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Institut Sophia Agrobiotech

Institut Sophia Agrobiotech

Institut Sophia Agrobiotech

UMR INRA - Univ. Nice Sophia Antipolis - Cnrs
Inra PACA
400 route des chappes
BP 167
0690 Sophia Antipolis Cedex
FRANCE
Tel. : +33(0)4 92 38 64 00
Fax : + 33(0)4 92 38 64 01

http://www.paca.inra.fr/institut-sophia-agrobiotech

Ecotoxicology

09 mars 2017

Ecotoxicology
© 2017 Springer International Publishing AG.
Sublethal effects of imidacloprid on the predatory seven-spot ladybird beetle Coccinella septempunctata

Abstract

The seven-spot ladybird beetle, Coccinella septempunctata, is a major natural enemy of aphids in the field and in greenhouses in China and is part of integrated pest management (IPM). Imidacloprid, a highly efficient insecticide that not only kills aphids at lethal concentrations, but also can cause various sublethal effects in nontarget organisms. To strengthen IPM and its sustainability, it is important assessing possible side effects on natural enemies. When the effects of sublethal concentrations (LC5 and 10%LC5) of imidacloprid on Cseptempunctata were evaluated, the adult longevity was shortened by 23.97 and 28.68 %, and the fecundity reduced by 52.81 and 56.09 % compared to control population. In the F1 generation (i.e., the progeny of the exposed individuals), the juvenile development was slower by 1.44 days and 0.66 days, and the oviposition period was shortened by 10 and 13 days, respectively. The fecundity of the F1 generation decreased by 17.88, 44.03 and 51.69 % when exposed to 1%LC5, 10%LC5, and LC5, respectively. The results of demographical growth estimates showed that the intrinsic rate of increase (rm) and net reproductive rate (R0) were lower in Cseptempunctata populations that had been exposed to sublethal concentrations of imidacloprid. The results emphasize the importance of assessing side effects of low imidacloprid concentrations on such predator species, even at the transgenerational level.

Keywords

Generalist predator, Neonicotinoid, Sublethal effects, Transgenerational effects, Population dynamics

Xiao, D., Zhao, J., Guo, X., Chen, H., Qu, M., Zhai, W., Desneux, N., Biondi, A., Zhang, F., and Wang, S. (2016). Sublethal effects of imidacloprid on the predatory seven-spot ladybird beetle Coccinella septempunctata. Ecotoxicology 25, 1782–1793. DOI: 10.1007/s10646-016-1721-z

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