草鱼因肉质细嫩、肌间刺少、蛋白含量高而备受消费者的青睐,市场销售量大。草鱼养殖是本市主要养殖品种。随着养殖技术水平的提高,放养密度的增大,投入品的增加,草鱼的病害亦日趋增多。特别是草鱼“三病”(烂鳃病、肠炎病、赤皮病)的发生给广大养鱼户造成了较大的经济损失,严重影响了养鱼户养草鱼的积极性。 Grass carp due to the tender meat, muscle between the thorn less, high protein content and much consumers, the market sales. Grass carp culture is the city’s main breeding species. With the improvement of farming techniques, the increase of stocking densities and the increase of input products, the disease of grass carp is also increasing day by day. In particular, the occurrence of grass carp “three diseases ” (rotten gill disease, enteritis disease and red skin disease) has caused great economic losses to the fish farmers and severely affected the enthusiasm of fish farmers.