天然除虫菊素与丁醚脲复配对朱砂叶螨杀螨活性的影响  

Effect of Activity of Natural Pyrethrins and Diafenthiuron Mixture Against Tetranychus cinnabarinus

作　　者：杨振国[1] 谢道燕[1] 达爱斯[1] 倪婧[1] 罗雁婕[1] 

机构地区：[1]云南省农业科学院蚕桑蜜蜂研究所,云南蒙自661101

出　　处：《贵州农业科学》2016年第11期56-60,共5页Guizhou Agricultural Sciences

基　　金：云南省科技计划重点新产品项目"云南重大农业害螨综合防控关键技术研究应用及杀螨剂开发"(2015BB009);云南省农业科学院蚕桑蜜蜂研究所青年创新基金项目"基于家蚕安全性的丁醚脲复配杀螨剂研制"(QC2014003)

摘　　要：为减少化学农药用量,降低农药残留和环境污染,有效控制朱砂叶螨的发生与危害,并为开发除虫菊素与丁醚脲复配杀螨剂提供理论依据,采用玻片浸渍法结合共毒系数法研究天然除虫菊素与丁醚脲混剂对朱砂叶螨的杀螨活性及最佳配比。结果表明：除虫菊素和丁醚脲处理朱砂叶螨雌成螨24h的LC50分别为561.82mg/L和154.67mg/L;除虫菊素与丁醚脲混剂的增效配比为1.55∶1-14.45∶1,共毒系数法评价该配比混剂的防效均呈增效作用,其中,5.42∶1混剂的增效作用最显著,处理朱砂叶螨24h的LC50和共毒系数分别为85.20mg/L和469.31,其毒力分别是单用除虫菊素和丁醚脲的6.59倍和1.82倍。丁醚脲和除虫菊素混剂具有开发潜力。In order to reduce the application of chemical pesticides,pesticide residues and environmental pollution,so as to effectively control the occurrence and harm of T.cinnabarinus,and provide theoretical basis for the exploitation of pyrethrins and diafenthiuron mixed acaricide,Slide-dip method and co-toxicity coefficient method were employed to explore the acaricidal activity and the optimum ratio.Results： The median lethal concentration（LC50）of pyrethrins and diafenthiuron against T.cinnabarinus female adults were 561.82mg/L and 154.67mg/L,respectively.The synergistic mass ratios of pyrethrins and diafenthiuron ranged from 1.55∶1to 14.45∶1,and the effects of mixtures were synergistic via CTC method,and the optimal diafenthiuron-to-pyrethrins ratio was 5.42∶1.At 24 hposttreatment,the LC50 value and co-toxicity coefficient（CTC）of the optimal diafenthiuron-to-pyrethrins ratio against T.cinnabarinus female mites were 85.20mg/L and 469.31,and toxicity relatived to diafenthiuron and pyrethrins were 1.82 and 6.59 times,respectively.All these results indicated that the synergistic activity of natural pyrethrins and diafenthiuron opens an opportunity for developing a new mixture acaricide.

关 键 词：朱砂叶螨 除虫菊素 丁醚脲 共毒系数 杀螨剂 复配农药 

分 类 号：S482.5[农业科学—农药学]