洞庭湖区现有境内钉螺面积710．64万m2。虽年年采用药物灭螺，但由于环境复杂，效果难以巩固。为了探索结合生产改造环境消灭烷内钉螺的新方法，我们于1993—1997年在洞庭湖区进行了烷内有螺低洼地带挖精养鱼池消灭钉螺的效果和效益观察。1方法1．1现场在东、南、西洞庭湖各选 Dongting Lake area snail snail existing area 7106,400 m2. Although the annual snail drugs, but due to the complex environment, the effect is difficult to consolidate. In order to explore a new method to eliminate the snail in Antarctica by combining with the production and remodeling environment, we conducted an observation on the effect and benefit of snail elimination by digging and fine-breeding the fish pond in the alkane in the Dongting Lake area from 1993 to 1997. 1 Method 1.1 The scene in the East, South, West Dongting Lake each election