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目的了解江门市登革热媒介白纹伊蚊对常用杀虫剂的抗性现状,为合理使用有效的杀虫剂控制白纹伊蚊提供科学依据,控制登革热在江门地区的暴发流行。方法在江门市5个社区采集白纹伊蚊幼虫,在实验室繁殖1~3代,采用WHO推荐的幼虫浸渍法进行检测。结果各监测点白纹伊蚊对双硫磷抗性倍数均<3,属敏感;残杀威除礼乐社区抗性倍数为4.53倍,属低度抗性外,其他属敏感;对高效氯氰菊酯、溴氰菊酯、氯菊酯均产生了不同程度的抗性;5种杀虫剂的抗性有统计学差异(χ2=18.47,P<0.05),5个社区对杀虫剂的抗药性无统计学差异(χ2=1.18,P>0.05)。结论今后应加强监测,采取综合治理措施,正确选择和合理使用杀虫剂,延缓抗药性的产生。
Objective To understand the resistance status of dengue vector Aedes albopictus to commonly used insecticides in Jiangmen and to provide a scientific basis for rational use of effective insecticides to control Aedes albopictus and control the outbreak of dengue fever in Jiangmen area. Methods Aedes albopictus larvae were collected from 5 communities in Jiangmen City and were propagated in the laboratory for 1-3 generations. The larvae immersion method recommended by the WHO was used for detection. Results Aedes albopictus resistant to diphtheria in all monitoring sites was <3, which belonged to sensitive genus. However, except for the community with low resistance, Deltamethrin and permethrin all had different degrees of resistance. The resistances of the five insecticides were statistically different (χ2 = 18.47, P <0.05). The resistance of five communities to insecticides was no Statistical difference (χ2 = 1.18, P> 0.05). Conclusion In the future, we should strengthen monitoring and take comprehensive control measures to correctly select and use pesticides reasonably and delay the emergence of drug resistance.