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目的了解成都市白纹伊蚊对常用杀虫剂的抗性现状,提出预防蚊虫产生抗药性的科学对策。方法在成都市城区5个区域(分别位于东、南、西、北、中位置)及郊县金堂县采集白纹伊蚊幼虫,在实验室繁殖1~2代后,采用WHO生物测试法进行抗性测定。结果成都市主城区及金堂县白纹伊蚊对敌敌畏抗性倍数分别为1.77和2.16,主城区呈敏感性,而金堂县已产生低抗性;对高效氯氰菊酯、溴氰菊酯和双硫磷抗性倍数分别为8.05、8.26、3.36和8.90、6.67、6.18,均已产生低抗性;对氯菊酯的抗性倍数分别为16.24和10.69,均已产生中等抗性。结论应继续加强对白纹伊蚊的抗药性监测,科学合理使用杀虫剂,预防或延缓抗药性的产生。
Objective To understand the status quo of resistance of common Aedes albopictus to common insecticides in Chengdu and propose a scientific countermeasure to prevent mosquito resistance. Methods Aedes albopictus larvae were collected from 5 districts (east, south, west, north and middle) of Chengdu City and Jintang County of the suburbs respectively. After breeding for 1-2 generations in the laboratory, the WHO bioassay method was used Resistance assay. Results The resistance rates to dichlorvos of Aedes albopictus in the main urban area of Chengdu City and Jintang County were 1.77 and 2.16, respectively. The main urban area was sensitive and Jintang County was already low resistant. For cypermethrin, deltamethrin and diphtheria Resistant multiples were 8.05,8.26,3.36 and 8.90,6.67,6.18, have been produced low resistance; resistance to permethrin were 16.24 and 10.69, have produced moderate resistance. Conclusion We should continue to strengthen the monitoring of resistance to Aedes albopictus, use pesticides scientifically and reasonably, and prevent or delay the emergence of drug resistance.