单县淡色库蚊对常用杀虫剂的抗药性调查

目的了解山东省单县淡色库蚊对常用5种化学杀虫剂的抗性状况,为合理有效地进行蚊虫化学防制提供依据。方法采用WHO生物测定方法,测定2012~2013年淡色库蚊敏感品系和现场种群对5种杀虫剂的抗性及增效系数。结果现场淡色库蚊种群对氯氰菊酯、残杀威、溴氰菊酯、三氯杀虫酯、DDVP的抗性指数,2011年分别为395.60、3.20、238.33、4.24和8.27倍,2012年分别为339.30、2.70、254.00、4.01和7.19倍。DDVP+三氯杀虫酯、残杀威+三氯杀虫酯复配增效系数分别为160.27~173.82和190.22~230.47。结论单县境内淡色库蚊对5种常用化学杀虫剂均产生不同程度的抗药性,应采取多种杀虫剂复配和增效剂与杀虫剂合用措施,以克服或延缓蚊虫抗药性的产生和发展。

Study on resistance of Culexpipiens pallens to insecticides in Shanxian County of Shandong province

Objective To investigate the resistance of Culex pipiens pallens to five chemical insecticides commonly used in Shanxian County in Shandong province, and to provide basic information for proper and efficient control of mosquito Vectors. Methods WHO bioassay was used to test the resistance and coefficient of synergism of field populations of Cx. pipiens pallens to five kinds of insecticides in Shnxian County from 2011 to 2012. Results Of the five field popnlations of Cx. pipiens pallens, resistance indexes for eypermethrin, propoxur, deltamethrin, aeetofenate, and DDVP were 395.60, 3.20, 238.33, 4.24 and 8.27 in 2011, respectively; and were 339.30, 2.70, 254.00, 4.01and 7.19 in 2012, respectively. The coefficient of synergism of DDVP and acetofenate, propoxur and aeetofenate were 160.27 - 173.82 and 190.22 - 230.47, respectively. Conclusion Cx. pipiens pallens in Shanxian County has showed different degrees of resistance to five commonly used chemical insecticides. Therefore, insecticide mixtures and synergistic agents should be used to delay and prevent the emergence and development of insecticidal resistance.