用氯硝柳胺药砂袋在江滩进行缓释灭螺实验结果显示：2g／m2、4g／m2组与氯硝柳胺机喷2g／m2组，1996年施药后15d，活螺平均密度及活螺框出现率下降都在90％以上；1997年施药后90d，活螺平均密度下降90％以上，活螺框出现率下降80％以上。该法灭螺效果与降雨有关，且操作简便，省工、省力、省经费，适用于大面积高水源较远地段的江、河、湖滩的灭螺。 With niclosamide sand bags in river beach sustained-release molluscum test results showed that: 2g / m2, 4g / m2 group and niclosamide spray 2g / m2 group 15d after application of drug in 1996, the average live snail The densities and the occurrence of live snails decreased more than 90%. After 90 days of application in 1997, the average density of live snails decreased more than 90%, and the incidence of live snails dropped more than 80%. The method of eliminating snail effect and rainfall-related, and easy to operate, labor-saving, labor-saving, provincial funds, suitable for large areas of high water distant river, river, lake beach snail.