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波阳县双港乡沿湖易感草洲面积为36692亩,1975～1980年农药物灭螺1000～2000亩,由于草洲面积大,灭螺面积相对数值小,故不能有效地降低草洲阳性钉螺密度。如某坪面积为19246亩,1976和1977年各灭螺1000亩,其阳性钉螺密度仅由0.005只/尺~2降至0.0043只/尺~2,且湖区居民急性感染也无明显变化。该乡在鄱阳湖岛屿四周有易感草洲4251亩,1981～1983年每年药物灭螺2000亩,阳性钉螺密度由0.064只/尺~2降至0.0008只/尺~2,岛上居民急性感
The area of Shuanggang Township in Boyang County is 36,692 mu with susceptible area of Souchu Island and 1,000-2,000 mu of farmland snails with pesticides from 1975 to 1980. Due to the large area of grassland and the relatively small area of snail, it is not effective in reducing grassland Positive snail density. For example, a certain area of 19,246 mu and 1976 and 1977, respectively, 1,000 mu of snail snail, the positive snail density from 0.005 only / feet ~ 2 to 0.0043 / feet ~ 2, and Lake residents did not change significantly acute infection. The township of Poyang Lake around the island susceptible to the turf 4251 acres of 1981 to 1983 annual drug molluscs 2000 acres, the positive snail density from 0.064 / sq ft ~ 2 to 0.0008 / ft ~ 2, the island residents acute sense