. J. 1999. Spatio-temporal dynamics of insect distributions in oilseed rape. Proceedings 10th International Rapeseed Congress: New Horizons for an Old Crop, Canberra, 26-29 September 1999. (CD-ROM) .

Parasitoid hosts

B - Book chapters etc edited externally

Powell, W. 1999. Parasitoid hosts. in: Hardie, J. and Minks, A. K. (ed.) Pheromones of non-lepidopteran insects associated with agricultural plants Wallingford, Oxon CAB International (CABI). pp. 405-427

Aphid-induced plant volatiles and the specific attraction of aphid parasitoids

C2 - Non-edited contributions to conferences

Poppy, G. M. and Powell, W. 1999. Aphid-induced plant volatiles and the specific attraction of aphid parasitoids. Abstracts 14th International Plant Protection Congress, Jerusalem, July 1999 .

Induction and systemic release of herbivore-induced plant volatiles mediating in-flight orientation of Aphidius ervi

A - Papers appearing in refereed journals

Guerrieri, E., Poppy, G. M., Powell, W., Tremblay, E. and Pennacchio, F. 1999. Induction and systemic release of herbivore-induced plant volatiles mediating in-flight orientation of Aphidius ervi. Journal of Chemical Ecology. 25, pp. 1247-1261.

Responses to aphid sex pheromones by the pea aphid parasitoids Aphidius ervi and Aphidius eadyi

A - Papers appearing in refereed journals

Glinwood, R. T., Du, Y-J. and Powell, W. 1999. Responses to aphid sex pheromones by the pea aphid parasitoids Aphidius ervi and Aphidius eadyi. Entomologia Experimentalis et Applicata. 92 (2), pp. 227-232. https://doi.org/10.1046/j.1570-7458.1999.00541.x

The effect of spatial scale on interactions between two weevils and their food plant

A - Papers appearing in refereed journals

Hamid, Mohd Norowi, Perry, J. N., Powell, W. and Rennolls, K. 1999. The effect of spatial scale on interactions between two weevils and their food plant. Acta Oecologica - International journal of ecology. 20, pp. 537-549.

A landscape-scale study of bumble bee foraging range and constancy, using harmonic radar

A - Papers appearing in refereed journals

Osborne, J. L., Clark, S. J., Morris, R. J., Williams, I. H., Riley, J. R., Smith, A. D., Reynolds, D. R. and Edwards, A. S. 1999. A landscape-scale study of bumble bee foraging range and constancy, using harmonic radar. Journal of Applied Ecology. 36 (4), pp. 519-533. https://doi.org/10.1046/j.1365-2664.1999.00428.x

The germination of oil-formulated conidia of the insect pathogen Metarhizium anisopliae

A - Papers appearing in refereed journals

Ibrahim, L., Butt, T. M., Beckett, A. and Clark, S. J. 1999. The germination of oil-formulated conidia of the insect pathogen Metarhizium anisopliae. Mycological Research. 103 (7), pp. 901-907. https://doi.org/10.1017/S0953756298007849

Perception of oviposition-deterring pheromone by cabbage seed weevil (Ceutorhynchus assimilis )

A - Papers appearing in refereed journals

Ferguson, A. W., Ziesmann, J., Blight, M. M., Williams, I. H., Wadhams, L. J., Clark, S. J., Woodcock, C. M. and Mudd, A. 1999. Perception of oviposition-deterring pheromone by cabbage seed weevil (Ceutorhynchus assimilis ). Journal of Chemical Ecology. 25, pp. 1655-1670.

Identification of the gland secreting oviposition-deterring pheromone in the cabbage seed weevil, Ceutorhynchus assimilis, and the mechanism of pheromone deposition

A - Papers appearing in refereed journals

Ferguson, A. W., Solinas, M., Ziesmann, J., Isidoro, N., Williams, I. H., Scubla, P., Mudd, A., Clark, S. J. and Wadhams, L. J. 1999. Identification of the gland secreting oviposition-deterring pheromone in the cabbage seed weevil, Ceutorhynchus assimilis, and the mechanism of pheromone deposition. Journal of Insect Physiology. 45 (7), pp. 687-699. https://doi.org/10.1016/S0022-1910(99)00046-3

Aphids, predators and parasitoids

C1 - Edited contributions to conferences/learned societies

Wadhams, L. J., Birkett, M. A., Powell, W. and Woodcock, C. M. 1999. Aphids, predators and parasitoids. Goode, J. A. and Chadwick, D. J. (ed.) Insect-plant Interactions and Induced Plant Defence. Novartis Foundation Symposium 223 . John Wiley & Sons Chichester, West Sussex. pp. 60-73

Comparative responses of parasitoids to synthetic and plant-extracted nepetalactone component of aphid sex pheromones

A - Papers appearing in refereed journals

Glinwood, R. T., Du, Y-J., Smiley, D. W. M. and Powell, W. 1999. Comparative responses of parasitoids to synthetic and plant-extracted nepetalactone component of aphid sex pheromones. Journal of Chemical Ecology. 25, pp. 1481-1488.

Predatory behaviour of trapping fungi against srf mutants of Caenorhabditis elegans and different plant and animal parasitic nematodes

A - Papers appearing in refereed journals

Mendoza De Gives, P., Davies, K. G., Clark, S. J. and Behnke, J. M. 1999. Predatory behaviour of trapping fungi against srf mutants of Caenorhabditis elegans and different plant and animal parasitic nematodes. Parasitology. 119 (1), pp. 95-104. https://doi.org/10.1017/S0031182099004424

Spatial aspects in modelling pest-crop interactions

C1 - Edited contributions to conferences/learned societies

Mohd Norowi, H., Perry, J. N., Powell, W. and Rennolls, K. 1999. Spatial aspects in modelling pest-crop interactions. Proceedings 5th International Conference on Plant Protection in the Tropics, Kuala Lumpur, 15-18 March 1999 . Malaysian Plant Protection Society, Kuala Lumpur, Malaysia. pp. 29-34

Aphid sex pheromones: manipulation of beneficial insects for aphid population control

C1 - Edited contributions to conferences/learned societies

Glinwood, R. T., Smiley, D. W. M., Hardie, J., Pickett, J. A., Powell, W., Wadhams, L. J. and Woodcock, C. M. 1999. Aphid sex pheromones: manipulation of beneficial insects for aphid population control. Wiley.

Use of lichen secondary metabolites as antifeedants to protect higher plants from damage caused by slug feeding

A - Papers appearing in refereed journals

Clark, S. J., Henderson, I. F., Hill, D. J. and Martin, A. P. 1999. Use of lichen secondary metabolites as antifeedants to protect higher plants from damage caused by slug feeding. Annals of Applied Biology - AAB. 134 (1), pp. 101-108. https://doi.org/10.1111/j.1744-7348.1999.tb05240.x

Rejoinder [Analyzing maps of dispersal around a single focus]

A - Papers appearing in refereed journals

Korie, S., Clark, S. J., Perry, J. N., Mugglestone, M. A., Bartlett, P. W., Marshall, E. J. P. and Mann, J. A. 1998. Rejoinder [Analyzing maps of dispersal around a single focus]. Environmental And Ecological Statistics. 5 (4), pp. 349-351. https://doi.org/10.1023/A%3A1009604509368

Analyzing maps of dispersal around a single focus

A - Papers appearing in refereed journals

Korie, S., Clark, S. J., Perry, J. N., Mugglestone, M. A., Bartlett, P. W., Marshall, E. J. P. and Mann, J. A. 1998. Analyzing maps of dispersal around a single focus. Environmental And Ecological Statistics. 5 (4), pp. 317-344. https://doi.org/10.1023/A%3A1009603804998

Aphid sex pheromones: manipulation of beneficial insects for aphid population control

C2 - Non-edited contributions to conferences

Glinwood, R., Smiley, D. W. M., Hardie, J., Pickett, J. A., Powell, W., Wadhams, L. J. and Woodcock, C. M. 1998. Aphid sex pheromones: manipulation of beneficial insects for aphid population control. Abstracts 9th International Congress on Pesticide Chemistry: the Food-Environment Challenge, London, 2-7 August 1998 . pp. 3D-002

