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目的了解武汉市白纹伊蚊对5种卫生杀虫剂的抗性情况,为科学使用杀虫剂提供依据。方法采用世界卫生组织提供的幼虫浸渍法,测定4龄蚊幼虫的半数致死浓度(LC50),评价卫生杀虫剂的抗药性。结果白纹伊蚊野外种群对双硫磷、溴氰菊酯、高效氯氰菊酯和仲丁威的LC50分别为0.001 3、0.001 4、0.005 1和1.568 5 mg/L,是敏感品系的4.3、1.4、2.4和1.0倍。三氯杀虫酯的抗性极高,超出可测定范围。结论监测武汉市野外白纹伊蚊对常用卫生杀虫剂的抗药性水平及变化趋势对于防控登革热意义重大。在灭蚊工作中应采取综合性防治措施,科学合理地使用杀虫剂。
Objective To understand the resistance of Aedes albopictus to five kinds of insecticides in Wuhan and provide basis for the scientific use of insecticides. Methods The larvae immersion method provided by the World Health Organization (WHO) was used to determine the median lethal concentration (LC50) of 4th instar mosquito larvae and to evaluate the drug resistance of hygienic insecticides. Results The LC50 of Aedes albopictus in the field were 0.001 3,0.001 4,0.005 1 and 1.568 5 mg / L respectively for tenephos, deltamethrin, alpha-cypermethrin and sec-butyl-D, 2.4 and 1.0 times. Trichloro insecticide resistance is extremely high, beyond the measurable range. Conclusion It is of great significance to monitor the level and trend of drug resistance of common Aedes albopictus to common sanitation insecticides in Wuhan. In the anti-mosquito work should take comprehensive prevention and control measures, scientific and rational use of pesticides.