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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (36): 251-254.

• 植物保护 农药 • 上一篇    下一篇

王运儒 曾鑫年 王华堂 王惠杉   

  • 收稿日期:2012-03-19 修回日期:2012-04-25 出版日期:2012-12-25 发布日期:2012-12-25

Synergism of Rotenone and Azadirachtin Against Larvae of Diamondback Moth.

  • Received:2012-03-19 Revised:2012-04-25 Online:2012-12-25 Published:2012-12-25

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摘要：

为了对开发植物源农药提供理论依据，研究鱼藤酮和印楝素复配对小菜蛾幼虫的协同增效作用。在室内条件下测定了鱼藤酮与印楝素及其复配组合对小菜蛾2龄幼虫的毒力和拒食活性。结果表明：当鱼藤酮与印楝素以质量比为1:7复配处理时，对小菜蛾幼虫具有明显的协同增效作用，其LC50为49.72 mg/L，共毒系数为322.96。当鱼藤酮和印楝素以质量比为7:1复配处理小菜蛾幼虫时，拒食中浓度为22.19 mg/L，共毒系数最为292.22，增效作用最强。

关键词: 湖南, 湖南

Abstract:

The research aimed to determine the common-toxicity of the mixture of rotenone and azadirachtin and provide theoretical basis for developing natural pesticides. The antifeeding and contacting activities of rotenone and azadirachtin and their admixture against the 2rd-instar larvae of Diamondback Moth were conducted in laboratory. The results showed that a 1:7 mixture of azadirachitin and rotenone was the most synergetic with a co-toxicity coefficient of 322.96. On this condition the admixture had the most synergistic effect, the LC50 was 49.72 mg/L for up to 48 h. The admixture produced amaximum anti-feeding effect and the AFC50 was 22.19 mg/L when the admixture was blended with rotenone and azadirachitin at the ratio of 7:1. On this condition was the most synergetic with a co-toxicity coefficient of 292.22.