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目的了解赣江流域洲滩钉螺的来源及其防治效果。方法在春季汛期洪水淹没鄱阳湖草洲时,对船、渔具携带钉螺情况进行调查,通过对有螺草洲用氯硝柳胺灭螺,观察其防治效果。结果鱼具“虾笼”中钉螺的检出率为90.86%,每笼检获最多7只,平均1.64只;“迷魂阵”中钉螺的检出率为75.00%,平均每张1.21只。经过清洗后的渔船内检获钉螺平均为每船13.69只,仅在1条船的船体外发现钉螺1只。居民的粪检阳性率为5.74%,耕牛粪检阳性率为4.00%。草洲和堤脚植被主要有灰化苔草、芒尖苔草、狗牙根等。结论“虾笼”和“迷魂阵”等渔具在赣江北支洲滩的清理和晾、晒是造成赣江钉螺扩散的主要原因。要加强对其草洲的查、灭螺和渔具等的监测工作。
Objective To understand the origin and the control effect of snails on the bank of Ganjiang River basin. Methods During the flooding of Poyang Lake grassland in the flood season in spring, the situation of carrying oncomelania in ships and fishing gear was investigated. The control effect of snail on snail was evaluated by snail control. Results The detection rate of snails in the “shrimp cage” was 90.86%, and the average number of the snails in each cage was 7, with an average of 1.64. The detection rate of Oncomelania was 75.00% with an average of 1.21. After the cleaning of the fishing vessels seized snail average of 13.69 per boat, found only in a ship’s hull snail 1 only. Residents of the fecal positive rate was 5.74%, cow dung seized positive rate of 4.00%. Grassland and embankment vegetation mainly asphyxial Carex, Carex Carey, bermudagrass and so on. Conclusion The cleaning, drying and drying of the fishing gear such as “shrimp cage” and “ecstasy array” in the northern branch of Ganjiang River are the main reasons for the spread of the snail in Ganjiang River. It is necessary to step up monitoring of its checker, snail and fishing tackle.