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目的了解吉林省不同地区家蝇对常用3种杀虫剂的抗性状态,为研究防制对策及合理有效使用杀虫剂提供参考。方法采用点滴法对长春市、通化市和四平市3个地区家蝇的半数致死剂量进行测定。结果长春市、通化市和四平市野外家蝇种群对溴氰菊酯、高效氯氰菊酯和敌敌畏的LD50分别为0.021 1~0.068 8、0.049 8~0.224 4、和0.101 0~0.174 8μg/♀。与文献报道的敏感品系试虫进行比较,3个地区野外种群对溴氰菊酯、高效氯氰菊酯和敌敌畏的抗性系数分别为6.59~20.88、8.74~39.37和0.54~0.93。结论长春市、通化市和四平市野外家蝇种群已对溴氰菊酯和高效氯氰菊酯产生不同程度的抗性,应采取科学的方法使用杀虫剂,控制家蝇抗性增长。
Objective To understand the resistance status of housefly to common insecticides in different areas of Jilin Province and to provide references for the study of control strategies and the rational and effective use of insecticides. Methods The half-lethal dose of housefly in Changchun, Tonghua and Siping was determined by using the drip method. Results The LD50 of deltamethrin, beta-cypermethrin and dichlorvos were 0.021 1 ~ 0.068 8, 0.049 8 ~ 0.224 4, and 0.101 0 ~ 0.174 8 μg / kg respectively in the wild flies in Changchun, Tonghua and Siping. The susceptibility coefficients of deltamethrin, beta-cypermethrin and dichlorvos were 6.59-20.88, 8.74-39.37 and 0.54-0.93, respectively, in comparison with the susceptible strains reported in the literature. Conclusion The housefly populations in Changchun, Tonghua and Siping cities have different degrees of resistance to deltamethrin and alpha-cypermethrin. The insecticide should be used in a scientific way to control the growth of housefly.