春夏季节,水温适宜,水中各种病源体容易滋生繁殖,是鱼类的发病季节。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:易流行于早春季节。症状:鱼体表面局部鳞片脱落,表体发霉或长毛。 Spring and summer seasons, water temperature suitable, easy to breed a variety of water sources in the body, is the season of fish incidence. If you ignore the prevention is very easy to cause fish disease, especially the incidence of grass carp high mortality, loss. Now the symptoms of four major fish diseases and prevention methods are described as follows: First, the water mold disease: easy to prevalent in the early spring season. Symptoms: local scale surface shedding fish, moldy or long hairy body.