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目的了解淡色库蚊对化学杀虫剂的交互抗性,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3种抗性品系淡色库蚊对5种杀虫剂的抗性。结果DDVP抗性品系淡色库蚊抗性水平为8.38倍,对氯氰菊酯、三氯杀虫酯、残杀威和溴氰菊酯的抗性分别为52.50倍、7.61倍、4.74倍和0.75倍;残杀威抗性品系淡色库蚊抗性水平为11.34倍,对氯氰菊酯、DDVP、三氯杀虫酯和溴氰菊酯的抗性分别为8.08倍、2.85倍、2.00倍和1.80倍;氯氰菊酯抗性品系淡色库蚊抗性水平为243.00倍,对溴氰菊酯、三氯杀虫酯、残杀威和DDVP的抗性分别为28.90倍、17.28倍、1.49倍和1.38倍。结论蚊虫对某种杀虫剂产生抗性后,可能对其它杀虫剂也产生不同的交互抗性,用药前应作抗性测定,注意选择药物品种和确定使用剂量。
Objective To understand the interactive resistance of Culex pipiens pallens to chemical insecticides and provide the basis for the rational and effective chemical control of mosquitoes. Methods The WHO bioassay method was used to determine the resistance of Culex pipiens pallens to five insecticides. Results The resistant level of DDVP-resistant strain Culex pipiens pallens was 8.38-fold, which was 52.50 times, 7.61 times, 4.74 times and 0.75 times higher than those of cypermethrin, trichlorfenicarb, propoxur and deltamethrin respectively. The resistance of Culex pipiens quinquefasciatus was 11.34-fold and its resistance to cypermethrin, DDVP, trichlorfon and deltamethrin was 8.08-fold, 2.85-fold, 2.00-fold and 1.80-fold, respectively. Culex pipiens quinquefasciatus resistance level of 243.00 times, resistance to deltamethrin, chlorfenapyr, propoxur and DDVP were 28.90 times, 17.28 times, 1.49 times and 1.38 times. Conclusion Mosquitoes resistant to certain insecticides may have different cross-resistance to other insecticides. The resistance should be measured before treatment. Attention should be paid to selecting the drug species and determining the dosage.