药物灭螺是消灭血吸虫中间宿主——钉螺蛳的有效措施之一。我们于1956年5月间曾应用了茶子饼作灭螺实验,并测定其效果,认为确有一定作用。如能结合茶子饼施肥,既可以解决一部分肥料间题,同时又有利于预防血吸虫病和杀灭农业害虫。一、灭螺实验(一)室内实验(1)浸泡法:将茶子饼粉末分别称取O.1,0.2,O.5及1克各溶于100毫升冷水中,使成为0.1%,0.2%,0.5%及1%的溶液;或再稀释成0.01%,0.02%,o.05%的溶液。浸泡12小时后即可将钉螺浸泡其中,进行观察,记录其死亡情况。(2)粉撒法:选择屋旁泥地,划定1平方公尺的泥 Snail killing is one of the effective measures to eliminate schistosome intermediate snail. In May 1956, we used the tea cake as a snail test and determined its effect, which we think does play a role. If combined with tea cake fertilizers, can solve part of the problem of fertilizer, but also conducive to the prevention of schistosomiasis and kill agricultural pests. First, the snail test (a) laboratory experiments (1) immersion method: the tea cake powder were weighed O. 1, 0.2, O. 5 and 1 g each dissolved in 100 ml of cold water to make 0.1%, 0.2 %, 0.5% and 1% solutions; or redissolved into 0.01%, 0.02%, 0.05% solutions. Soak soaked snails for 12 hours, observe and record the death. (2) Sprinkle method: Select the mud around the house, delineation of 1 square meter of mud