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有关试验表明,鱼种出塘前一段时间患病鱼种的死亡率较高,严重时可达50％。这是因为,鱼种经过一冬天的营养消耗,体质已变得虚弱,加之池塘水质环境的恶化,一旦患病,很难控制。那么怎样进行防治呢? 1.鱼波豆虫病:病鱼鳃部粘液增多,局部发白或充血,部分鳞片呈灰色,有时局部或全部出现竖鳞现象。病鱼因呼吸困难,常在池边慢游,严重时漂浮在水面。防治方法:①全池泼洒1.2～1.4ppm浓度的硫酸铜;②全池泼洒0.3～
The tests showed that the mortality rate of diseased species during the period prior to pond emergence was high, up to 50% in severe cases. This is because, after a winter’s nutrition consumption of fish species, physical fitness has become weak, combined with the deterioration of the pond water environment, once the illness is difficult to control. So how to prevent it? 1. Fish-wave bean worms disease: Gill mucus increased disease, local white or congestion, some scales gray, and sometimes appear in part or all vertical scales phenomenon. Diseased fish due to breathing difficulties, often swimming slowly in the pool, floating in the water in severe cases. Prevention and treatment methods: ① Quanchiposa 1.2 ~ 1.4ppm concentration of copper sulfate; ② Quanchiposa 0.3 ~