南昌市不同生境家蝇的抗药性及其防制对策

目的了解南昌市不同生境家蝇的抗药性现状,为杀虫剂的合理利用提供科学依据。方法采用微量点滴法。结果南昌市不同生境家蝇对敌敌畏、残杀威、溴氰菊酯、高效氯氰菊酯、高效氟氯氰菊酯和右旋苯醚菊酯均产生了不同程度的耐药性或抗药性。垃圾中转站家蝇种群对上述杀虫剂的LD50值分别为0.1664、31.9389、0.0348、0.0498、0.0059、0.2551μg/只;农贸市场家蝇种群的LD50值分别为0.1447、40.7779、0.0581、0.0421、0.0283、0.1722μg/只;餐饮业家蝇种群的LD50值分别为0.1873、51.7781、0.0066、0.0129、0.0102、0.1990μg/只;居民区家蝇种群的LD50值分别为0.2828、39.8730、0.0416、0.0798、0.0490、0.2342μg/只。结论南昌市不同生境家蝇对敌敌畏属于中、高抗水平,对残杀威有一定的耐药性,对拟除虫菊酯类杀虫剂的抗性水平差别较大。建议遵循综合治理的原则,科学合理的用药,以延缓或避免抗性的发生发展,达到有效地控制家蝇种群的目的。

Drug resistance of Musca domestica in different habitats in Nanchang and the corresponding control measures

Objective The current drug resistance of Musca domestica in different habitats in Nanchang was determined to provide the basis for proper administration of pesticides.Methods The micro-drop method was applied.Results The M.domestica in different habitats in Nanchang had developed varying degrees of tolerance or resistance to dichlorvos,propoxur,deltamethrin,beta-cypermethrin,beta-cyfluthrin and d-phenothrin.The LD50 of the M.domestica strains from the refuse transfer stations were 0.1664,31.9389,0.0348,0.0498,0.0059 and 0.2551 μg per fly,respectively;the LD50 of the M.domestica strains from the farmer＇s markets were 0.1447,40.7779,0.0581,0.0421,0.0283 and 0.1722 μg per fly;those of the strains in catering industry were 0.1873,51.7781,0.0066,0.0129,0.0102 and 0.1990 μg per fly;and those of the strains from the residential areas were 0.2828,39.8730,0.0416,0.0798,0.0490 and 0.2342 μg per fly.Conclusion The M.domestica in different habitats in Nanchang demonstrated intermediate to high resistance to dichlorvos but low tolerance to propoxur,as well as varying resistance to pyrethroid insecticides.Therefore,it is recommended to adopt integrated control measures and scientifically and properly administer pesticides in order to delay or avoid the occurrence and development of drug resistance in houseflies for effective control of M.domestica populations.