春夏季节,水温适宜,水中各种病原容易滋生繁殖,是鱼病多发季节。尤其是草鱼发病死亡率高,损失大,如果忽视预防很容易诱发鱼病。广大养鱼户应树立无病先防、防重于治的原则,及时做好预防工作。现将四种主要鱼病的防治方法分别介绍如下:1.水霉病易流行于早春季节。主要症状:鱼体 Spring and summer seasons, water temperature suitable for breeding of various pathogenic bacteria in the water, is a season of fish disease. In particular, the incidence of grass carp high mortality, loss, neglect of prevention is very easy to induce fish disease. The majority of fish farmers should establish a disease-free first, take the principle of prevention and cure, and timely prevention work. Now four kinds of major prevention and treatment of fish diseases are introduced as follows: 1, fungal disease is prevalent in early spring. The main symptoms: fish