苏州市德国小蠊抗性及其消退的研究

Resistance and its abatement of Blattella germanica in Suzhou urban districts

目的了解苏州市德国小蠊抗性现状及抗性消退情况,为城市蟑螂防制提供依据。方法采用药膜接触法。结果苏州市德国小蠊对敌敌畏的抗性系数大于66.85,对残杀威、氯菊酯、氯氰菊酯和溴氰菊酯的抗性系数分别是1.20、5.66、5.14和5.10。经2年正常培养后,德国小蠊对后4种药物的抗性消退率分别为82.75%、76.26%、76.68%、87.77%。结论苏州市德国小蠊对残杀威敏感,敌敌畏产生高抗性,对另外3种药物产生一定程度抗性。2年后,抗性消退70%以上。

Objective To understand the resistance and its abatement of Blattella germanica in Suzhou urban districts. Methods Making Blattella germanica contact the insecticide in the bottle covered with the insecticides. Results The resistance ratio of the field - collected strains to DDVP 〉 66. 85, and to propoxur, permethrin, cypermethrin and dehamethrin were 1.20, 5.66, 5. 14 and 5. 10 respectively. After 2 years, the resistance abatement ratio to four kinds of insecticide mentioned above were 82. 75%, 76. 26%, 76. 68% and 87.77% respectively. Conclusion The field-collected strains of Blattella germanica in Suzhou urban districts was susceptible to propoxur. It had high resistance to DDVP,and was resistant to the other three kinds of insecticide in varying degree. Two years later, the resistance abatement ratio was above 70%.