不同温度下5种拟除虫菊酯类农药对家蚕的毒性变化  

Toxicity Variation of Five Pyrethroid Pesticides to Bombyx mori at Different Temperatures

作　　者：李前龙[1] 唐旭东[2] 徐莉[2] 沈中元[1,2] 燕薇[1] 

机构地区：[1]江苏科技大学,江苏镇江212003 [2]中国农业科学院蚕业研究所,江苏镇江212018

出　　处：《蚕业科学》2013年第1期70-75,共6页ACTA SERICOLOGICA SINICA

基　　金：现代农业产业技术体系专项(No.CARS-22);"十二五"国家科技支撑计划项目(No.2011BAD33B04)

摘　　要：拟除虫菊酯类农药对昆虫的毒性具有温度效应。采用食下毒叶法测定5种常用拟除虫菊酯类农药在环境温度35、30、25、20℃时对家蚕的急性毒性。随着温度的升高,5种拟除虫菊酯类农药对家蚕的急性毒性降低,在35℃时溴氰菊酯、氰戊菊酯、联苯菊酯、高效氯氰菊酯和高效氯氟氰菊酯对家蚕2龄幼虫的LD50值与20℃时的LD50值的比值分别为7.63、12.27、8.49、2.76、1.75。研究结果表明,5种拟除虫菊酯类农药对家蚕的急性毒性表现为负温度效应,其中氰戊菊酯对家蚕的毒性受温度的影响最为明显,溴氰菊酯和联苯菊酯较为明显,高效氯氰菊酯和高效氯氟氰菊酯的毒性受温度影响较小。Temperature has an effect on the toxicity of pyrethroid pesticides to insects. The acute toxicities of five commonly used pyrethroid pesticides to silkworm （ Bombyx mori） at 35 ℃, 30 ℃, 25 ℃ and 20 ℃ were evaluated in laboratory by using the feed intake method. The acute toxicities of pyrethroid pesticides to silkworm reduced with the increase of temperature. The LD50 of Deltamethrin, Fenvalerate, Bifenthrin, Beta-cypermethrin and Beta-cyfiuthrin to the results indicated that the acute toxicity of five commonly used pyrethroid pesticides to silkworm behaved as a negative temperature effect, among which the effect of temperature on acute toxicity of Fenvalerate to Bombyx mori is the most obvious, that on Deltamethrin and Bifenthrin is relatively obvious, and that on Beta-cypermethrin and Beta-cyfluthrin is very little.

关 键 词：拟除虫菊酯类农药 家蚕 毒性 温度效应 

分 类 号：S884.92[农业科学—特种经济动物饲养]