白皮病和白粉病都是鲢、鳙鱼常见的病害,草鱼也会发生,由于两病有些相似,易引起判断失误。因此,笔者对这两种病的症状与防治技术作介绍,供养鱼户参考。1.白皮病因极毛杆菌感染而引起。发病时,病鱼尾柄出现白点,不久即迅速向前蔓延扩大,严重者在水中头朝下,尾朝上,与水面近似垂 White skin disease and powdery mildew are common diseases of silver carp and bighead carp. Grass carp can also occur. Due to the similarities between the two diseases, it can easily lead to errors in judgment. Therefore, the author describes the symptoms of these two diseases and prevention and treatment techniques for the provision of fish farmers reference. 1. White skin caused by extreme bacillus infection. Occurrence, the sick fish tail handle white spots, soon spread rapidly to move forward, in serious cases in the water head down, tail-up, and the water is approximately vertical