关键词: 家蝇, 抗性发展, 分析

Abstract: This paper describes the resistance of housefly to deltamethrin, permethrin and DDV in Shanxi during 1985～1993.The results showed that the resistance development of housefly to deltamethrin had two stages.In the first stage of 1985-1990, the resistance increased more quickly, and it increased smoothly in the second stage of 1991-1993.That was because deltametherin was used widely in the earlier stage, but controlled in later and mixed with other insecticides. There were also two sages in the resistance development of permethrin.The first stage, 1985-1990, its resistance formed and developed very slowly; the second Stage, 1990-1993, it developed very rapidly.This was attributed to the short period of use and to its properties.Resistance of DDV could not be definitlydivided into stages and showed a slow increase which was less than mean value of LD₅₀ in our country.