目的 了解山东省东平湖淡色库蚊对常用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治提供依据。方法 采用WHO生物测定方法,测定2010-2011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, 2010年分别为106.40、4.30、110.75、0.60和4.09倍, 2011年分别为 94.30、2.70、112.33、0.61和2.91倍。DDVP＋三氯杀虫酯、残杀威＋三氯杀虫酯复配增效系数分别为164.39～171.08 和 188.28～221.84。结论 山东省东平湖淡色库蚊对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。

Objective To investigate the resistance of Culex pipiens pallens to five commonly used chemical insecticides in Dongping Lake area of Shandong province, China and to provide a basis for proper and efficient chemical control of mosquitoes. Methods From 2010 to 2011, the WHO bioassay was used to determine the susceptibility of field populations of Cx. pipiens pallens to five insecticides, and the coefficients of synergism between insecticides were calculated. Results Among the field populations of Cx. pipiens pallens, the resistance ratios for cypermethrin, propoxur, deltamethrin, acetofenate, and DDVP were 106.40, 4.30, 110.75, 0.60, and 4.09, respectively, in 2010 and were 94.30, 2.70, 112.33, 0.61, and 2.91, respectively, in 2011. The coefficients of synergism between DDVP and acetofenate and between propoxur and acetofenate were 164.39-171.08 and 188.28-221.84, respectively. Conclusion Cx. pipiens pallens in Dongping Lake area of Shandong province shows different degrees of resistance to five commonly used chemical insecticides. Therefore, insecticide mixture, as well as joint use of insecticides and synergistic agents, should be employed to prevent or delay the emergence and development of insecticide resistance in mosquitoes.