关键词: 家蝇, 点滴法, 喂饲法, 毒性检测

Abstract: Objective To compare the efficiency of insecticides toxicity to different houseflies strains with two methods.Methods Using topical application method and feeding test method to test the efficiency of insecticide toxicity to different houseflies strains.Results To laboratory sensitive strains(Lab),the ratio of the topical application bioassay comparing with the feeding bioassay ranged from 0.48 to 1.69 at LD₅₀/L₅₀.To Lamda-cyhalothrin resisitant strains (Cyh-R),the ratio ranged from 0.71 to 87.13 at LD₅₀/LC₅₀,for male houseflies of(Cyh-R) strains the difference was relatively small.Conclusion For susceptible housefly strains,the insecticide toxicity can be tested using topical application method or feeding test method,the results is similar.But for resistance strains,two methods should be used,especially for insecticide for baits formulations.