溴虫腈、茚虫威与氟啶脲混配对小菜蛾毒力最佳配比筛选及田间防效研究  

Screening of optimum proportion and field effect of mixtures of chlorfenapyr,indoxacarb and chlorfluazuron against Plutella xylostella

作　　者：吕桂贞[1] 余明华 邱浩[1] 毕道芬[1] 王一喆[1] 游红[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 [2]湖北省武穴市梅川镇农业技术推广服务中心,武穴435400

出　　处：《应用昆虫学报》2011年第2期306-312,共7页Chinese Journal of Applied Entomology

基　　金：公益性行业(农业)科研专项(200803001)

摘　　要：为了延缓小菜蛾Plutella xylostella(L.)抗药性的产生和发展,本研究选用常用的3种化学杀虫剂,即氟啶脲、溴虫腈、茚虫威,采用交互测定法进行了最佳配比的筛选,并根据孙云沛法计算其共毒系数,最后筛选出具增效作用的混配配方,氟啶脲∶溴虫腈(有效成分含量为13.20∶1.72),共毒系数为241;氟啶脲∶茚虫威(有效成分含量为2.20∶3.60),共毒系数为142。田间试验结果表明氟啶脲与溴虫腈混配2000倍液药后7d校正防效为84.24%,与其他处理的校正防效具有极显著差异;氟啶脲与茚虫威混配1000倍液药后7d校正防效为85.08%,与其他处理的校正防效有显著性差异。To develop strategies to control the resistance of the diamondback moth（DBM） to insecticides,the effectiveness of mixtures of chlorfluazuron,chlorfenapyr and indoxacarb were evaluated.The results show that a ratio of 13.20：1.72 chlorfluazuron to chlorfenapyr was optimal and that this blend had synergic action and a co-toxicity coefficient（CTC） of 241.The optimal ratio of chlorfluazuron and indoxacarb was 2.20：3.60;this also had synergic action and a CTC of 142.Results of field trials indicated that dilute mixtures of chlorfluazuron and chlorfenapyr and chlorfluazuron and indoxacarb reduced DBM abundance by 84.24% and 85.08% respectively 7 days after spraying.These results were significantly greater than those achieved by the other treatments.

关 键 词：小菜蛾 氟啶脲 共毒系数 混配 田间防效 

分 类 号：S482.3[农业科学—农药学]