Aphid resistance in wheat varieties

A - Papers appearing in refereed journals

Elek, H., Werner, P., Smart, L. E., Gordon-Weeks, R., Nadasy, M. and Pickett, J. A. 2009. Aphid resistance in wheat varieties. Communications in Agricultural and Applied Biological Sciences. 74 (1), pp. 233-41.

AuthorsElek, H., Werner, P., Smart, L. E., Gordon-Weeks, R., Nadasy, M. and Pickett, J. A.
Abstract

As an environmentally compatible alternative to the use of conventional insecticides to control cereal aphids, we have investigated the possibility to exploit natural resistance to insect pests in wheat varieties. We have tested a wide range of hexaploid (Triticum aestivum), tetraploid (T. durum) and diploid (T. boeoticum and T. monococcum) wheat lines for resistance to the bird cherry oat aphid (Rhopalosiphum padi). Lines tested included Russian wheat aphid (Diuraphis noxia), greenbug (Schizaphis graminum), hessian fly (Mayetiola destructor) and orange wheat blossom midge (Sitodiplosis mosellana) resistant varieties. Antixenosis and antibiosis were determined in the settling and fecundity tests respectively. Since hydroxamic acids (Hx), including the most generally active, 2,4-dihidroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), are biosynthesised in many cereal plants and are implicated in resistance against insects, leaf tissue was analysed for Hx and the glucosides from which they are produced. The hexaploid varieties, which contained relatively low levels of the DIMBOA glucoside, did not deter aphid feeding or reduce nymph production significantly. Reduced settlement and nymph production were recorded on the diploid varieties, but they contained no detectable level of the glucoside or the toxic aglucone.

KeywordsAnimals; Behavior, Animal/drug effects; Hydroxamic Acids/metabolism; Nymph/drug effects; Plant Leaves/metabolism; Reproduction/drug effects
Year of Publication2009
JournalCommunications in Agricultural and Applied Biological Sciences
Journal citation74 (1), pp. 233-41
PubMed ID20218532
Open accessPublished as green open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeChemical ecology of pest and beneficial arthropods : Understanding and exploiting semiochemical based mechanisms
Accepted author manuscript
Output statusPublished
Publication dates
Print2009
ISSN13791176
Copyright licenseCC BY-NC-ND
PublisherNLM

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