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目的了解泰安城区重要病媒种类淡色库蚊及德国小蠊对常用杀虫剂的抗药性状况,为科学合理使用杀虫剂提供依据。方法淡色库蚊采用浸渍法,德国小蠊采用药膜接触法。结果淡色库蚊对高效氯氰菊酯、溴氰菊酯和氯菊酯的抗性系数分别是敏感品系的1.42、5.00和2.38倍。实验室德国小蠊敏感品系(S)对高效氯氰菊酯、乙酰甲胺磷、溴氰菊酯和残杀威的KT50分别为3.95、7.33、5.02和10.99 min。而现场品系(R)对上述杀虫剂的抗性系数分别是敏感品系的1.54、8.71、1.40和0.84倍。结论泰安城区淡色库蚊对常用杀虫剂敏感的是高效氯氰菊酯和氯菊酯,产生抗药性的是溴氰菊酯。德国小蠊现场品系(R)对乙酰甲胺磷已产生抗性,对高效氯氰菊酯、溴氰菊酯和残杀威敏感。建议采取环境治理为主,化学防治使用菊酯类杀虫剂提高灭杀效果,并继续加强抗药性监测,根据抗性变化科学合理地停用/选用杀虫剂,把淡色库蚊及德国小蠊密度控制在在较低水平。
Objective To understand the resistance status of Culex pipiens pallens and German cockroach, which are important vectors in Tai’an city, to commonly used insecticides, and provide the basis for the scientific and rational use of insecticides. Methods The Culex pipiens pallens were immersed by immersion method and the German cockroach was treated by the membrane contact method. Results The resistance coefficients of Culex pipiens pallens to beta-cypermethrin, deltamethrin and permethrin were 1.42, 5.00 and 2.38 times that of susceptible strain respectively. The KT50 of the sensitive strains of German cockroach (S) to beta-cypermethrin, acephate, deltamethrin and propoxur were 3.95, 7.33, 5.02 and 10.99 min, respectively. On the other hand, the resistance coefficients of on-site lines (R) to the above insecticides were 1.54, 8.71, 1.40 and 0.84 times that of the sensitive lines, respectively. Conclusion The Culex pipiens pallens in Tai’an urban area are sensitive to commonly used insecticides and they are beta-cypermethrin and permethrin. Blattella germanica field strain (R) is resistant to acephate and is sensitive to beta-cypermethrin, deltamethrin and propoxur. It is recommended that environmental management should be the main method of chemical prevention and control of pyrethroid insecticides to enhance the killing effect. Drug resistance monitoring should continue to be strengthened. Insecticides should be discontinued / selected scientifically and rationally according to resistance changes. Cockroach density is controlled at lower levels.