初夏季节,水温适宜,各种病源体容易滋生繁殖,是鱼类发病季节。如果忽视预防很容易诱发鱼病。尤其是草鱼发病死亡率高,损失大。现将四种主要鱼病的症状及防治方法分别介绍如下:一、水霉病:发病症状:鱼体局部受伤,鳞片脱落,表体发霉或长毛。游动失常,食量减退,以致瘦弱而死。发病 In the early summer season, the water temperature is appropriate, a variety of pathogen body breeding breeding, is the season of fish disease. If you ignore the prevention is very easy to induce fish disease. In particular, the incidence of grass carp high mortality, loss. Now the four main symptoms of fish disease and prevention methods are described as follows: First, the water mildew disease: symptoms: local injury fish, scales off, moldy or long hairy body. Wandering disorders, food intake decreased, resulting in thin and die. Disease