抗性品系家蝇对常用杀虫剂交互抗性的研究

目的 探讨3个抗性品系家蝇对5种杀虫剂的交互抗性，为合理使用杀虫剂提供依据。方法 采用微量点滴法。结果 抗DDVP品系达14．71倍的抗性，而对氯菊酯、巴沙的交互抗性分别为93．49倍和7．103倍，而对氯氰菊酯基本没有交互抗性，对DIT为0．16倍，呈负交互抗性。抗巴沙品系达5．05倍，对氯菊酯、DDVP的交互抗性为4．07倍和2．78倍，对DDT基本无交互抗性，对氯氰菊酯呈负交互抗性。抗氯菊酯品系达223．09倍的抗性，对氯氰菊酯、DDT的交互抗性为6．63倍及9．20倍，而对DDVP、巴沙基本无明显交互抗性。结论长期使用一种杀虫剂容易产生抗性，亦可能对其它杀虫剂产生交互抗性，用药时应注意种类的选择，合理使用杀虫剂。

Cross-resistance of Musca domestica to common used insecticides

Objective To study the cross-resistance of three resistant strains of Musca domestica to five kinds of insecticides and supply evidence for using insecticides reasonably.Methods Topical application method. Results The results showed that DDVP-resistant strain was crossly resistant to BPMC and Permethrin. Musca domestica had no resistance to cypermethrin. The coefBcient of and-DDT was 0.16. It showed negative resistance cross BPMC-resistant strain was crossly resistant to DDW and Permethrin. And Permethrin-resistant strain was crossly resistant to Cypermethrin and DDT. Negative cross-resistance was found in DDVP-resistant strain with DDT, BPMC-resistant strain with Cypermethrin. Conclusion Cross-resistance appeared when a single kind of insecticide was used for a long time. It was necessary to use insecticides reasonably.