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目的了解江苏省淡色库蚊成蚊对常用杀虫剂的抗药性现状,以有效指导淡色库蚊的防治。方法采用成蚊接触筒法测定LC50。结果江苏省南京、徐州、连云港、无锡、南通和淮安市淡色库蚊现场种群成蚊对溴氰菊酯的LC50分别为0.0173%、0.0756%、0.0487%、0.0070%、0.0055%和0.0150%,对氯菊酯的LC50分别为0.2128%、0.2711%、0.1130%、0.1579%、0.0504%和0.0734%,南京、徐州、连云港、无锡、南通、淮安和苏州市淡色库蚊现场种群成蚊对高效氯氰菊酯的LC50分别为0.0224%、0.0420%、0.0843%、0.0023%、0.0114%、0.0180%和0.0108%,南京和南通种群成蚊对敌敌畏的LC50分别为0.0119%和0.0046%,对残杀威的LC50分别为0.0129%和0.0077%。所测种群对溴氰菊酯均产生了中等及其以上程度的抗性,其中徐州和连云港种群抗性倍数均在100倍以上;对高效氯氰菊酯呈低抗至高抗,其中连云港种群的抗性高达94.7倍,无锡种群的抗性仅为2.6倍;对氯菊酯呈低抗至中抗,其中南京和徐州种群的抗性倍数为11～15倍,南通种群抗性倍数为2.8倍;南京种群对残杀威低抗(2.8倍),南京种群对敌敌畏、南通种群对敌敌畏和残杀威均敏感。结论江苏省在成蚊防治中,应减少溴氰菊酯和高效氯氰菊酯的使用,可增加敌敌畏等有机磷类和残杀威等氨基甲酸酯类杀虫剂的使用;在进行成蚊化学防治时,要从全局考虑,做好杀虫剂使用的整体规划,以延缓或减少害虫抗药性的发生发展。
Objective To understand the status quo of resistance of adult Culex pipiens pallens to common insecticides in Jiangsu Province so as to effectively guide the prevention and control of Culex pipiens pallens. Methods Adult adult mosquitoes were used to determine LC50. Results The LC50 of adult mosquitoes to deltamethrin in field populations of Culex pipiens pallens in Nanjing, Xuzhou, Lianyungang, Wuxi, Nantong and Huaian were respectively 0.0173%, 0.0756%, 0.0487%, 0.0070%, 0.0055% and 0.0150% The LC50 of permethrin were 0.2128%, 0.2711%, 0.1130%, 0.1579%, 0.0504% and 0.0734%, respectively. The population of adult Culex pipiens pallens in Nanjing, Xuzhou, Lianyungang, Wuxi, Nantong, LC50 were 0.0224%, 0.0420%, 0.0843%, 0.0023%, 0.0114%, 0.0180% and 0.0108%, respectively. The LC50 values of adult mosquitoes in Nanjing and Nantong to dichlorvos were 0.0119% and 0.0046%, respectively. The LC50 values for propoxur were 0.0129 % And 0.0077%. All the tested populations had moderate and above resistance to deltamethrin, among them, the resistance multiple of population in Xuzhou and Lianyungang was over 100 times; the resistance to beta-cypermethrin was low to high, and the resistance in Lianyungang population was as high as 94.7-fold, Wuxi population was only 2.6 times resistance; Permethrin was low resistance to moderate resistance, which Nanjing and Xuzhou population resistance was 11 to 15 times, Nantong population resistance multiple was 2.8 times; Nanjing population Resistant to malaria low resistance (2.8 times), Nanjing population of dichlorvos, Nantong population were susceptible to dichlorvos and malaria. Conclusion In Jiangsu Province, the use of deltamethrin and beta-cypermethrin should be reduced and the use of organophosphates such as dichlorvos and carbamates such as propoxurin should be increased. In the chemical control of adult mosquitoes, From the overall considerations, do a good job in the overall planning of pesticide use, in order to delay or reduce the occurrence of pest resistance.