Pyrethroid insecticide resistance in British populations of the cabbage whitefly, Aleyrodes proletella
Springate, Simon and Colvin, John (2012) Pyrethroid insecticide resistance in British populations of the cabbage whitefly, Aleyrodes proletella. Pest Management Science, 68 (2). pp. 260-267. ISSN 1526-498XFull text not available from this repository.
The cabbage whiteﬂy, Aleyrodes proletella L., is emerging as a signiﬁcant pest of ﬁeld brassica crops in certain regions of the United Kingdom. In order to investigate the contribution of pesticide resistance to this phenomenon, A. proletella populations were sampled from ﬁve different areas in England in 2008 and 2009. Adult residual leaf-dip bioassays were carried out using pyrethroid and neonicotinoid insecticides. RESULTS: Signiﬁcant resistance to pyrethroids was found in multiple samples collected from two areas. No evidence of crossresistance to neonicotinoids was found in a subset of the pyrethroid-resistant populations. While the patterns of resistance to different pyrethroids were broadly correlated, the magnitude of resistance factors differed substantially. Survival of strains at a putative diagnostic concentration of lambda-cyhalothrin was found to provide a guide to their LC50. Signiﬁcant differences in LC50 were found when different brassica crops were used in the bioassay, although the resistance patterns between strains were maintained.
CONCLUSION: Reduced susceptibility to multiple pyrethroid insecticides exists in populations of A. proletella in the United Kingdom, corresponding to recent major outbreaks. The mechanism(s) of resistance are yet to be determined, but molecular structural differences in pyrethroids probably inﬂuence the magnitude of cross-resistance within this group of insecticides.
|Uncontrolled Keywords:||Aleyrodes proletella, cabbage whiteﬂy, insecticide resistance, pyrethroid, neonicotinoid|
|Subjects:||S Agriculture > S Agriculture (General)|
S Agriculture > SB Plant culture
|School / Department / Research Groups:||Natural Resources Institute|
Natural Resources Institute > Agriculture, Health & Environment
|Last Modified:||07 Feb 2012 16:37|
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