机械和人工土埋灭螺的效果-成本分析

目的 目的 探索特殊有螺环境 （特殊环境） 的高效灭螺方法。方法 方法 2006年对乱石溪滩、 渗水荒山等大面积特殊环 境， 采用挖掘机进行一次性深挖深埋灭螺 （机埋灭螺）， 灭螺后， 连续7年观察灭螺效果， 并与2005年采用春、 秋两季人工铲 草土埋2次、 药杀8次的灭螺方法 （人工灭螺） 的效果和成本进行比较。结果 结果 2006年采用机埋灭螺法， 投入为0.78元/ m2 ， 有螺面积压缩率达100%； 2005年采用人工灭螺法， 投入为1.34元/m2 ， 有螺面积压缩率为20.26%。机埋灭螺比人工灭螺投 入降低41.79%， 灭螺效果提高79.74%。结论 结论 大面积特殊环境采用机埋灭螺优于人工灭螺。

Cost-effectiveness analysis of mechanical and manual soil-buried methods for Oncomelania hupensis control

Objective To explore a high molluscicidal efficient method in special Oncomelania hupensis snail environments. Methods In 2005 and 2006,in large special environments（rubble creek beaches and seepage barren hills with snails）,the me-chanical soil-buried method（excavator digging to bury deep snails）and manual soil-buried method were used respectively,and the results were compared for the cost-effectiveness. Results With the mechanical soil-buried method in 2006,the investment was 0.78 yuan/m2,and the compression rate of snail areas was 100%;with the manual soil-buried method in 2005,the investment was 1.34 yuan/m2,and the compression rate of snail areas was 20.26%. The former was much better than the latter. Conclusion In the large special environments with snails,the mechanical soil-buried method is superior to manual soil-buried method.