Susceptibility of Anopheles sinensis to insecticides in Puyang City, Henan Province
10.16250/j.32.1374.2020331
- VernacularTitle:河南省濮阳市中华按蚊对杀虫剂敏感性调查
- Author:
Ya-Bo HU
1
;
Zhi-Quan HE
2
;
Ying LIU
2
;
Dan QIAN
2
;
Cheng-Yun YANG
2
;
De-Ling LU
2
;
Qun-Qun ZHANG
1
;
Hong-Wei ZHANG
1
Author Information
1. School of Public Health, Zhengzhou University, Zhengzhou 450001, China
2. Henan Provincial Center for Disease Control and Prevention, China
- Publication Type:Journal Article
- Keywords:
Anopheles sinensis;
Malathion;
Deltamethrin;
Lambda-cyhalothrin;
Insecticide resistance;
Puyang City
- From:
Chinese Journal of Schistosomiasis Control
2021;33(5):501-504
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the susceptibility of Anopheles sinensis to malathion, deltamethrin and lambda-cyhalothrin in Puyang City, Henan Province, so as to provide the scientific basis for local malaria vector control. Methods An. sinensis was captured from Puyang County, Puyang City of Henan Province in September 2018 and July 2020, and the susceptibility of field captured An. sinensis to malathion, deltamethrin and lambda-cyhalothrin was tested using the filter-paper bioassay recommended by WHO. The insecticide resistance level was assessed based on the WHO criteria. Results In 2018 and 2010, the half knock-down times (KT50) of malathion were 91.08 min and 40.95 min for An. sinensis, with knock-down rates of 37.50% and 60.87% 60 min post-exposure to malathion and 24-hour mortality rates of 90.91% and 100%, respectively, and the insecticide resistance levels were moderately resistant (M) and susceptible (S). The KT50 of deltamethrin were 415.56 min and 341.19 min for An. sinensis in 2018 and 2020, with knock-down rates of 22.92% and 16.98% 60 min post-exposure to malathion and 24-hour mortality rates of 22.92% and 16.98%, and the insecticide resistance levels were all resistant (R). The KT50 of lambda-cyhalothrin were 164.22 min and 236.22 min for An. sinensis in 2018 and 2020, with knock-down rates of 30.39% and 38.30% 60 min postexposure to malathion and 24 h mortality rates of 19.60% and 21.28%, respectively, and the insecticide resistance levels were all R. Conclusion An. sinensis is relatively susceptible to malathion but has developed high-level resistance to deltamethrin and lambda-cyhalothrin in Puyang City, Henan Province..
