印楝素与高效氯氰菊酯混剂对菜青虫毒力最佳配比的筛选  

Screening of the Optimum Mixing Proportion of Azadirachtin and High-active Cypermethrin Mixture for Its Toxicity against Pieris rapae L.

作　　者：高志强[1] 宋仲容[1] 何家洪[1] 王林[1] 

机构地区：[1]重庆文理学院化学与环境科学系,重庆402168

出　　处：《安徽农业科学》2008年第1期117-118,共2页Journal of Anhui Agricultural Sciences

基　　金：重庆市教育委员会资助项目(KJ061206)

摘　　要：[目的]为探索印楝素与高效氯氰菊酯的互作规律。[方法]采用浸叶法测定印楝素与高效氯氰菊酯混配后对防治菜青虫3龄幼虫的增效作用及2种药剂混配的最佳配比。[结果]结果表明:当印楝素/高效氯氰菊酯位于11.20∶7.50和8.00∶12.50之间时,混配药剂表现出明显增效作用;而当2种药剂之比为8.64∶11.50时,增效作用最强,此时的共毒系数最高为147。[结论]该研究确认了混配的最佳配比及两者各自的含量,为田间试验提供了依据。[Objective] The research aimed to explore the interaction laws of azadirachtin and high-active cypermethrin. [ Method] The synergism of mixing azadirachtin with high-active cypermethrin against the 3rd-instar larvae of Pieris rapae L and the optimum mixing proportion of 2 kinds of medicaments were determined by leaf dipping method. [ Result] When the proportion of azadirachtin to high-active cypermethrin was from 11.20：7.50 to 8,00：12.50, the mixed medicament showed an obvious synergism, When the proportion of azadirachtin to high-active cypermethrin was 8,64： 11.50, the synergism was strongest and here the co-toxicity coefficient was highest （147）. [ Conclusion] This research confirmed the optimum mixing proportion and each contents of mixture and provided basis for field experiment.

关 键 词：印楝素 高效氯氰菊酯 菜青虫 毒力测定 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治]