上海市杨浦区家蝇对常用杀虫剂的抗药性研究

目的 掌握上海市杨浦区家蝇对常用杀虫剂的抗药性水平和发展趋势,为更科学、合理地蝇类治理提供理论依据.方法 采用点滴法测试雌蝇的半数致死剂量,采用SPSS 25.0计算杀虫剂的毒力基线.结果 上海市杨浦区2010-2020年测定的家蝇对高效氯氰菊酯的抗性倍数依次为7.91、7.21、8.95、19.42,抗药性呈上升趋势...

Resistance of Musca domestica to commonly used insecticides in Yangpu District of Shanghai

Objective To investigate the current status and the trend of the resistance of Musca domestica to commonly used insecticides in Yangpu District of Shanghai, China, and we provide theoretical basis for the scientific and rational fly governance. Methods Topical application was used to test the median lethal dose (LD₅₀) of female M. domestica. SPSS 25.0 was used to calculate the toxicity baselines of insecticides. Results From 2010 to 2020, the resistance ratios of M. domestica to beta-cypermethrin were 7.91, 7.21, 8.95 and 19.42 respectively; the resistance appeared increase tendency, and LD₅₀ in 2020 was statistical significantly higher than LD₅₀ in 2013, 2016 and 2018 (P<0.05). The resistance ratios to deltamethrin were 118.46, 75.38 and 121.54 respectively; the resistance decreased first and then increased. The resistance ratios to permethrin were 15.23, 31.00 and 38.69 respectively; the resistance appeared increase tendency, and LD₅₀ in 2013 and 2020 were statistical significantly higher than LD₅₀ in 2010 (P<0.05). The resistance ratios to propoxur were 62.61, 36.14 and 54.86 respectively; the resistance decreased first and then increased, and LD₅₀ in 2013 was statistical significantly higher than LD₅₀ in 2018 (P<0.05). The resistance ratios to pirimiphos-methyl were 13.03, 30.16 and 11.82 respectively; the resistance increased first and then decreased, and LD₅₀ in 2013 was statistical significantly higher than LD₅₀ in 2010 and 2018 (P<0.05). There was difference between the resistance of M. domestica to five species of insecticides from 2010 to 2020, and the differences of the resistance ratios were statistically significant (F=10.528, P=0.014). Conclusion M. domestica developed different resistance level to five species of insecticides in Yangpu District of Shanghai, and it is suggested that propoxur should be used cautiously, and deltamethrin should be deprecated. It′s important to prevent the resistance in vector governance, and it′s much more important to implement the strategies of "green governance", in order to set out a way of economical, secure, sustainable vector control.