关键词: 家蝇, 抗药性, 趋势分析

Abstract: Objective Survey the resistance trend of Musca domestica to permethrin, deltamethrin, beta-cypermethrin and DDVP in cities of Kaifeng and Anyang, to provide scientific guidance for chemical control of flies. Methods The adult houseflies were collected in the garbage dumps, landfill and traditional markets of Kaifeng and Anyang from June to August in 2012, 2014 and 2016. The 3 to 5-day-old females from the F₁ generation were used in bioassay. GB recommended sensitive baseline topical application method was used to determine the resistance levels. Results The median lethal dose (LD₅₀) of the Kaifeng population against permethrin, deltamethrin, beta-cypermethrin and DDVP in 2012, 2014, 2016 were 0.218 1-2.235 4 μg/♀, the resistance ratios were 62.73-695.00 fold. The LD₅₀ of the Anyang population against above- mentioned insecticides in 2012, 2014, 2016 were 0.219 4-1.793 8 μg/♀, and the resistance ratios were 43.88-765.33 fold. Low resistance to DDVP was observed in both cities in 2012 and 2014, while high resistance to this pesticide was observed in Kaifeng population in 2016, and high susceptibility was shown in Anyang population in the same year. Resistance trends of Kaifeng and Anyang population were diverse against different insecticides. Conclusion Musca domestica in Kaifeng and Anyang showed different levels of resistance to four commonly used insecticides. The strategy of fly control in Kaifeng and Anyang should focus on source reduction. Chemical control should be limited and implemented with scientific merit.

Key words: Musca domestica, Resistance, Trend analysis