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目的了解甘肃省铁路辖区德国小蠊对乙酰甲胺磷、残杀威、三氟氯氰菊酯、高效氯氰菊酯、氟虫腈5种杀虫剂的敏感性和致死效果。方法采用WHO推荐的果酱瓶药膜接触法。结果兰州、嘉峪关铁路辖区野生种群对高效氯氰菊酯抗性系数分别为2.17、12.34倍,对三氟氯氰菊酯抗性系数分别为2.87、4.96倍。三氟氯氰菊酯对兰州铁路地区野生种群致死效果下降率达90.00%,其次是残杀威(53.33%);残杀威、三氟氯氰菊酯对嘉峪关铁路地区野生种群致死效果下降率均为40.00%。结论在对德国小蠊防治工作中应减少对高效氯氰菊酯、三氟氯氰菊酯的使用量,慎用残杀威,优先考虑使用乙酰甲胺磷、氟虫腈,有计划地交替、轮换使用杀虫剂。
Objective To understand the sensitivity and lethal effects of 5 species of insecticides such as acephate, propoxur, cyhalothrin, beta-cypermethrin and fipronil on German cockroach in Gansu provincial railway. Methods The recommended jam jar drug film contact method. Results The resistance coefficients of beta-cypermethrin to wild population in Lanzhou and Jiayuguan railways were 2.17 and 12.34 times respectively, and the resistance coefficients to cyhalothrin were 2.87 and 4.96 times respectively. The rate of lethal effect of cyhalothrin to wild population in Lanzhou Railway area was 90.00%, followed by that of Granictox (53.33%). The lethal effect of Propoxur and cyhalothrin on wild population in Jiayuguan Railway was 40.00%. Conclusion The use of cypermethrin and cyhalothrin should be reduced during the prevention and control of Blattella germanica. Prophylaxis should be used with caution. Acephate and fipronil should be used preferentially, and pesticides should be switched alternately and alternately.