Resistance of adult Culex pipiens quinquefasciatus to four common insecticides in Guiyang City
10.3760/cma.j.issn.2095-4255.2019.06.010
- VernacularTitle:贵阳市致倦库蚊成蚊对4种常用杀虫剂抗药性调查
- Author:
Qiuguo LIANG
1
;
Zhengyan WANG
;
Xi YANG
;
Jinzhi CHENG
;
Jiahang WU
Author Information
1. 贵州医科大学基础医学院寄生虫学教研室贵州医科大学现代病原生物学特色重点实验室
- Keywords:
Culex;
Insecticide resistance;
Dichlorvos;
Pyrethrins
- From:
Chinese Journal of Endemiology
2019;38(6):476-480
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the insecticide resistance levels of adult Culex pipiens quinquefasciatus to four common insecticides in Guiyang City.Methods Larvae of Culex pipiens quinquefasciatus were collected from 8 areas of Guiyang City by larval scoop method from August to September 2015,and raised in the laboratory to adult Culex pipiens quinquefasciatus.Contact tube method was used to determine the insecticide resistance levels of adult Culex pipiens quinquefasciatus to four common insecticides,and knockdown rate of 1 h and mortality rate of 24 h recovery were calculated.The resistance level was judged according to the mortality rate:＜ 90％ was in the resistant group (R);90％-＜ 98％ was in the potential resistant group (M);and ≥98％ was in the sensitive group (S).Results The adult Culex pipiens quinquefasciatus were exposed to 7.70 g/L dichlorvos,3.30 g/L propoxur,0.25 g/L beta-cypermethrin and 0.20 g/L dehamethrin,knockdown rates of 1 h were 57.78％ (52/90)-91.11％ (82/90),86.67％ (78/90)-100.00％ (90/90),23.33％ (21/90)-77.78％ (70/90) and 27.78％ (25/90)-88.89％ (80/90),respectively;and mortality rates of 24 h recovery were 61.11％ (55/90)-94.44％ (85/90),90.00％ (81/90)-97.78％ (88/90),23.33％ (21/90)-73.33％ (66/90) and 21.11％ (19/90)-72.22％ (65/90),respectively.Conclusion Adult Culex pipiens quinquefasciatus in Guiyang City have developed some resistance to four common insecticides,in which the mosquito has a higher resistance to pyrethroid insecticides such as beta-cypermethrin and deltamethrin.
