关键词: 溴氰菊酯, 微小按蚊, 生理活动, 繁殖力

Abstract: Anopheles minimus were forced in contact with deltamethrin and selected according to the method recommended by WHO, the dose of deltamethrin being 1mg/m², laboratory temperature approximately 26℃ and the motality 24 hours after contact with the drug no less than 20%. In the course of selection, dynamic observation was made on the physiological activities and reproductive characters of the selected mosquitoes. It was shown that although the body weight, blood feeding behavior and longevity of the mosquito remained unchanged after long-term contact with a low concentration of deltamethrin, there was a marked decrease in the deposition of eggs and their hatching rate, while the lethal coefficient(K)was increased. The preimaginal period was prolonged, and the net reproductive rate(Ro), innate capacity for increase (Rm)and finite rate of natural increase(λ)were all decreased. All these factors would undoubtedly have an influence on the reproduction capacity of the survival offsprings of the mosquito population.