Assessment of risks posed by pesticides to non-target arthropods

C2 - Non-edited contributions to conferences

Birnie, L. C., Kennedy, P. J., Shaw, K. E., Denholm, I., Perry, J. N. and Powell, W. 1998. Assessment of risks posed by pesticides to non-target arthropods. Abstracts 9th International Congress on Pesticide Chemistry: the Food-Environment Challenge, London, 2-7 August 1998 . pp. 8B-025

Unseasonal male aphids

C1 - Edited contributions to conferences/learned societies

Taylor, M. S., Harrington, R. and Clark, S. J. 1998. Unseasonal male aphids. Dixon, A. F. G. and Nietonafria, J. M. (ed.) Aphids in natural and managed ecosystems . Universidad de Leon, Leon. pp. 287-293

Pest control by a community of natural enemies

C1 - Edited contributions to conferences/learned societies

Sunderland, K. D., Axelsen, J. A., Dromph, K., Freier, B., Hemptinne, J-L., Holst, N. H., Mols, P. J. M., Petersen, M. K., Powell, W., Ruggle, P., Triltsch, H. and Winder, L. 1998. Pest control by a community of natural enemies.

The complementary roles of laboratory and field testing in ecotoxicological risk assessment

C1 - Edited contributions to conferences/learned societies

Denholm, I., Birnie, L. C., Kennedy, P. J., Shaw, K. E., Perry, J. N. and Powell, W. 1998. The complementary roles of laboratory and field testing in ecotoxicological risk assessment. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 1998 . pp. 583-590

Direct and indirect effects of transgenic potatoes expressing the snowdrop lectin (GNA) on the aphid parasitoid, Aphidius ervi

C2 - Non-edited contributions to conferences

Couty, A., Poppy, G. M., Powell, W. and Gatehouse, A. M. R. 1998. Direct and indirect effects of transgenic potatoes expressing the snowdrop lectin (GNA) on the aphid parasitoid, Aphidius ervi. Abstracts 10th International Symposium on Insect-Plant Relationships, Oxford, 4-11 July 1998 . pp. 55

Aphid sex pheromones to enhance parasitoid efficiency (Home-Grown Cereals Authority Project Report No. 155)

D1 - Technical reports: non-confidential

Powell, W. and Glinwood, R. T. 1998. Aphid sex pheromones to enhance parasitoid efficiency (Home-Grown Cereals Authority Project Report No. 155). H-GCA, London.

Implications of predator foraging on aphid pathogen dynamics

A - Papers appearing in refereed journals

Roy, H. E., Pell, J. K., Clark, S. J. and Alderson, P. G. 1998. Implications of predator foraging on aphid pathogen dynamics. Journal of Invertebrate Pathology. 71, pp. 236-247.

The effect of plant growth and topography on the acquisition of conidia of the insect pathogen Metarhizium anisopliae by larvae of Phaedon cochleariae

A - Papers appearing in refereed journals

Inyang, E. N., Butt, T. M., Ibrahim, L., Clark, S. J., Pye, B. T., Beckett, A. and Archer, S. 1998. The effect of plant growth and topography on the acquisition of conidia of the insect pathogen Metarhizium anisopliae by larvae of Phaedon cochleariae. Mycological Research. 102 (11), pp. 1365-1374. https://doi.org/10.1017/S095375629800673X

Use of a novel sporulation monitor to quantify the effects of formulation and storage on conidiation by dried mycelia of the entomopathogenic fungus Zoophthora radicans

A - Papers appearing in refereed journals

Pell, J. K., Barker, A. D. P., Clark, S. J., Wilding, N. and Alderson, P. G. 1998. Use of a novel sporulation monitor to quantify the effects of formulation and storage on conidiation by dried mycelia of the entomopathogenic fungus Zoophthora radicans. Biocontrol Science and Technology. 8, pp. 13-21.

Semiochemicals to increase parasitism in aphid pest control

C1 - Edited contributions to conferences/learned societies

Powell, W. 1998. Semiochemicals to increase parasitism in aphid pest control. Wiley. https://doi.org/10.1002/(SICI)1096-9063(1998110)54:3<291::AID-PS804>3.0.CO;2-9

Increased parasitization of aphids on trap plants alongside vials releasing synthetic aphid sex pheromone and effective range of the pheromone

A - Papers appearing in refereed journals

Glinwood, R. T., Powell, W. and Tripathi, C. P. M. 1998. Increased parasitization of aphids on trap plants alongside vials releasing synthetic aphid sex pheromone and effective range of the pheromone. Biocontrol Science and Technology. 8 (4), pp. 607-614. https://doi.org/10.1080/09583159830126

Identification of semiochemicals released during aphid feeding that attract parasitoid Aphidius ervi

A - Papers appearing in refereed journals

Du, Y., Poppy, G. M., Powell, W., Pickett, J. A., Wadhams, L. J. and Woodcock, C. M. 1998. Identification of semiochemicals released during aphid feeding that attract parasitoid Aphidius ervi. Journal of Chemical Ecology. 24, pp. 1355-1368.

Genetic variability within and between English populations of the damson-hop aphid Phorodon humili (Hemiptera: Aphididae) with special reference to esterases associated with insecticide resistance

A - Papers appearing in refereed journals

Loxdale, H. D., Brookes, C. P., Wynne, I. R. and Clark, S. J. 1998. Genetic variability within and between English populations of the damson-hop aphid Phorodon humili (Hemiptera: Aphididae) with special reference to esterases associated with insecticide resistance. Bulletin of Entomological Research. 88 (5), pp. 513-526. https://doi.org/10.1017/S0007485300026031

Strategies involved in the location of hosts by the parasitoid Aphidius ervi Haliday (Hymenoptera: Braconidae: Aphidiinae)

A - Papers appearing in refereed journals

Powell, W., Pennacchio, F., Poppy, G. M. and Tremblay, E. 1998. Strategies involved in the location of hosts by the parasitoid Aphidius ervi Haliday (Hymenoptera: Braconidae: Aphidiinae). Biological Control. 11, pp. 104-112.

Electrophoretic study of five aphid parasitoid species of the genus Aphidius (Hymenoptera: Braconidae), including evidence for reproductively isolated sympatric populations and a cryptic species

A - Papers appearing in refereed journals

Atanassova, P., Brookes, C. P., Loxdale, H. D. and Powell, W. 1998. Electrophoretic study of five aphid parasitoid species of the genus Aphidius (Hymenoptera: Braconidae), including evidence for reproductively isolated sympatric populations and a cryptic species. Bulletin of Entomological Research. 88 (1), pp. 3-13. https://doi.org/10.1017/S000748530004150X

The use of single-species spatially explicit models

C1 - Edited contributions to conferences/learned societies

Topping, C. J., Booij, K., Daamen, R. A., Dinter, A., Heimbach, U., Kennedy, P. J., Langer, V., Perry, J. N., Powell, W., Skirvin, D., Stilmant, D., Thomas, C. F. G. and Winstone, L. 1997. The use of single-species spatially explicit models.

Temperature change and complex dynamics

A - Papers appearing in refereed journals

Zhou, X-L, Perry, J. N., Woiwod, I. P., Harrington, R., Bale, J. S. and Clark, S. J. 1997. Temperature change and complex dynamics. Oecologia. 112 (4), pp. 543-550. https://doi.org/10.1007/s004420050343

Influence of pesticide use on the natural occurrence of entomopathogenic fungi in arable soils in the U.K.: field and laboratory comparisons

A - Papers appearing in refereed journals

Mietkiewski, R. T., Pell, J. K. and Clark, S. J. 1997. Influence of pesticide use on the natural occurrence of entomopathogenic fungi in arable soils in the U.K.: field and laboratory comparisons. Biocontrol Science and Technology. 7, pp. 565-575.

