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Sublethal Effects of Insecticide Exposure on Megacopta cribraria (Fabricius) Nymphs: Key Biological Traits and Acetylcholinesterase Activity

文献类型： 外文期刊

作者： Miao, Jin 1 ; Reisig, Dominic D. 2 ; Li, Guoping 1 ; Wu, Yuqing 1 ;

作者机构： 1.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450002, Peoples R China

2.North Carolina State Univ, Dept Entomol, Vernon James Res & Extens Ctr, 207 Res Stn Rd, Plymouth, NC 27962 USA

关键词： insecticide;nymphal developmental time;longevity;hormesis;fecundity

期刊名称：JOURNAL OF INSECT SCIENCE （ 影响因子：1.857； 五年影响因子：1.904 ）

ISSN： 1536-2442

年卷期： 2016 年 16 卷

页码：

收录情况： SCI

摘要： Megacopta cribraria F. (Hemiptera: Plataspidae), the kudzu bug, is an invasive insect pest of U.S. soybean. At present, insecticide application is the primary and most effective control option for M. cribraria. In this study, the potential effects of sublethal and low-lethal concentrations (LC10 and LC40) of three common insecticides on key biological traits and acetylcholinesterase (AChE) activity of the treated nymphal stage of insect were assessed. The results show that the sublethal concentration of imidacloprid significantly reduced adult emergence rate of M. cribraria. A low-lethal concentration of imidacloprid significantly increased nymphal development time, but significantly decreased adult emergence rate and adult longevity. Both sublethal and low-lethal concentrations of acephate caused an increase in nymphal development time and a reduction in adult emergence rate and adult longevity. Fecundity of females was significantly reduced only by exposure to low-lethal concentrations of acephate. Sublethal and low-lethal concentrations of bifenthrin increased nymphal development time, but significantly decreased adult emergence rate. In addition, we found that the AChE activity of M. cribraria was significantly increased only by LC40 imidacloprid, but strongly inhibited by acephate.

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