Sublethal effects of imidacloprid on the predatory seven-spot ladybird beetle Coccinella septempunctata

文献类型： 外文期刊

第一作者： Xiao, Da

作者： Xiao, Da;Zhao, Jing;Guo, Xiaojun;Zhang, Fan;Wang, Su;Chen, Hongying;Qu, Mengmeng;Zhai, Weigang;Desneux, Nicolas;Biondi, Antonio

作者机构：

关键词： Generalist predator; Neonicotinoid; Sublethal effects; Transgenerational effects; Population dynamics

期刊名称：ECOTOXICOLOGY （ 影响因子：2.823； 五年影响因子：2.958 ）

ISSN： 0963-9292

年卷期： 2016 年 25 卷 10 期

页码：

收录情况： SCI

摘要： 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 C. septempunctata 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 F-1 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 F-1 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 (r (m) ) and net reproductive rate (R (0) ) were lower in C. septempunctata 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.

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