Herbivore-induced synomones regulating the flight behaviour of the aphid parasitoid Aphidius ervi (Hymenoptera: Braconidae)

C2 - Non-edited contributions to conferences

Poppy, G. M., Guerrieri, E., Powell, W., Pennacchio, F. and Tremblay, E. 1997. Herbivore-induced synomones regulating the flight behaviour of the aphid parasitoid Aphidius ervi (Hymenoptera: Braconidae). Abstracts 6th European Workshop on Insect Parasitoids, Valencia, March 1997 .

Aphid-induced plant synomones affecting the foraging behaviour of the parasitoid Aphidius ervi

C2 - Non-edited contributions to conferences

Poppy, G. M., Guerrieri, E., Powell, W. and Pennacchio, F. 1997. Aphid-induced plant synomones affecting the foraging behaviour of the parasitoid Aphidius ervi. Abstracts Entomology '97, Newcastle, 10-12 September 1997 .

Physical and chemical cues regulating the oviposition behaviour of Aphidius ervi Haliday (Hymenoptera: Braconidae)

C2 - Non-edited contributions to conferences

Battaglia, D., Pennacchio, F., Poppy, G. M., Powell, W., Romano, A. and Tranfaglia, A. 1997. Physical and chemical cues regulating the oviposition behaviour of Aphidius ervi Haliday (Hymenoptera: Braconidae). Abstracts 6th European Workshop on Insect Parasitoids, Valencia, March 1997 .

Chemically mediated associative learning in the host foraging behavior of the aphid parasitoid Aphidius ervi (Hymenoptera: Braconidae)

A - Papers appearing in refereed journals

Du, Y., Poppy, G. M., Powell, W. and Wadhams, L. J. 1997. Chemically mediated associative learning in the host foraging behavior of the aphid parasitoid Aphidius ervi (Hymenoptera: Braconidae). Journal of Insect Behavior. 10, pp. 509-522.

Evidence for a possible fitness trade-off between insecticide resistance and the low temperature movement that is essential for survival of UK populations of Myzus persicae (Hemiptera: Aphididae)

A - Papers appearing in refereed journals

Foster, S. P., Harrington, R., Devonshire, A. L., Denholm, I., Clark, S. J. and Mugglestone, M. A. 1997. Evidence for a possible fitness trade-off between insecticide resistance and the low temperature movement that is essential for survival of UK populations of Myzus persicae (Hemiptera: Aphididae). Bulletin of Entomological Research. 87 (6), pp. 573-579. https://doi.org/10.1017/S0007485300038669

Aphid parasitoid responses to semiochemicals - genetic, conditioned or learnt?

A - Papers appearing in refereed journals

Poppy, G. M., Powell, W. and Pennacchio, F. 1997. Aphid parasitoid responses to semiochemicals - genetic, conditioned or learnt? Entomophaga. 42, pp. 193-199.

Sublethal effects of pesticides on locomotory behaviour of beneficial arthropods

C1 - Edited contributions to conferences/learned societies

Kennedy, P. J., Umoru, P. A. and Powell, W. 1997. Sublethal effects of pesticides on locomotory behaviour of beneficial arthropods. Haskell, P. T. and McEwen, P. K. (ed.) New studies in ecotoxicology . Welsh Pest Management Forum. pp. 37-41

Extraction, isolation and composition of oviposition-deterring secretion of cabbage seed weevil Ceutorhynchus assimilis

A - Papers appearing in refereed journals

Mudd, A., Ferguson, A. W., Blight, M. M., Williams, I. H., Scubla, P., Solinas, M. and Clark, S. J. 1997. Extraction, isolation and composition of oviposition-deterring secretion of cabbage seed weevil Ceutorhynchus assimilis. Journal of Chemical Ecology. 23, pp. 2227-2240.

A bioassay for screening materials influencing feeding in the field slug Deroceras reticulatum (Müller) (Mollusca: Pulmonata)

A - Papers appearing in refereed journals

Clark, S. J., Dodds, C. J., Henderson, I. F. and Martin, A. P. 1997. A bioassay for screening materials influencing feeding in the field slug Deroceras reticulatum (Müller) (Mollusca: Pulmonata). Annals of Applied Biology - AAB. 130 (2), pp. 379-385. https://doi.org/10.1111/j.1744-7348.1997.tb06841.x

'Push-Pull' strategies for pest control

G - Articles in popular magazines and other technical publications

Smart, L. E., Pickett, J. A. and Powell, W. 1997. 'Push-Pull' strategies for pest control. Grain Legumes. No. 15, pp. 14-15.

The occurrence of aphid parasitoids in arable crops in northern Pakistan

C2 - Non-edited contributions to conferences

Rehman, A., Powell, W., Deadman, M. L. and Hashmi, A. A. 1997. The occurrence of aphid parasitoids in arable crops in northern Pakistan. Abstracts 3rd International Congress of Entomological Sciences, Islamabad, 18-20 March 1997 .

Detecting chaotic dynamics of insect populations from long-term survey data

A - Papers appearing in refereed journals

Zhou, X-L, Perry, J. N., Woiwod, I. P., Harrington, R., Bale, J. S. and Clark, S. J. 1997. Detecting chaotic dynamics of insect populations from long-term survey data. Ecological Entomology. 22 (2), pp. 231-241. https://doi.org/10.1046/j.1365-2311.1997.00049.x

Interactions between two aphid natural enemies, the entomopathogenic fungus Erynia neoaphidis Remaudiere & Hennebert (Zygomycetes: Entomophthorales) and the predatory beetle Coccinella septempunctata L. (Coleoptera: Coccinellidae)

A - Papers appearing in refereed journals

Pell, J. K., Pluke, R., Clark, S. J., Kenward, M. G. and Alderson, P. G. 1997. Interactions between two aphid natural enemies, the entomopathogenic fungus Erynia neoaphidis Remaudiere & Hennebert (Zygomycetes: Entomophthorales) and the predatory beetle Coccinella septempunctata L. (Coleoptera: Coccinellidae). Journal of Invertebrate Pathology. 69, pp. 261-268.

Nectar and flower production in Vicia faba L. (field bean) at ambient and elevated carbon dioxide

A - Papers appearing in refereed journals

Osborne, J. L., Awmack, C. S., Clark, S. J., Williams, I. H. and Mills, V. C. 1997. Nectar and flower production in Vicia faba L. (field bean) at ambient and elevated carbon dioxide. Apidologie. 28, pp. 43-55. https://doi.org/10.1051/apido:19970105

Influence of wheat and oat cultivars on the development of the cereal aphid parasitoid Aphidius rhopalosiphi and the generalist aphid parasitoid Ephedrus plagiator

A - Papers appearing in refereed journals

Fuentes-Contreras, J. E., Powell, W., Wadhams, L. J., Pickett, J. A. and Niemeyer, H. M. 1996. Influence of wheat and oat cultivars on the development of the cereal aphid parasitoid Aphidius rhopalosiphi and the generalist aphid parasitoid Ephedrus plagiator. Annals of Applied Biology - AAB. 128 (2), pp. 181-187. https://doi.org/10.1111/j.1744-7348.1996.tb05742.x

Host preference behaviour of the aphid parasitoids Praon volucre and Praon myzophagum (Hymenoptera: Aphidiidae)

C2 - Non-edited contributions to conferences

Rehman, A., Powell, W. and Deadman, M. L. 1996. Host preference behaviour of the aphid parasitoids Praon volucre and Praon myzophagum (Hymenoptera: Aphidiidae). Abstracts 2nd International Congress of Entomological Sciences, Islamabad, 19-21 March 1996 . pp. 69-70

Parasitoid responses to semiochemicals - innate, conditioned or learnt?

C2 - Non-edited contributions to conferences

Poppy, G. M., Powell, W. and Pennacchio, F. 1996. Parasitoid responses to semiochemicals - innate, conditioned or learnt? Proceedings Aphidophaga 6, Gembloux, 2-6 September 1996 .

The impact of climate change on aphid population dynamics and phenology

C2 - Non-edited contributions to conferences

Harrington, R., Perry, J. N., Woiwod, I. P., Zhou, X-L, Clark, S. J., Bale, J. S., Howling, G. G., Lisle, L. and Mair, J. 1996. The impact of climate change on aphid population dynamics and phenology. Proceedings BBSRC Conference on Biological Adaptation to Global Environmental Change, Lancaster, 9-11 September 1996 .

