The resistance of four field strains of house fly in Liaoning to Deltamethrin, Alphamethrin, permethrin and Dichlorovos was tested by micro-drop way.

• 目的:了解辽宁省家蝇对常用杀虫剂的抗药性状况。方法:常规点滴法。结果:在供试的4种杀虫剂中,以溴氰菊酯的抗药性最为突出,4地家蝇对该杀虫剂的抗性系数分别为118。3、59。7、34。