吡虫啉与丁醚脲、溴虫腈混配对桃蚜毒力最佳配比筛选及田间防效研究  

Screening of Optimal Ratios and Field Efficacy of Mixtures of Imidacloprid, Diafenthiuron and Chlorfenapyr against Myzus persicae

作　　者：申君[1] 夏耀民[1] 李建洪[1] 

机构地区：[1]华中农业大学植物科学技术学院,武汉430070

出　　处：《农药研究与应用》2012年第5期8-11,共4页Agrochemicals Research & Application

基　　金：公益性行业(农业)科研专项(200903033)

摘　　要：为延缓桃蚜Myzus persicae(Sulzer)抗药性的产生和发展,采用叶片浸渍法对吡虫啉、丁醚脲和溴虫腈等3种杀虫剂进行联合毒力测定,筛选出吡虫啉·丁醚脲(有效成分比1∶8.5)和吡虫啉·溴虫腈(有效成分比1∶3.8)这两个具有明显增效作用的最佳配比,它们的共毒系数(CTC)分别为250.11和201.51。田间试验结果表明:吡虫啉·丁醚脲混配剂量14g/667m2,药后7d对桃蚜的校正防效为92.62%;吡虫啉·溴虫腈混配剂量3g/667m2,药后7d对桃蚜的校正防效为90.85%。Synergistic effects of binary mixtures of imidacloprid, diafenthiuron or chlorfenapyr were determined by leaf-dipping method to delay the production and development of insecticide resistance for Myzus persicae. The optimal ratios for imidacloprid.diafenthiuron （1：8.5） and imidaeloprid-ehlorfenapyr （1：3.8） were screened with evident synergistic activity, and their co-toxicity coefficients （CTC） were 250.11 and 201.51, respectively. The field trials showed that the calibration control efficacy of imidacloprid.diafenthiuron and imidacloprid-chlorfenapyr against green peach aphid was 92.62% and 90.85%, respectively at the application rate of 14 g/667 m2 and 3 g/667 m2 on the 7 th day after spraying.

关 键 词：桃蚜 共毒系数 混配 田间防效 吡虫啉 丁醚脲 溴虫腈 

分 类 号：S482.3[农业科学—农药学]