盐城市区德国小蠊对常用杀虫剂的抗药性测定

Resistance of Blattella germanica to common used insecticides in Yancheng city

目的测定盐城市区蟑螂对溴氰菊酯、敌敌畏、残杀威、乙酰甲胺磷、高效氯氰菊酯5种杀虫剂的抗药性,以便通过抗药性水平在全市开展有效、科学的灭蟑工作。方法采用500 ml三角烧瓶药膜接触法,测定德国小蠊半数击倒时间。结果现场德国小蠊对上述5种杀虫剂的抗性系数分别为0.16、5.43、0.0013、1.13和11.03。盐城市区德国小蠊对高效氯氰菊酯为高抗性,对敌敌畏为中度抗性,对乙酰甲胺磷为低度抗性,而对溴氰菊酯、残杀威敏感。结论应该根据抗药性合理选择杀虫剂,以提高蟑螂的防治效果。

Objective To determine resistance of Blattella germanica to deltamethrin, dichlorvos , propoxur, acephate, high effect cypermethrin in Yancheng city, and develop scientifical and reasonable work of killing cockroaches. Methods Using the method of medicine membrane - touching in 500 ml flask to find out the KT50 of Blattella germanica. Results The resistance index of field collected strains of Blattella germanica to above mentioned insecticides were 0. 16,5.43.0. 0013,1.13 and 11.03. Blattella germanica in Yancheng city showed high resistance to high effect cypermethrin, middle resistance to dichlorvos ,low resistance to acephate and sensitive to deltamethrin and propoxur. Conclusion It is necessary to select appropriate insecticides according to the situation of resistance so as to improve cockroach control effect.