Ecotoxicology (2015) 24, 479-487

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Yanyan Qu, Da Xiao, Jinyu Li, Zhou Chen, Antonio Biondi, Nicolas Desneux, Xiwu Gao and Dunlun Song (2015)
Sublethal and hormesis effects of imidacloprid on the soybean aphid Aphis glycines
Ecotoxicology 24 (3), 479-487
Abstract: The soybean aphid, Aphis glycines Matsumura, is a major pest in soybean crop. Current management of this pest relies mainly on insecticides applications, and the neonicotinoid imidacloprid has been proposed as an effective insecticide to control A. glycines in soybean field. Imidacloprid at lethal concentrations not only exerts acute toxicity to A. glycines, but also cause various biological changes when aphids are chronically exposed to lower concentrations. In this study, we assessed the effects of a low-lethal (0.20 mg L-1) and two sublethal (0.05 and 0.10 mg L-1) imidacloprid concentrations on various A. glycines life history traits. Aphid exposure to 0.20 mg L-1 imidacloprid caused slower juvenile development, shorter reproductive period, and reduced adult longevity, fecundity and total lifespan. Stimulatory effects, i.e. hormesis, on reproduction and immature development duration were observed in aphids exposed to the lower sublethal imidacloprid concentrations. Consequently, the net reproduction rate (R 0) was significantly higher than in the control aphids. These findings stress the importance of the actual imidacloprid concentration in its toxicological properties on A. glycines. Therefore, our results would be useful for assessing the overall effects of imidacloprid on A. glycines and for optimizing integrated pest management programs targeting this pest.
(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): Dun-Lun Song, Nicolas Desneux, Xi-Wu Gao, Antonio Biondi

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Aphis glycines Soybean (Glycine max) China (NE)