Abstract：Objective To observe the field molluscicidal effect of 50% suspension of niclosamile ethanolamine salt (50%S-NES) by spraying method in the marshland of lake regions. Methods Two experimental groups, one control group and one blank group were respectively set up in the reed areas of Huangjiatai marshland located at Anfeng Town in Anxiang County, Hunan Province. 50%S-NES was sprayed at the doses of 2 g/m2 and 1 g/m2 separately in the two experimental groups. 50% wettable powder of niclosamide ethanolamine salt (50%WP-NES) was sprayed at the dose of 2 g/m2 in the control group. The blank group did not adopt any molluscicidial countermeasures, and the nature mortality rate of Oncomelania snails was observed. Results Three, seven and fifteen days after spraying molluscicides, the corrected mortality rates of Oncomelania snails in the two experimental groups were both higher than that in the control group, showing statistically significant differences (χ2=19.35, χ2=25.59, χ2=27.77, all P<0.01). Fifteen days after spraying molluscicides, the density of living snails in the two experimental groups of 2g/m2 and 1g/m2 50%S-NES and in the control group decreased by 93.60%, 86.86% and 82.99% respectively. The decline rate of density of living snails in the experimental group of 2 g/m2 50%S-NES was 10.61% more than that in the control group. The cost of spraying molluscicides, estimated by the costs of per 1% snail mortality rate and 1% decrease in the average density of living snails per 100 m2,was the lowest in the experimental group of 2 g/m2 50%S-NES. Conclusions The molluscicidal effect of 50%S-NES is superior to that of 50%WP-NES. 50%S-NES is a new type of molluscicide with high efficacy, high solubility and low cost, and it is worthy of being used widely.
李秋平, 李之阳, 杨其荣, 廖远志, 贾铁武, 周杰, 王慧岚, 李胜明. 50%杀螺胺乙醇胺盐悬浮剂喷洒法杀灭钉螺效果观察[J]. 实用预防医学, 2018, 25(9): 1043-1045.
LI Qiu-ping, LI Zhi-yang, YANG Qi-rong, LIAO Yuan-zhi, JIA Tie-wu, ZHOU Jie, WANG Hui-lan, LI Sheng-ming. Molluscicidal effect of 50% suspension of niclosamile ethanolamine salt by spraying method. , 2018, 25(9): 1043-1045.
2018, Vol. 25 
