关键词: 家蝇, 抗性, 综合防制

Abstract: Objective:The resistances of house flies could be controlled by the way of the comprehensive controlling measures and the changed or mixed employment of insecticide,And then the effect of insecticide could be enhanced.Methods:The surveillance net has been built,and the changes of resistance on flies to insecticide were measured by dropping-test-way.Result:According to the data of resistance on flies form1997 to 1999,it was observed thatLD₅₀ of DDVP,permethrin,deltamethrin were0.1854,0.0409,0.0077(μg/per.insect) respectively,Which was 3.94,1.03,4.65,1.98times higher than that of the years from 1982to1985,7.00and 3.5times higher than that of the years from 1991 to 1992.LD₅₀ of cypermethrin to house flies were varied from0.0390to0.0774μg per-insect at the basis of cypermethrin resistances surveillance on fly.Conclusion:It was indicated that rational employment of insecticides could enhance effects on house flies and inhibit or delay developing of the resistances on house flies.