Reproduction of beneficial predators and parasitoids in agroecosystems in relation to habitat quality and food availability

A - Papers appearing in refereed journals

Sunderland, K. D., Bilde, T., Den Nijs, L. J. M. F., Dinter, A., Heimbach, U., Lys, J. A., Powell, W. and Toft, S. 1996. Reproduction of beneficial predators and parasitoids in agroecosystems in relation to habitat quality and food availability. Acta Jutlandica. 71(2), pp. 117-153.

Genetic influences on aphid parasitoid host selection

C2 - Non-edited contributions to conferences

Powell, W. and Rehman. A. 1996. Genetic influences on aphid parasitoid host selection.

Strategies involved in the location of hosts by the aphid parasitoid Aphidius ervi Halliday (Hymenoptera: Braconidae: Aphidiinae)

C2 - Non-edited contributions to conferences

Powell, W., Pennacchio, F., Poppy, G. M. and Tremblay, E. 1996. Strategies involved in the location of hosts by the aphid parasitoid Aphidius ervi Halliday (Hymenoptera: Braconidae: Aphidiinae). Proceedings 20th International Congress of Entomology, Firenze, 25-31 August 1996 . pp. 623

Nectar and flower production in Vicia faba L. (field bean) at elevated carbon dioxide

C2 - Non-edited contributions to conferences

Osborne, J. L., Awmack, C. S., Clark, S. J., Williams, I. H. and Mills, V. C. 1996. Nectar and flower production in Vicia faba L. (field bean) at elevated carbon dioxide. Abstracts 7th International Pollination Symposium, Lethbridge, Canada, 23-28 June 1996 .

The role of host-induced plant synomones on in-flight orientation of the aphid parasitoid Aphidius ervi Haliday (Hymenoptera, Braconidae)

C2 - Non-edited contributions to conferences

Guerrieri, E., Du, Y.J., Poppy, G. M., Powell, W., Pennacchio, F. and Tremblay, E. 1996. The role of host-induced plant synomones on in-flight orientation of the aphid parasitoid Aphidius ervi Haliday (Hymenoptera, Braconidae). Proceedings 20th International Congress of Entomology, Firenze, 25-31 August 1996 . pp. 647

Relative importance of semiochemicals from first and second trophic levels in host foraging behaviour of Aphidius ervi

A - Papers appearing in refereed journals

Du, Y.J., Poppy, G. M. and Powell, W. 1996. Relative importance of semiochemicals from first and second trophic levels in host foraging behaviour of Aphidius ervi. Journal of Chemical Ecology. 22, pp. 1591-1605.

Colour vision and oviposition behaviour in Aphidius ervi Haliday (Hymenoptera, Braconidae)

C2 - Non-edited contributions to conferences

Battaglia, D., Pennacchio, F., Romano, A., Tranfaglia, A., Poppy, G. M. and Powell, W. 1996. Colour vision and oviposition behaviour in Aphidius ervi Haliday (Hymenoptera, Braconidae). Proceedings 20th International Congress of Entomology, Firenze, 25-31 August 1996 . pp. 647

The foraging efficiency of the parasitoid Diaeretiella rapae (Hymenoptera: Braconidae) in relation to the spatial distribution of aphids on plants

A - Papers appearing in refereed journals

Powell, W. and Nickless, A. 1996. The foraging efficiency of the parasitoid Diaeretiella rapae (Hymenoptera: Braconidae) in relation to the spatial distribution of aphids on plants. Acta Jutlandica. 71(2), pp. 97-106.

Estimating Taylor's power law parameters for weeds and the effect of spatial scale

A - Papers appearing in refereed journals

Clark, S. J., Perry, J. N. and Marshall, E. J. P. 1996. Estimating Taylor's power law parameters for weeds and the effect of spatial scale. Weed Research. 36 (5), pp. 405-417. https://doi.org/10.1111/j.1365-3180.1996.tb01670.x

Sex pheromone of aphid parasitoid Praon volucre (Hymenoptera, Braconidae)

A - Papers appearing in refereed journals

Nazzi, F., Powell, W., Wadhams, L. J. and Woodcock, C. M. 1996. Sex pheromone of aphid parasitoid Praon volucre (Hymenoptera, Braconidae). Journal of Chemical Ecology. 22, pp. 1169-1175.

The effect of temperature and inoculation access period on the transmission of barley yellow dwarf virus by Rhopalosiphum padi (L.) and Sitobion avenae (F.)

A - Papers appearing in refereed journals

Lowles, A. J., Tatchell, G. M., Harrington, R. and Clark, S. J. 1996. The effect of temperature and inoculation access period on the transmission of barley yellow dwarf virus by Rhopalosiphum padi (L.) and Sitobion avenae (F.). Annals of Applied Biology - AAB. 128 (1), pp. 45-53. https://doi.org/10.1111/j.1744-7348.1996.tb07088.x

Feeding of the cabbage stem flea beetle Psylliodes chrysocephala on high and low glucosinolate cultivars of oilseed rape

A - Papers appearing in refereed journals

Bartlet, E., Mithen, R. and Clark, S. J. 1996. Feeding of the cabbage stem flea beetle Psylliodes chrysocephala on high and low glucosinolate cultivars of oilseed rape. Entomologia Experimentalis et Applicata. 80 (1), pp. 87-89.

Aphid attack - working on the insides

G - Articles in popular magazines and other technical publications

Powell, W. 1996. Aphid attack - working on the insides. Farming and Conservation. April 1996, pp. 12-14.

Impact of climate change on aphid flight phenology

C1 - Edited contributions to conferences/learned societies

Zhou, X-L, Harrington, R., Woiwod, I. P., Perry, J. N., Clark, S. J. and Bale, J. S. 1996. Impact of climate change on aphid flight phenology. Implications of "Global Environmental Change" for Crops in Europe. Aspects of Applied Biology 45 . pp. 299-305

Effect of pirimicarb on the foraging behaviour of Diaeretiella rapae (Hymenoptera: Braconidae) on host-free and infested oilseed rape plants

A - Papers appearing in refereed journals

Umoru, P. A., Powell, W. and Clark, S. J. 1996. Effect of pirimicarb on the foraging behaviour of Diaeretiella rapae (Hymenoptera: Braconidae) on host-free and infested oilseed rape plants. Bulletin of Entomological Research. 86 (2), pp. 193-201. https://doi.org/10.1017/S0007485300052445

Fatal attraction

G - Articles in popular magazines and other technical publications

Powell, W. 1995. Fatal attraction. Grower. 124(5), pp. 17-18.

Interactions between the cabbage seed weevil (Ceutorhynchus assimilis Payk.) and the brassica pod midge (Dasineura brassicae Winn.) infesting oilseed rape pods

C1 - Edited contributions to conferences/learned societies

Ferguson, A. W., Kenward, M. G., Williams, I. H., Clark, S. J., Kelm, M. and Dudzic, A. 1995. Interactions between the cabbage seed weevil (Ceutorhynchus assimilis Payk.) and the brassica pod midge (Dasineura brassicae Winn.) infesting oilseed rape pods. Rapeseed Today and Tomorrow. Proceedings 9th International Rapeseed Congress, Cambridge, 4-7 July 1995 . pp. 679-681

Populations and communities

B - Book chapters etc edited externally

Powell, W. and Walton, M. P. 1995. Populations and communities. in: Jervis, M. A. and Kidd, N. (ed.) Insect natural enemies: practical approaches to their study and evaluation Chapman & Hall, London. pp. 223-292

Influence of temperature on germination of primary and secondary conidia of Erynia neoaphidis (Zygomycetes: Entomophthorales)

A - Papers appearing in refereed journals

Morgan, L. W., Boddy, L., Clark, S. J. and Wilding, N. 1995. Influence of temperature on germination of primary and secondary conidia of Erynia neoaphidis (Zygomycetes: Entomophthorales). Journal of Invertebrate Pathology. 65, pp. 132-138.

