我县草鱼的养殖历史已很悠久,由于草鱼养殖仍然保持传统的牧草及各种无毒青草饲养的习惯,因此,其肉质好、长势快、生长周期短,深受群众的喜爱,经济效益高。但是它的抗病能力差,特别是一、二龄鱼容易发生肠炎、烂鳃、赤皮、出血“四病”,给养殖者带来不少损失。本人在从事水产养 Grass carp culture in our county has a long history of farming, grass carp culture still maintain the traditional forage and a variety of non-toxic grass feeding habits, therefore, its good flesh, fast growth, short growth cycle, loved by the masses, high economic efficiency . However, its disease resistance is poor, especially the first and second instar fish prone to enteritis, rotten gill, red skin, bleeding, “four”, bring a lot of losses to farmers. I am engaged in aquaculture