Change of AChE's activities in musca domestica with insecticide resistance by different feed method

Objective To offer evidence of prevention of Musca domestica by exploring the principle of different insecticide and different time of Musca domestica fed with insecticide.Methods Musca domestica was fed with insecticides on adulthood and infancy;Median lethal dose(LD_(50)) of different times of Musca domestica was measured;the index of fastness was computed;acetylcholinesterase(AChE) activities of Musca domestica were measured with different level of fastness.Results Activities of AChE of Musca domestica which was brought up with Dichlorvos was enhanced more,while the other two kinds' which was brought up with high effect cypermethrin was enhanced at first and then fell down.Level of fastness of kinds which were fed with insecticide on infancy was enhanced more quickly than that of the other two kinds.Conclusion AChE is the target when dichlorvos is used to bring up fastness of Musca domestica;insecticides should not be used on the infancy of Musca domestica because level of fastness which is fed with insecticide on infancy is enhanced more quickly.