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目的了解广东省广州、佛山和潮州白纹伊蚊对3种常用杀虫剂敌敌畏、残杀威和高效氯氰菊酯的抗药性。方法采用幼虫浸渍法监测广州、佛山和潮州白纹伊蚊幼虫的抗药性。结果广州市白纹伊蚊对敌敌畏、残杀威和高效氯氰菊酯的LC50分别为0.226、3.894和0.407 mg/L,抗性倍数分别为1.19、1.62和2.88倍;佛山市白纹伊蚊对敌敌畏、残杀威和高效氯氰菊酯的LC_(50)分别为0.170、3.153和0.112 mg/L,抗性倍数分别为0.89、1.31和0.79倍,潮州市白纹伊蚊对敌敌畏、残杀威和高效氯氰菊酯的LC_(50)分别为0.152、1.400和0.053 mg/L,抗性倍数为0.80、0.58和0.37倍。结论广州市白纹伊蚊对高效氯氰菊酯已产生低等抗性,在实际消杀工作中需注意合理用药,延缓蚊虫抗药性的发展。
Objective To understand the resistance of three common insecticides, dichlorvos, propoxur and beta-cypermethrin to Aedes albopictus in Guangzhou, Foshan and Chaozhou in Guangdong Province. Methods The larvae were used to monitor the resistance of Ae. Albopictus larvae in Guangzhou, Foshan and Chaozhou. Results The LC50 of Aedes albopictus to dichlorvos, propoxur and beta-cypermethrin in Guangzhou were 0.226, 3.894 and 0.407 mg / L, respectively, and the multiple of resistance was 1.19, 1.62 and 2.88 times, respectively. The LC_ (50) values of beta-cypermethrin and cypermethrin were 0.170, 3.153 and 0.112 mg / L, respectively, and the resistance multiples were 0.89, 1.31 and 0.79 times, respectively. LC 50 of dichlorvos, propoxur and beta-cypermethrin in Ae. ) Were 0.152, 1.400 and 0.053 mg / L, respectively. The resistance multiples were 0.80, 0.58 and 0.37 times. Conclusion Guangzhou Aedes albopictus has low resistance to beta-cypermethrin. In the actual disinfection, it is necessary to pay attention to the rational use of drugs and delay the development of mosquito resistance.