Age-specific expression of resistance to a neonicotinoid insecticide in the whitefly Bemisia tabaci

A - Papers appearing in refereed journals

Nauen, R., Bielza, P., Denholm, I. and Gorman, K. J. 2008. Age-specific expression of resistance to a neonicotinoid insecticide in the whitefly Bemisia tabaci. Pest Management Science. 64 (11), pp. 1106-1110.

AuthorsNauen, R., Bielza, P., Denholm, I. and Gorman, K. J.
Abstract

Neonicotinoid insecticides retain a crucial role within many chemical and integrated control strategies for the tobacco whitefly, Bemisia tabaci Gernnadius, in spite of the establishment of potent and widespread resistance in many areas. Metabolic resistance mechanisms mediated by overexpression of P450-dependent monooxygenases have been implicated in neonicotinoid resistance in the two most prevalent B. tabaci biotypes. Further characterisation of resistance to the neonicotinoid imidacloprid in populations of both these 13- and Q-types is reported. Expression of resistance to imidacloprid was age specific in 13- and Q-type strains of B. tabaci. The highest observed resistance ratio at LC50 expressed in prepupal nymphs was 13, compared with at least 580 in their adult counterparts. For all strains, resistance expressed in immatures was not sufficiently potent to compromise recommended imidacloprid application rates. Targeting neonicotinoids towards immature life stages of B. tabaci may circumvent the protection conferred by current mechanisms of resistance, simultaneously reducing the selection pressures imposed. However, such tactics may enhance the expression of existing resistance mechanisms in immatures, or promote the establishment of novel ones expressed in all life stages. (c) 2008 Society of Chemical Industry

KeywordsAgronomy; Entomology
Year of Publication2008
JournalPest Management Science
Journal citation64 (11), pp. 1106-1110
Digital Object Identifier (DOI)doi:10.1002/ps.1654
PubMed ID18798168
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeCentre for Sustainable Pest and Disease Management (PDM)
ISSN1526498X
PublisherWiley

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