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一、细菌性鱼病。主要有鲢鳙鱼的打印病和草青鱼的赤皮病。这两种病是由于机械损伤、被细菌侵入造成。防治方法是:鱼种下塘前用5%食盐水浸泡3～5分钟,下塘后定期用1PPM 漂白粉(或0.5ppm 优氯净,0.2ppm 强氯精)或20PPM 生石灰全塘泼洒。二、真菌性鱼病。主要是水霉病。该病是由于机械损伤、冻伤或过度密养造成。各种鱼类在冬季都易发生此病,并能引起死亡。预防此病可用20ppm 高锰酸
First, bacterial fish disease. Mainly silver carp bighead carp print disease and grass carp red-skin disease. Both diseases are due to mechanical damage caused by bacteria invade. Preventive measures are: before the fish ponds with 5% salt water soak 3 to 5 minutes, after the pond regularly with 1PPM bleach (or 0.5ppm excellent chlorine net, 0.2ppm strong chlorine) or 20PPM quicklime whole pond spill. Second, fungal fish disease. Mainly water mold disease. The disease is due to mechanical injury, frostbite or over-keeping caused. All kinds of fish are prone to the disease in winter and can cause death. 20ppm permanganate can be used to prevent the disease