目的探讨经敌敌畏选育家蝇对常用杀虫剂的交互抗性,为合理使用杀虫剂提供依据。方法采用微量点滴法。结果敌敌畏、乙酰甲胺磷、残杀威、高效氯氰菊酯对家蝇的抗性系数分别为19.61、6.81、9.81、9.86。结论当家蝇对敌敌畏杀虫剂产生抗性以后,对乙酰甲胺磷、残杀威和高效氯氰菊酯均产生了交互抗性。 Objective To explore the interactive resistance of house flies to commonly used insecticides by dichlorvos and to provide a basis for rational use of insecticides. Methods using micro-drip method. Results The resistance coefficients of dichlorvos, acephate, propoxur and beta-cypermethrin to housefly were 19.61, 6.81, 9.81 and 9.86, respectively. Conclusion When houseflies were resistant to dichlorvos insecticides, they developed cross-resistance to acephate, propoxur and beta-cypermethrin.