茶粕浸泡析出物防治桑园灰蜗牛的田间效果试验

利用茶粕浸泡液（主要有效成分为茶皂素）对桑园灰蜗牛进行防治，比较不同茶粕浸泡液浓度的防治效果。结果表明：以茶粕浸泡原液的300倍稀释浓度防治桑园灰蜗牛效果最好，施药7d后平均防效达82．81％，且对桑树生长无不良影响。证明利用茶粕浸泡析出物进行防治桑园灰蜗牛是可行的，可利用茶粕浸泡原液的300—500倍稀释液进行常规喷雾防治桑园灰蜗牛。

Field control efficacy of immersion precipitation of tea deed meal on mulberry grey snail

The immersion precipitation（Main composition：tea saponin）of tea seed meal was applying to control mulberry grey snail, the control efficacy of different concentration of immersion precipitation on mulberry grey snail were compared in this experiment. The results showed that the 300 times dilution of immersion precipitation of tea seed meal had the best control efficacy on mulberry grey snail, its average control efficien- cy was 82.81% in seven days after application, and had not any adverse effect on growth of mulberry trees. So it is feasible for applying the immersion precipitation of tea seed meal to control the mulberry grey snail, and the 300 to 500 times dilution of immersion precipitation of tea seed meal are suitable concentration for control the mulberry grey snail in production.