Abstract: Objective To compare the molluscicidal effects and cost?effectiveness of 5% niclosamide ethanolamine salt granules （NEG） and 26% suspension concentrate of metalaldehyde and niclosamide ethanolamine salt （MNSC）. Methods Two plots with high Oncomelania hupensis snail density were selected as research areas in Nanjing Chemical Industry Zone， and 5% NEG （40 g/m2） and 26% MNSC （40 g/m2） were used by the spraying method for snail control in the two plots， and their molluscicidal effects and cost?effectiveness were investigated and statistically analyzed. Results There was no significant difference between 5% NEG and 26% MNSC in the molluscicidal effects. The cost of 5% NEG was 1.25 times higher than that of 26% MNSC per ten thousand square meters in snail control. Conclusions The cost of 5% NEG is higher than that of 26% MNSC per ten thousand square meters in snail control. Their molluscicidal effects are similar.

Key words: Oncomelania hupensis, 5% niclosamide ethanolamine salt granules, 26% suspension concentrate of metalaldehyde and niclosamide ethanolamine salt, Molluscicidal effect, Molluscicidal cost

摘要： 目的 比较5%杀螺胺乙醇胺盐颗粒剂（NEG）和26%四聚杀螺胺悬浮剂（MNSC）灭螺成本和效果。方法 在江苏省南京市化学工业园区选择2个钉螺密度较高的滩块，分别用5% NEG 40 g/m2喷撒和26% MNSC 4 g/m2喷洒灭螺，比较其灭螺成本和灭螺效果。结果 5% NEG 1 hm2灭螺费用是26% MNSC的1.25倍，5% NEG灭螺效果和26% MNSC无显著差异。结论 5% NEG总灭螺费用高于26% MNSC，而灭螺效果相当。

关键词: 钉螺, 5%杀螺胺乙醇胺盐颗粒剂, 26%四聚杀螺胺悬浮剂, 灭螺效果, 灭螺成本