Bulletin of Entomological Research (1996) 86, 343-349

Matthew Cahill, Kevin Gorman, Sara Day, Ian Denholm, Alfred Elbert and Ralf Nauen (1996)
Baseline determination and detection of resistance to imidacloprid in Bemisia tabaci (Homoptera: Aleyrodidae)
Bulletin of Entomological Research 86 (4), 343-349
Abstract: Adult Bemisia tabaci (Gennadius) were tested with imidacloprid in a bioassay method using systemically treated cotton leaves. The method was simple, robust and repeatable and provided baseline data for a laboratory and a number of recently collected field strains. The LC₅₀ for imidacloprid susceptible strains was calculated to be 1.7 ppm and a concentration of 16 pprn determined as diagnostic for imidacloprid resistance. Ten strains of B. tabaci collected from the Almeria region of Spain showed significantly less mortality at the diagnostic dose than the susceptible strains. The intensive use of imidacloprid in the Almeria region is considered the reason for the occurrence of resistance in this locality. Resistance to organophosphates, pyrethroids and endosulfan in B-type and non-B type B. tabaci did not confer resistance to imidacloprid.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ian Denholm, Kevin Gorman, Ralf Nauen

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci biotype MEAM1		Spain (continental)
	Bemisia tabaci		Spain (continental)