8为掌握城市家蝇对常用化学杀虫剂的抗性发展情况 ,给合理使用杀虫剂提供科学依据 ,于 1999年用 5种杀虫剂测定了 3城市家蝇的抗药性。1　材料和方法1.1　测试材料　 1%溴氰菊酯、1%氯氰菊酯、1%胺菊酯、1%敌敌畏、5 %敌百虫标准液及微量点滴器 ,均由中国科学院动物研究所药剂 In order to understand the development of resistance to commonly used chemical pesticides in urban housefly, and to provide a scientific basis for the rational use of insecticides, the resistance to housefly in three cities was determined with five insecticides in 1999. 1 Materials and methods 1.1 Test Materials 1% deltamethrin, 1% cypermethrin, 1% tetramethrin, 1% dichlorvos, 5% trichlorfon standard solution and trace drip, by the Institute of Zoology Chinese Academy of Sciences Pharmacy