上海市宝山区家蝇对3种常用杀虫剂的抗药性调查

Resistance of Musca domestica to three kinds of normal used insecticides in Baoshan district of Shanghai

目的了解2010年上海市宝山区家蝇对敌敌畏、甲基嘧啶磷、溴氰菊酯的抗性情况。方法微量点滴法。结果上海市宝山区的家蝇对3种常用杀虫剂的抗性水平均不同:家蝇对敌敌畏的抗性属低抗水平,LD50为0.344 996μg/只;对甲基嘧啶磷的抗性属中抗水平,LD50为0.989 695μg/只;对溴氰菊酯的抗性属高抗水平,LD50为0.028 733μg/只。结论上海市宝山区家蝇对3种杀虫剂存在不同程度的抗性,对溴氰菊酯与甲基嘧啶磷产生了明显的抗性,而对敌敌畏相对敏感,应通过交替、轮换和复配使用杀虫剂,控制和延缓抗药性发展。

Objective To investigate the resistance of Musca domestica to dichlorovos,pirimiphos-methyl and deltamethrin in baoshan district of Shanghai in 2010.Methods Topical application method was used.Results The results showed that Musca domestica had different resistant levels to these three insectieides.The resistance of Musca domestica field population to dichlorovos was on the low level,LD50 of dichlorovos was 0.344 996 μg/insect.Furthermore,the resistance to pirimiphos-methyl was on the medium level,LD50 of pirimiphos-methyl was 0.989 695 μg/insect.Moreover,the resistance to deltamethrin was on the high level,LD50 of deltamethrin was 0.028 733 μg/insect.Conclusion Musca domestica had developed marked resistance to deltamethrin and pirimiphos-methyl,but Musca domestica was susceptible to dichlorovos.In order to control and delay resistance,insecticides should be alternated or combined for controlling Musca domestica in these areas.