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Effects of the mixed biocide Bacillus thuringiensis-abamectin on the development of the parasitoid Microplitis mediator and its host Helicoverpa armigera

文献类型： 外文期刊

作者： Wanna, Ruchuon 1 ; Xu, Zhihong 1 ; Liu, Yahui 2 ; Yu, Haixin 1 ; Ren, Lijun 1 ; He, Lihua 3 ; Li, Jiancheng 4 ;

作者机构： 1.Zhejiang Univ, Inst Insect Sci, Coll Agr & Biotechnol, Hangzhou 310029, Zhejiang, Peoples R China

2.Zhejiang Agr & Forestry Univ, Sch Agr & Food Sci, Dept Plant Protect, Linan 311300, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Silkworm & Mulberry Tree, Hangzhou 310021, Zhejiang, Peoples R China

4.Hebei Acad Agr & Forestry, Inst Plant Protect, Baoding 071001, Peoples R China

关键词： biocide Bacillus thuringiensis abamectin: BtA;pesticide;insecticide;efficacy

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：2.25； 五年影响因子：2.184 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The effects of the mixed biocide Bacillus thuringiensis Berliner with abamectin (BtA) on the development of the parasitoid Microplitis mediator (Haliday) (Hymenoptera: Braconidae) and its cotton bollworm host, Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae), were evaluated in the laboratory. Weight gain in larvae of H. armigera was initially delayed, but larval developmental period increased and pupal weight increased when they were fed on a diet containing BtA. Due to increased longevity of the host larvae, the susceptible period to parasitization of H. armigera by M. mediator increased when the host larvae were reared on diets containing BtA at concentrations of 0.5, 1, 2, and 4 mu g g-1. The longevity of female and male parasitoids significantly decreased when newly emerged wasps were fed a honey solution containing 200 mu g ml-1 BtA in comparison with those fed only a honey solution. Mean longevity was significantly prolonged when parasitoids were fed a honey solution and BtA-honey solution in comparison with those fed BtA-distilled water, distilled water, or nothing. There were no significant differences compared with the control in any biological characteristics for the offspring of female parasitoids fed the honey solutions containing BtA at concentrations of 50, 100, and 200 mu g ml-1; characteristics measured include the egg-larval period, pupal weight, male and female pupal periods, adult fresh weight, and adult longevity. When female parasitoids parasitized host larvae that had been fed the diet containing BtA, their male and female pupal periods were significantly prolonged compared with the control (without BtA).

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