Effects of temperature on aphid phenology

A - Papers appearing in refereed journals

Zhou, X-L, Harrington, R., Woiwod, I. P., Perry, J. N., Bale, J. S. and Clark, S. J. 1995. Effects of temperature on aphid phenology. Global Change Biology. 1 (4), pp. 303-313. https://doi.org/10.1111/j.1365-2486.1995.tb00029.x

Within-field spatial heterogeneity of arthropod predators and parasitoids

C1 - Edited contributions to conferences/learned societies

Powell, W., Hawthorne, A., Hemptinne, J. L., Holopainen, J. K., Den Nijs, L. J. F. M., Riedel, W. and Ruggle, P. 1995. Within-field spatial heterogeneity of arthropod predators and parasitoids.

Using mark-release-recapture techniques to study the influence of spatial heterogeneity on carabids

C1 - Edited contributions to conferences/learned societies

Powell, W. and Ashby, J. E. 1995. Using mark-release-recapture techniques to study the influence of spatial heterogeneity on carabids.

Variations of body length, weight, fat content and survival in Coccinella septempunctata at different hibernation sites

A - Papers appearing in refereed journals

Zhou, X-L, Honek, A., Powell, W. and Carter, N. 1995. Variations of body length, weight, fat content and survival in Coccinella septempunctata at different hibernation sites. Entomologia Experimentalis et Applicata. 75 (2), pp. 99-107.

Movement of apterous Sitobion avenae (Homoptera:Aphididae) in response to leaf disturbances caused by wind and rain

A - Papers appearing in refereed journals

Mann, J. A., Tatchell, G. M., Dupuch, M. J., Harrington, R., Clark, S. J. and McCartney, H. A. 1995. Movement of apterous Sitobion avenae (Homoptera:Aphididae) in response to leaf disturbances caused by wind and rain. Annals of Applied Biology - AAB. 126 (3), pp. 417-427. https://doi.org/10.1111/j.1744-7348.1995.tb05376.x

Metal chelate molluscicides: the redistribution of iron diazaalkanolates from the gut lumen of the slug, Deroceras reticulatum (Muller) (Pulmonata: Limacidae)

A - Papers appearing in refereed journals

Clark, S. J., Coward, N. P., Dawson, G. W., Henderson, I. F. and Martin, A. P. 1995. Metal chelate molluscicides: the redistribution of iron diazaalkanolates from the gut lumen of the slug, Deroceras reticulatum (Muller) (Pulmonata: Limacidae). Pesticide Science. 44 (4), pp. 381-388. https://doi.org/10.1002/ps.2780440410

The germination behaviour of Metarhizium anisopliae on the surface of aphid and flea beetle cuticles

A - Papers appearing in refereed journals

Butt, T. M., Ibrahim, L., Clark, S. J. and Beckett, A. 1995. The germination behaviour of Metarhizium anisopliae on the surface of aphid and flea beetle cuticles. Mycological Research. 99 (8), pp. 945-950. https://doi.org/10.1016/S0953-7562(09)80754-5

Effects of incorporating or burning straw, and of different cultivation systems, on winter wheat grown on two soil types, 1985-91

A - Papers appearing in refereed journals

Prew, R. D., Ashby, J. E., Bacon, E. T. G., Christian, D. G., Gutteridge, R. J., Jenkyn, J. F., Powell, W. and Todd, A. D. 1995. Effects of incorporating or burning straw, and of different cultivation systems, on winter wheat grown on two soil types, 1985-91. The Journal of Agricultural Science. 124 (2), pp. 173-194. https://doi.org/10.1017/S0021859600072853

Small sample estimation for Taylor's power law

A - Papers appearing in refereed journals

Clark, S. J. and Perry, J. N. 1994. Small sample estimation for Taylor's power law. Journal of Environmental and Ecological Statistics. 1 (4), pp. 287-302. https://doi.org/10.1007/BF00469426

The aphid sex pheromone: a novel host location cur for the parasitoid Praon volucre

C1 - Edited contributions to conferences/learned societies

Lilley, R., Hardie, J., Powell, W. and Wadhams, L. J. 1994. The aphid sex pheromone: a novel host location cur for the parasitoid Praon volucre. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 1994 . Wiley.

Electrophoretic studies of geographic and host strains of the aphid parasitoid Aphidius ervi

C2 - Non-edited contributions to conferences

Atanassova, P., Powell, W., Brookes, C. and Loxdale, H. 1994. Electrophoretic studies of geographic and host strains of the aphid parasitoid Aphidius ervi. Abstracts 5th European Congress of Entomology, York, 29th August-2nd September 1994 . pp. 251

Seasonal distribution and aerial movement of adult coccinellids on farmland

A - Papers appearing in refereed journals

Zhou, X-L, Carter, N. and Powell, W. 1994. Seasonal distribution and aerial movement of adult coccinellids on farmland. Biocontrol Science and Technology. 4, pp. 167-175.

Nemec and Stary's "population diversity centre" hypothesis for aphid parasitoids revisited

A - Papers appearing in refereed journals

Powell, W. 1994. Nemec and Stary's "population diversity centre" hypothesis for aphid parasitoids revisited. Norwegian Journal of Agricultural Sciences. Supplement 16, pp. 163-169.

The responses of Praon spp. parasitoids to aphid sex pheromone components in the field

A - Papers appearing in refereed journals

Hardie, J., Hick, A. J., Holler, C., Mann, J., Merritt, L., Nottingham, S. F., Powell, W., Wadhams, L. J., Witthinrich, J. and Wright, A. F. 1994. The responses of Praon spp. parasitoids to aphid sex pheromone components in the field. Entomologia Experimentalis et Applicata. 71 (2), pp. 95-99.

Design of field trials and its influence on the detection of pesticide side effects

C2 - Non-edited contributions to conferences

Kennedy, P. J., Carter, N., Walters, K. F. A., Perry, J. N., Powell, D. and Powell, W. 1994. Design of field trials and its influence on the detection of pesticide side effects. Abstracts Ecotoxicology - Ecological Dimensions: Proceedings 5th Annual Meeting of SETAC-Europe (UK Branch), Sheffield, 12-14 September 1994 . pp. 11

Interaction between cabbage seed weevil (Ceutorhynchus assimilis payk.) and brassica pod midge (Dasineura brassicae Winn.) in oilseed rape pods (in Polish)

C1 - Edited contributions to conferences/learned societies

Kelm, M., Ferguson, A. W., Williams, I. H., Kenward, M. G. and Clark, S. J. 1994. Interaction between cabbage seed weevil (Ceutorhynchus assimilis payk.) and brassica pod midge (Dasineura brassicae Winn.) in oilseed rape pods (in Polish). Materialy XXXIV Sesji Naukowej Instytutu Ochrony Roslin, Poznan, 1994 . pp. 258-262

Pathogenicity of the entomogenous fungi Metarhizium anisopliae and Beauveria bassiana against crucifer pests and the honey bee

A - Papers appearing in refereed journals

Butt, T. M., Ibrahim, L., Ball, B. V. and Clark, S. J. 1994. Pathogenicity of the entomogenous fungi Metarhizium anisopliae and Beauveria bassiana against crucifer pests and the honey bee. Biocontrol Science and Technology. 4, pp. 207-214.

