关键词: 溴氰菊酯, 中华按蚊, 卵期, 幼虫期, 蛹期

Abstract: This paper presents the results of resistant strain of Anopheles sinensis cultured with deltamethrin. After 5-10 generations, low resistance induced. 10 generations later, gene mutation oceurred, while in 29th genaration, larva of black body and head with lethal gene and moreover with mutated organs were found.Mortality rate of black body larvaes reached 100% and of course, reproduction stopped. Mortality rate of black head larvaes was 65.98% and it has been preliminarily confirmed by inbred that characteristic of black head belonged to recessive reversion. The existence of lethal gene lovered the survival ability of An.sinensis, which led to the reduction of resistance to deltamethrin in population of An. sinensis with lethal gene. When disappearance of black body larvaes and remarkable reduction of bfack head ones happened, LC50 of An.sinensis larvaesstarted going up.