Traces of Imidacloprid Induce Hormesis as a Stimulatory Conditioned Response of Sweetpotato Whitefly (Hemiptera: Aleyrodidae)

Our purpose is to determine whether extremely low concentrations of imidacloprid (2–8 ppb) typically found in field soil 1–3 yr after a crop is grown using seed with a standard imidacloprid seed-coating could impact the fitness of whiteflies, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae). Result...

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Bibliographic Details
Published in:Environmental entomology 2019-12, Vol.48 (6), p.1418-1424
Main Authors: Rakotondravelo, M, Smitley, D, Calabrese, E, Ladoni, M
Format: Article
Language:English
Subjects:
Animals
Hemiptera
Hormesis
imidacloprid
Insecticides
Neonicotinoids
Nitro Compounds
PHYSIOLOGICAL ECOLOGY
resistance
sweetpotato whitefly
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Summary:Our purpose is to determine whether extremely low concentrations of imidacloprid (2–8 ppb) typically found in field soil 1–3 yr after a crop is grown using seed with a standard imidacloprid seed-coating could impact the fitness of whiteflies, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae). Results of our experiments indicate that imidacloprid-resistant whitefly larvae feeding on cotton seedlings growing in soil with 8.0 ppb imidacloprid are conditioned so that when the same individuals feed on plants treated with imidacloprid as adults their fitness, measured as fecundity, increases 30–70% compared with individuals that were not primed as larvae. This conditioning hormesis stimulates resistant whiteflies more than susceptible whiteflies, which may contribute to the selection of resistant populations.
ISSN:0046-225X
1938-2936
DOI:10.1093/ee/nvz121