关键词: 家蝇, 抗性

Abstract: Objective To investigate on insecticide resistance of Musca domestica and to find out its prevention countermeasures.Methods Setting up resistance monitoring points to measure LD₅₀(gamma/each) with micro spot method,and advocating using mixed insecticides or different kinds of insecticides alternately to control the resistance development of theMusca domestica.Results The measurement made on the monitoring points in 11 cities(areas) in Zhejiang province indicated that the LD₅₀(gamma/each Musca domestica) against eight common insecticides deltamethrin,cypermethrin,high effect cypermethrin,permethrin,tetramethrin,EBT,acetophenate and ddvp dichiororphos was respectively 0.005- 0.048 8,0.070- 0.310 7,0.019- 0.138 1,0.015 5- 0.125 8,0.442- 1.541 8,0.115 0- 0.970 3,1.700- 7.997 8 and 0.155 4- 1.575 6.Compared with the LD₅₀ tested in 1981- 1983,the resistance increased respectively by 7.14- 69.71 times,8.43- 37.43 times,7.6- 55.24 times,1.72- 13.98 times,1.89- 6.59 times,0.52- 4.23 times,0.55- 2.42 times and 1.47- 14.86 times.Conclusion The Musca domestica in Zhejiang province has developed high resistance especially to deltamethrin,cypermethrin and high effect cypermethrin.The resistance to permethrin,tetramethrin and ddvp dichiororphos has increased rather slow.No obvious resistance against EBT and acetophenate has been found with sensitive level.It is suggested to enhance study on prevention management and stop using deltamethrin,cypermethrin and high effect cypermethrin so as to inhabit and delay the resistance development of the Musca domestica.