5种杀虫剂对甘蓝蚜和瓢虫的选择性毒力及田间防效  

Selective Toxicity Tests and Field Trials of 5 Kinds of Insecticide to Brevicoryne brassicae and Ladybeetles

作　　者：王圆圆[1] 刘廷辉[1] 李静[1] 董建臻[1] 周婷[1] 张丹丹[1] 

机构地区：[1]河北农业大学植物保护学院,河北保定071000

出　　处：《农药》2012年第11期829-831,857,共4页Agrochemicals

基　　金：河北省科技支撑项目(12220302D)

摘　　要：[目的]筛选防治甘蓝蚜的高效、低毒药剂。[方法]测定了5种杀虫剂对甘蓝蚜与瓢虫的选择性毒力和田间防效以及2%阿维菌素EC对甘蓝蚜室内毒力的温度效应。[结果]40%氯虫.噻虫嗪WG对甘蓝蚜的毒力最强,LC50值为1.9355 mg/L;对异色瓢虫2龄幼虫/甘蓝蚜、龟纹瓢虫成虫/甘蓝蚜的选择性毒力比值分别为16.34和18.28;对田间甘蓝蚜毒力的速效性和持效性强,3 d后药效一直维持在90%以上。[结论]防治甘蓝蚜最适药剂为40%氯虫.噻虫嗪WG,2%阿维菌素EC作为生物农药对甘蓝蚜的毒力具有正温度效应。[Aims] The optimal insecticide against Brevicoryne brassicae was screened out with high efficiency and low toxicity.[Methods] The selective toxicities and field control effects of 5 insecticides to B.brassicae and ladybeetles were studied,and the toxicity of abamectin 2% EC was determined under different temperatures.[Results] The results showed that chlorantraniliprole thiamethoxam 40% WG had the highest toxicity to B.brassicae with LC50 of 1.935？5 mg/L,the selective toxicity ratio（STR,Harmonia axyridis Pallas LC50/B.brassicae LC50 and Propylaea japonica Thunberg LC50/B.brassicae LC50） was 16.34 and 18.28,and it had fast effect and residual effect to field B.brassicae with the efficacy of more than 90% after 3 days after treatment.[Conclusions] The optimal insecticide against B.brassicae was chlorantraniliprole thiamethoxam 40% WG,abamectin 2% EC showed the positive temperature effect as a kind of biological pesticide.

关 键 词：甘蓝蚜 杀虫剂 选择性毒力 温度效应 田间防效 

分 类 号：S482.3[农业科学—农药学]