Resistance of Musca domestica to beta-cypermethrin,deltamethrin,and propoxur in Shizuishan,Ningxia Hui Autonomous Region,China in 2020 and 2023
Objective To investigate the resistance of Musca domestica to three commonly used insecticides and the changes in Shizuishan,Ningxia Hui Autonomous Region,China,and analyze the reasons,so as to provide a basis for the development of scientific,rational,and effective fly control measures.Methods The topical application method was used to determine the resistance levels of M.domestica to insecticides in 2020 and 2023.The median lethal dose(LD50),regression equation,and resistance ratio were calculated with the use of DPS 18.10 software,and were compared with the resistance data of 2016.The information on the usage of insecticides(retail and centralized procurement)in Shizuishan in 2019,2021,and 2022 was obtained through on-the-spot inspection and enquiry,and descriptive analysis was performed on the data.Results The resistance ratios of M.demestica to beta-cypermethrin,deltamethrin,and propoxur in Shizuishan were 24.70,144.72,and 2.66 in 2020,respectively,and the resistance ratios were 37.65,25.89,and 6.07 in 2023,respectively.In 2016,2020 and 2023,M.domestica was lowly resistant to propoxur and highly resistant to beta-cypermethrin and deltamethrin;and the resistance ratio for beta-cypermethrin showed an increasing trend,while the resistance ratios for deltamethrin and propoxur showed decreasing trends.From 2019 to 2022,a total of 16 kinds of insecticides were used in Shizuishan,and pyrethroids were most common,which accounted for 66.66%,41.67%,and 42.86%of all the insecticide types used in 2019,2021,and 2022,respectively;and the annual consumption of pyrethroids was highest,accounting for 82.31%,36.36%,and 59.08%of the total consumption in the three years,respectively.Conclusions M.domestica in Shizuishan has developed different levels of resistance to beta-cypermethrin,deltamethrin,and propoxur,which is consistent with local use of the three insecticides.The three insecticides should be used in a rotational way with other insecticides without cross-resistance,so as to delay the development of the resistance of M.domestica.
Musca domesticaInsecticideInsecticide resistanceNingxia Hui Autonomous Region
NETL
NSTL
万方数据
