The sex pheromones of mealy plum (Hayalopterus pruni) and leaf-curl plum (Brachycaudus helichrysi) aphids: identification and field trapping of male and gynoparous aphids in prune orchards

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Symmes, E. J., Dewhirst, S. Y., Birkett, M. A., Campbell, C. A. M., Chamberlain, K., Pickett, J. A. and Zalom, F. G. 2012. The sex pheromones of mealy plum (Hayalopterus pruni) and leaf-curl plum (Brachycaudus helichrysi) aphids: identification and field trapping of male and gynoparous aphids in prune orchards. Journal of Chemical Ecology. 38 (5), pp. 576-583.

AuthorsSymmes, E. J., Dewhirst, S. Y., Birkett, M. A., Campbell, C. A. M., Chamberlain, K., Pickett, J. A. and Zalom, F. G.
Abstract

Mealy plum, Hyalopterus pruni, and leaf-curl plum, Brachycaudus helichrysi, aphids are the primary arthropod pests in orchards that produce dried plums (i.e., prunes). The sexual stage of their respective lifecycles occurs on prune trees in the fall, during which time males respond to sex pheromones produced by oviparous females. Air-entrainment collections confirmed that oviparous H. pruni and B. helichrysi emitted combinations of (4aS, 7S, 7aR)-nepetalactone and (1R, 4aS, 7S, 7aR)-nepetalactol. The responses of H. pruni and B. helichrysi to these compounds in ratios of 1:0, 0:1, 1:1, 2.6:1, 3.4:1, 5:1, 7:1, and 0:0 (no-pheromone control) using water traps were determined in field experiments conducted in prune orchards during the fall. The greatest number of male H. pruni was caught in traps releasing a 1:1 ratio of (4aS, 7S, 7aR)-nepetalactone and (1R, 4aS, 7S, 7aR)-nepetalactol, while male B. helichrysi were caught in similar numbers in traps releasing any of the two-component ratios tested. There was no evidence that any of the pheromone treatments influenced trap catches of gynoparae of either species. Results suggest that addition of sex pheromone lures increases trap catches of male H. pruni and B. helichrysi, and that this approach may improve monitoring and management of these pests in prune orchards. Knowledge gained from this study contributes to the understanding of the ecology of insect pests in prune orchards.

Keywords(4aS, 7S, 7aR)-Nepetalactone; (1R, 4aS, 7S, 7aR)-nepetalactol; Monitoring; Management; Dried plum; Chemoreception; Hemiptera; Sternorrhyncha; Aphididae
Year of Publication2012
JournalJournal of Chemical Ecology
Journal citation38 (5), pp. 576-583
Digital Object Identifier (DOI)doi:10.1007/s10886-012-0121-y
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeCentre for Sustainable Pest and Disease Management (PDM)
Elucidating the chemical ecology of below ground plant-plant communication
Output statusPublished
Publication dates
Online02 May 2012
Publication process dates
Accepted15 Apr 2012
Copyright licensePublisher copyright
ISSN0098-0331
PublisherSpringer

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