The influence of glucosinolates and sugars on feeding by the cabbage stem flea beetle, Psylliodes chrysocephala

A - Papers appearing in refereed journals

Bartlet, E., Parsons, D., Williams, I. H. and Clark, S. J. 1994. The influence of glucosinolates and sugars on feeding by the cabbage stem flea beetle, Psylliodes chrysocephala. Entomologia Experimentalis et Applicata. 73 (1), pp. 77-83. https://doi.org/10.1111/j.1570-7458.1994.tb01841.x

The transmission of barley yellow dwarf virus at different temperatures

C2 - Non-edited contributions to conferences

Lowles, A. J., Clark, S. J. and Harrington, R. 1994. The transmission of barley yellow dwarf virus at different temperatures. Abstracts 5th European Congress of Entomology, York, 29th August-2nd September 1994 . pp. 286

Morph identification in natural populations of alate female bird cherry aphids, Rhopalosiphum padi L., by multivariate methods

A - Papers appearing in refereed journals

Taylor, M. S., Tatchell, G. M. and Clark, S. J. 1994. Morph identification in natural populations of alate female bird cherry aphids, Rhopalosiphum padi L., by multivariate methods. Annals of Applied Biology - AAB. 125 (1), pp. 1-11. https://doi.org/10.1111/j.1744-7348.1994.tb04941.x

Design of field trials and its influence on the detection of pesticide side effects

C2 - Non-edited contributions to conferences

Kennedy, P. J., Carter, N., Walters, K. F. A., Perry, J. N., Powell, D. and Powell, W. 1994. Design of field trials and its influence on the detection of pesticide side effects. Abstracts 5th European Congress of Entomology, York, 29th August-2nd September 1994 . pp. 276

The field attraction of female %Praon parasitoids to an aphid sex pheromone

C2 - Non-edited contributions to conferences

Lilley, R. I., Hardie, J., Powell, W. and Wadhams, L. J. 1993. The field attraction of female %Praon parasitoids to an aphid sex pheromone. Abstracts 5th International Symposium of the Global IOBC Working Group on the Ecology of Aphidophaga: Behavioural Ecology, Augmentation and Enhancement of Aphidophaga, Antibes, 6-10 September 1993 .

Electroantennogram and olfactometer responses of aphid parasitoids to nepetalactone, a component of aphid sex pheromones

C2 - Non-edited contributions to conferences

Hardie, J., Isaacs, R., Nazzi, F., Powell, W., Wadhams, L. J. and Woodcock, C. M. 1993. Electroantennogram and olfactometer responses of aphid parasitoids to nepetalactone, a component of aphid sex pheromones. Abstracts 5th International Symposium of the Global IOBC Working Group on the Ecology of Aphidophaga: Behavioural Ecology, Augmentation and Enhancement of Aphidophaga, Antibes, 6-10 September 1993 .

Responses of the parasitoid Praon volucre (Hymenoptera: Braconidae) to aphid sex pheromone lures in cereal fields in autumn: implications for parasitoid manipulation

A - Papers appearing in refereed journals

Powell, W., Hardie, J., Hick, A. J., Holler, C., Mann, J., Merritt, L., Nottingham, S. F., Wadhams, L. J., Witthinrich, J. and Wright, A. F. 1993. Responses of the parasitoid Praon volucre (Hymenoptera: Braconidae) to aphid sex pheromone lures in cereal fields in autumn: implications for parasitoid manipulation. European Journal of Entomology. 90, pp. 435-438.

The use of multiple regression via principal components in forecasting early season aphid (Homoptera: Aphididae) flight

A - Papers appearing in refereed journals

Howling, G. G., Harrington, R., Clark, S. J. and Bale, J. S. 1993. The use of multiple regression via principal components in forecasting early season aphid (Homoptera: Aphididae) flight. Bulletin of Entomological Research. 83 (3), pp. 377-381. https://doi.org/10.1017/S0007485300029278

Sex pheromones in the cereal aphid parasitoids Praon volucre and Aphidius rhopalosiphi

A - Papers appearing in refereed journals

Decker, U. M., Powell, W. and Clark, S. J. 1993. Sex pheromones in the cereal aphid parasitoids Praon volucre and Aphidius rhopalosiphi. Entomologia Experimentalis et Applicata. 69, pp. 33-39.

Selection of an isolate of Zoophthora radicans (Zygomycetes:Entomophthorales) for biocontrol of the diamondback moth Plutella xylostella (Lepidoptera:Yponomeutidae)

A - Papers appearing in refereed journals

Pell, J. K., Wilding, N., Player, A. L. and Clark, S. J. 1993. Selection of an isolate of Zoophthora radicans (Zygomycetes:Entomophthorales) for biocontrol of the diamondback moth Plutella xylostella (Lepidoptera:Yponomeutidae). Journal of Invertebrate Pathology. 61, pp. 75-80.

Management of genetics of biological control introductions

A - Papers appearing in refereed journals

Hopper, K. R., Roush, R. T. and Powell, W. 1993. Management of genetics of biological control introductions. Annual Review of Entomology. 38, pp. 27-51.

The relationship between primary parasitoids and hyperparasitoids of cereal aphids: an analysis of field data

A - Papers appearing in refereed journals

Holler, C., Borgemeister, C. W., Haardt, H. and Powell, W. 1993. The relationship between primary parasitoids and hyperparasitoids of cereal aphids: an analysis of field data. Journal of Animal Ecology. 62 (1), pp. 12-21. https://doi.org/10.2307/5478

Synomones and kairomones from plants and honeydew in susceptible and resistant varieties; their importance to natural enemies.

C2 - Non-edited contributions to conferences

Powell, W. 1992. Synomones and kairomones from plants and honeydew in susceptible and resistant varieties; their importance to natural enemies. Abstracts 19th International Congress of Entomology, Beijing, 1992 .

Genetics of biological control introductions

C2 - Non-edited contributions to conferences

Hopper, K. R., Rousch, R. T. and Powell, W. 1992. Genetics of biological control introductions. Abstracts 19th International Congress of Entomology, Beijing, 1992 .

Genetics of biological control introductions

C2 - Non-edited contributions to conferences

Hopper, K. R., Roush, R. T. and Powell, W. 1992. Genetics of biological control introductions. Abstracts 19th International Congress of Entomology, Beijing, 1992 .

Tritrophic influences on aphid parasitoids (Hym.,Braconidae:Aphidiinae)

C1 - Edited contributions to conferences/learned societies

Powell, W. 1992. Tritrophic influences on aphid parasitoids (Hym.,Braconidae:Aphidiinae).

Comparative phenologies of two migrant cereal aphid species

A - Papers appearing in refereed journals

Clark, S. J., Tatchell, G. M., Perry, J. N. and Woiwod, I. P. 1992. Comparative phenologies of two migrant cereal aphid species. Journal of Applied Ecology. 29 (3), pp. 571-580. https://doi.org/10.2307/2404464

Honeydew as an ovipositional stimulant for two species of syrphids

A - Papers appearing in refereed journals

Budenberg, W. J. and Powell, W. 1992. Honeydew as an ovipositional stimulant for two species of syrphids. Entomologia Experimentalis et Applicata. 64, pp. 57-61.

The influence of aphids and honeydew on the leaving rate of searching aphid parasitoids from wheat plants

A - Papers appearing in refereed journals

Budenberg, W. J., Powell, W. and Clark, S. J. 1992. The influence of aphids and honeydew on the leaving rate of searching aphid parasitoids from wheat plants. Entomologia Experimentalis et Applicata. 63 (3), pp. 259-264.

The influence of host food plants on host recognition by four aphidiine parasitoids (Hymenoptera: Braconidae)

A - Papers appearing in refereed journals

Powell, W. and Wright, A. F. 1992. The influence of host food plants on host recognition by four aphidiine parasitoids (Hymenoptera: Braconidae). Bulletin of Entomological Research. 81 (4), pp. 449-453. https://doi.org/10.1017/S0007485300032028

Ecology and population dynamics: Chairman's summing up and comments for the session on ecology and population dynamics

C2 - Non-edited contributions to conferences

Powell, W. 1991. Ecology and population dynamics: Chairman's summing up and comments for the session on ecology and population dynamics. Proceedings 4th European Parasitoid Workshop, Perugia, Italy, 3-5 April 1991 . pp. 5-6

Biochemical interactions between plant-herbivore-parasitoid

C1 - Edited contributions to conferences/learned societies

Pickett, J. A., Powell, W., Wadhams, L. J., Woodcock, C. M. and Wright, A. F. 1991. Biochemical interactions between plant-herbivore-parasitoid. Insect Parasitoids: 4th European Workshop, Perugia, April 1991.

