Molluscicidal effect of immersion with 50% wettable powder of niclosamide ethanolamine salt against Oncomelania hupensis on the soil surface and inside the soil layer in winter
10.16250/j.32.1374.2021097
- VernacularTitle:50%杀螺胺乙醇胺盐可湿性粉剂浸杀法冬季对土表 及土层下钉螺杀灭效果
- Author:
Wei-chun WANG
1
;
Ti ZHAN
1
;
Ze-han FAN
1
;
Ke-xia XIANG
1
;
Ying-fu ZHU
1
;
Yong-mei DUAN
1
;
Zhi-guo CAO
2
Author Information
1. Maanshan Municipal Center of Disease Control and Prevention, Maanshan, Anhui 243000, China
2. Anhui Provincial Institute of Schistosomiasis Control, Hefei, Anhui 230021, China
- Publication Type:Journal Article
- Keywords:
Oncomelania snail;
Niclosamide ethanolamine salt;
Molluscicidal effect
- From:
Chinese Journal of Schistosomiasis Control
2022;34(4):396-399
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the molluscicidal effect of 50% wettable powder of niclosamide ethanolamine salt (WPNES) against Oncomelania hupensis on the soil surface and inside the soil layer by immersion method in winter. Methods O. hupensis snails were placed on the soil surface and 2, 5 cm and 10 cm under the soil layer outdoors in winter, and then immersed in 50% WPNES at concentrations of 1 mg/L and 2 mg/L for 1, 3 d and 7 d, while dechlorinated water served as controls. Snail mortality was observed following immersion with 50% WPNES on the soil surface and inside the soil layer. Results Following immersion with 50% WPNES at concentrations of 2 mg/L and 1 mg/L outdoors in winter, the 3-day corrected snail mortality rates were 98.0% and 76.0% on the soil surface, and the 7-day corrected snail mortality rate was both 100.0%. Following immersion with 50% WPNES at concentrations of 2 mg/L and 1 mg/L outdoors in winter, the 7-day corrected snail mortality rates were 95.5% and 85.6% 2 cm below the soil layer, 66.0% and 6.4% 5 cm below the soil layer. However, the 7-day snail mortality rate swere comparable between the 50% WPNES treatment group (at 2 mg/L and 1 mg/L) and controls 10 cm below the soil layer (both P > 0.05). Conclusion Immersion of 50% WPNES at a concentration of 2 mg/L for 7 days presents a high molluscicidal efficacy against O. hupensis on the soil surface and 5 cm within the soil layers in winter.