Cereal aphids and their natural enemies

C1 - Edited contributions to conferences/learned societies

Wratten, S. D. and Powell, W. 1991. Cereal aphids and their natural enemies. Carter, N., Potts, G. R., Darbyshire, J. F. and Firbank, L. G. (ed.) The Ecology of Temperate Cereal Fields. Proceedings 32nd Symposium of the British Ecological Society with the Association of Applied Biologists, University of Cambridge, 1991. Blackwell Scientific Publications, Oxford. pp. 233-257

The influence of semiochemicals on the behaviour of cereal aphid parasitoids (Hymenoptera)

C1 - Edited contributions to conferences/learned societies

Powell, W., Decker, U. M. and Budenberg, W. J. 1991. The influence of semiochemicals on the behaviour of cereal aphid parasitoids (Hymenoptera). Chambers, R. J., Hodek, I., Dixon, A. F. G. and Polgar, L. (ed.) Behaviour and impact of Aphidophaga. SPB Academic Publishing, The Hague. pp. 67-71

Synthetic aphid sex pheromone lures female parasitoids

A - Papers appearing in refereed journals

Hardie, J., Nottingham, S. F., Powell, W. and Wadhams, L. J. 1991. Synthetic aphid sex pheromone lures female parasitoids. Entomologia Experimentalis et Applicata. 61 (1), pp. 97-99.

A new approach to the use of meteorological and suction trap data in predicitng aphid problems

C1 - Edited contributions to conferences/learned societies

Harrington, R., Howling, G. G., Bale, J. S. and Clark, S. J. 1991. A new approach to the use of meteorological and suction trap data in predicitng aphid problems.

Conservation and manipulation of aphid parasitoids

C1 - Edited contributions to conferences/learned societies

Powell, W., Budenberg, W. J., Decker, U. M. and Wright, A. F. 1990. Conservation and manipulation of aphid parasitoids. Proceedings Brighton Crop Protection Conference - Pests and Diseases, 1990. pp. 185-690

Pollination requirements of linseed (Linum usitatissimum)

A - Papers appearing in refereed journals

Williams, I. H., Martin, A. H. and Clark, S. J. 1990. Pollination requirements of linseed (Linum usitatissimum). The Journal of Agricultural Science. 115, pp. 347-352. https://doi.org/10.1017/S0021859600075778

Effect of pollination on flower, pod and seed production in white lupin (Lupinus albus)

A - Papers appearing in refereed journals

Williams, I. H., Martin, A. P., Ferguson, A. W. and Clark, S. J. 1990. Effect of pollination on flower, pod and seed production in white lupin (Lupinus albus). The Journal of Agricultural Science. 115 (1), pp. 67-73. https://doi.org/10.1017/S0021859600073937

Electrophoresis as a tool for estimating levels of hymenopterous parasitism in field populations of the cereal aphid, Sitobion avenae .

A - Papers appearing in refereed journals

Walton, M. P., Powell, W., Loxdale, H. D. and Allen-Williams, L. J. 1990. Electrophoresis as a tool for estimating levels of hymenopterous parasitism in field populations of the cereal aphid, Sitobion avenae . Entomologia Experimentalis et Applicata. 54 (3), pp. 271-279.

The use of electrophoresis in the study of hymenopteran parasitoids of agricultural pests.

B - Book chapters etc edited externally

Powell, W. and Walton, M. P. 1989. The use of electrophoresis in the study of hymenopteran parasitoids of agricultural pests. in: Electrophoretic studies on agricultural pests. Systematics Association Special Volume H.D. Loxdale & J. Den Hollander eds Clarendon Press, Oxford.

Resurgence of insecticide-resistant Myzus persicae on potatoes treated repeatedly with cypermethrin and mineral oil.

A - Papers appearing in refereed journals

Harrington, R., Bartlet, E., Riley, D. K., Ffrench-Constant, R. H. and Clark, S. J. 1989. Resurgence of insecticide-resistant Myzus persicae on potatoes treated repeatedly with cypermethrin and mineral oil. Crop Protection. 8, pp. 340-348.

Effectiveness of different insecticides applied at various growth stages to control aphids on winter wheat.

A - Papers appearing in refereed journals

Carter, N., Powell, W., Wright, A. F. and Ashby, J. E. 1989. Effectiveness of different insecticides applied at various growth stages to control aphids on winter wheat. Crop Protection. 8, pp. 271-276.

Estimation of the negative binomial parameter k by maximum quasi-likelihood.

A - Papers appearing in refereed journals

Clark, S. J. and Perry, J. N. 1989. Estimation of the negative binomial parameter k by maximum quasi-likelihood. Biometrics. 45 (1), pp. 309-316. https://doi.org/10.2307/2532055

Observations on the effects of an autumn application of a pyrethroid insecticide on non-target predatory species in winter cereals.

C1 - Edited contributions to conferences/learned societies

Purvis, G., Carter, N. and Powell, W. 1988. Observations on the effects of an autumn application of a pyrethroid insecticide on non-target predatory species in winter cereals. Integrated crop protection in cereals. Proceedings of the EC Experts' Group Meeting, Littlehampton, 1986. Eds R. Cavalloro & K. Sunderland. pp. 153-159

Honeydew as a kairomone for aphid parasitoids and hyperparasitoids.

C1 - Edited contributions to conferences/learned societies

Budenberg, W. J. and Powell, W. 1988. Honeydew as a kairomone for aphid parasitoids and hyperparasitoids. &nbsp;Proceedings British Crop Protection Conference - Pests and Diseases, Brighton, 1988, 1149-1154..

The abilities of the aphid parasitoids Aphidius ervi Haliday and A. rhopalosiphi De Stefani Perez (Hymenoptera: Braconidae) to transfer between different known host species and the implications for the use of alternative hosts in pest control strategies.

A - Papers appearing in refereed journals

Powell, W. and Wright, A. F. 1988. The abilities of the aphid parasitoids Aphidius ervi Haliday and A. rhopalosiphi De Stefani Perez (Hymenoptera: Braconidae) to transfer between different known host species and the implications for the use of alternative hosts in pest control strategies. Bulletin of Entomological Research. 78 (4), pp. 683-693. https://doi.org/10.1017/S0007485300015546

The effect of fungus infection of Metopolophium dirhodum [Hom.: Aphididae] on the oviposition behaviour of the aphid parasitoid Aphidius rhopalosiphi [Hym.: Aphididae].

A - Papers appearing in refereed journals

Brobyn, P. J., Clark, S. J. and Wilding, N. 1988. The effect of fungus infection of Metopolophium dirhodum [Hom.: Aphididae] on the oviposition behaviour of the aphid parasitoid Aphidius rhopalosiphi [Hym.: Aphididae]. Entomophaga. 33, pp. 333-338.

Close-range behaviour of male pea moths, Cydia nigricana, responding to sex pheromone re-released via the substrate

A - Papers appearing in refereed journals

Perry, J. N., Wall, C. and Clark, S. J. 1988. Close-range behaviour of male pea moths, Cydia nigricana, responding to sex pheromone re-released via the substrate. Entomologia Experimentalis et Applicata. 49 (42767), pp. 37-42.

Effect of decline of insecticide residues on selection for insecticide resistance in Myzus persicae (Sulzer) (Hemiptera: Aphididae)

A - Papers appearing in refereed journals

Ffrench-Constant, R. H., Clark, S. J. and Devonshire, A. L. 1988. Effect of decline of insecticide residues on selection for insecticide resistance in Myzus persicae (Sulzer) (Hemiptera: Aphididae). Bulletin of Entomological Research. 78 (1), pp. 19-29. https://doi.org/10.1017/S0007485300016047

Differential rate of selection for resistance by carbamate, organophosphorus and combined pyrethroid and organophosphorus insecticides in Myzus persicae (Sulzer) (Hemiptera: Aphididae).

A - Papers appearing in refereed journals

Ffrench-Constant, R. H., Devonshire, A. L. and Clark, S. J. 1987. Differential rate of selection for resistance by carbamate, organophosphorus and combined pyrethroid and organophosphorus insecticides in Myzus persicae (Sulzer) (Hemiptera: Aphididae). Bulletin of Entomological Research. 77 (2), pp. 227-238. https://doi.org/10.1017/S0007485300011706

Laboratory observations on the effect of humidity on the persistence of infectivity of conidia of the aphid pathogen Erynia neoaphidis .

A - Papers appearing in refereed journals

Brobyn, P. J., Wilding, N. and Clark, S. J. 1987. Laboratory observations on the effect of humidity on the persistence of infectivity of conidia of the aphid pathogen Erynia neoaphidis . Annals of Applied Biology - AAB. 110 (3), pp. 579-584. https://doi.org/10.1111/j.1744-7348.1987.tb04176.x

Accurate estimation of invertebrate density in cereals.

G - Articles in popular magazines and other technical publications

Sunderland, K. D., Hawkes, C., Stevenson, J. H., Mcbride, T., Smart, L. E., Sopp, P. I., Powell, W., Chambers, R. J. and Carter, O. C. R. 1987. Accurate estimation of invertebrate density in cereals. Bulletin IOBC/WPRS/SROP . 10, pp. 71-81.

The influence of weeds on aphid-specific natural enemies in winter wheat.

A - Papers appearing in refereed journals

Powell, W., Dean, G. J. and Wilding, N. 1986. The influence of weeds on aphid-specific natural enemies in winter wheat. Crop Protection. 5, pp. 182-189.

Biocontrol of cereal aphids in the United Kingdom by a range of natural enemies.

G - Articles in popular magazines and other technical publications

Powell, W. 1986. Biocontrol of cereal aphids in the United Kingdom by a range of natural enemies.

Enhancing parasitoid activity in crops.

G - Articles in popular magazines and other technical publications

Powell, W. 1986. Enhancing parasitoid activity in crops.

The pattern and speed of displacement of females of simulium-damnosum theobald si (diptera, simuliidae) across the onchocerciasis control program area of west-africa in 1977 and 1978

A - Papers appearing in refereed journals

Johnson, C. G., Walsh, J. F., Davies, J. B., Clark, S. J. and Perry, J. N. 1985. The pattern and speed of displacement of females of simulium-damnosum theobald si (diptera, simuliidae) across the onchocerciasis control program area of west-africa in 1977 and 1978. Bulletin of Entomological Research. 75 (1), pp. 73-92. https://doi.org/10.1017/s0007485300014188

Assessment of resistance of commercial varieties of winter-wheat to cereal aphids

A - Papers appearing in refereed journals

Dewar, A. M., Carter, N. and Powell, W. 1985. Assessment of resistance of commercial varieties of winter-wheat to cereal aphids. Annals of Applied Biology - AAB. 106, pp. 168-169.

Effects of pirimicarb, dimethoate and benomyl on natural enemies of cereal aphids in winter wheat

A - Papers appearing in refereed journals

Powell, W., Dean, G. J. and Bardner, R. 1985. Effects of pirimicarb, dimethoate and benomyl on natural enemies of cereal aphids in winter wheat. Annals of Applied Biology - AAB. 106 (2), pp. 235-242. https://doi.org/10.1111/j.1744-7348.1985.tb03113.x

The influence of weeds on polyphagous arthropod predators in winter wheat

A - Papers appearing in refereed journals

Powell, W., Dean, G. J. and Dewar, A. 1985. The influence of weeds on polyphagous arthropod predators in winter wheat. Crop Protection. 4, pp. 298-312.

The persistence of infectivity of conidia of the aphid pathogen Erynia neophidis on leaves in the field

A - Papers appearing in refereed journals

Brobyn, P. J., Wilding, N. and Clark, S. J. 1985. The persistence of infectivity of conidia of the aphid pathogen Erynia neophidis on leaves in the field. Annals of Applied Biology - AAB. 107 (3), pp. 365-376. https://doi.org/10.1111/j.1744-7348.1985.tb03153.x

Pheromones in the management of beneficial insects

A - Papers appearing in refereed journals

Pickett, J. A., Dawson, G. W., Free, J. B., Griffiths, D. C., Powell, W., Williams, I. M. and Woodcock, C. M. 1984. Pheromones in the management of beneficial insects. Proceedings of the British Crop Protection Council. 1, pp. 247-254.

Pheromones in the management of beneficial insects

A - Papers appearing in refereed journals

Dawson, G. W., Free, J. B., Griffiths, D. C., Powell, W., Williams, I. M. and Woodcock, C. M. 1984. Pheromones in the management of beneficial insects. Proceedings of the British Crop Protection Council. 1, pp. 247-254.

Reservoirs for Aphidius ervi Haliday (Hymenoptera: Aphidiidae), a polyphagous parasitoid of cereal aphids (Hemiptera: Aphididae)

A - Papers appearing in refereed journals

Cameron, P. J., Powell, W. and Loxdale, H. D. 1984. Reservoirs for Aphidius ervi Haliday (Hymenoptera: Aphidiidae), a polyphagous parasitoid of cereal aphids (Hemiptera: Aphididae). Bulletin of Entomological Research. 74 (4), pp. 647-656. https://doi.org/10.1017/S0007485300014024

The role of parasitoids in limiting cereal aphid populations

B - Book chapters etc edited externally

Powell, W. 1983. The role of parasitoids in limiting cereal aphid populations. in: Cavalloro, R. (ed.) Rotterdam, Netherlands A.A. Balkema. pp. 50-56

Use of population-models to estimate the proportion of cyst-nematode eggs killed by fumigation

A - Papers appearing in refereed journals

Perry, J. N. and Clark, S. J. 1983. Use of population-models to estimate the proportion of cyst-nematode eggs killed by fumigation. Journal of Applied Ecology. 20 (3), pp. 857-864. https://doi.org/10.2307/2403130

The reactions of two cereal aphid parasitoids, aphidius-uzbekistanicus and aphidius-ervi to host aphids and their food-plants

A - Papers appearing in refereed journals

Powell, W. and Zhang, Z. L. 1983. The reactions of two cereal aphid parasitoids, aphidius-uzbekistanicus and aphidius-ervi to host aphids and their food-plants. Physiological Entomology. 8 (4), pp. 439-443. https://doi.org/10.1111/j.1365-3032.1983.tb00378.x

The role of parasitoids in limiting cereal aphid populations

A - Papers appearing in refereed journals

Powell, W. 1982. The role of parasitoids in limiting cereal aphid populations. Aphid antagonists. Proceedings of a meeting of the EC Experts' Group, Portici, Italy, 23-24 November 1982. pp. 50-56.

The identification of hymenopterous parasitoids attacking cereal aphids in Britain

A - Papers appearing in refereed journals

Powell, W. 1982. The identification of hymenopterous parasitoids attacking cereal aphids in Britain. Systematic Entomology. 7 (4), pp. 465-473. https://doi.org/10.1111/j.1365-3113.1982.tb00457.x

Towards integrated control of cereal aphids

A - Papers appearing in refereed journals

Powell, W., Dean, G. J., Dewar, A. M. and Wilding, N. 1981. Towards integrated control of cereal aphids. Proceedings of the British Insecticide and Fungicide Conference. 11.

The relative abundance of the hymenopterous parasites attacking metopolophium-dirhodum (walker) and sitobion-avenae (f) (hemiptera, aphididae) on cereals during 1973-79 in southern England

A - Papers appearing in refereed journals

Dean, G. J., Jones, M. G. and Powell, W. 1981. The relative abundance of the hymenopterous parasites attacking metopolophium-dirhodum (walker) and sitobion-avenae (f) (hemiptera, aphididae) on cereals during 1973-79 in southern England. Bulletin of Entomological Research. 71 (2), pp. 307-315. https://doi.org/10.1017/s0007485300008336

Toxares deltiger (Haliday) (Hymenoptera: Aphidiidae) parasiting the cereal aphid, Metopolophium dirhodum (Walker) (Hemiptera: Aphididae), in southern England: a new host-parasitoid record

A - Papers appearing in refereed journals

Powell, W. 1980. Toxares deltiger (Haliday) (Hymenoptera: Aphidiidae) parasiting the cereal aphid, Metopolophium dirhodum (Walker) (Hemiptera: Aphididae), in southern England: a new host-parasitoid record. Bulletin of Entomological Research. 70 (3), pp. 407-409. https://doi.org/10.1017/s0007485300007665