草鱼种培育及成鱼养殖过程中,赤皮、肠炎、烂鳃病被人们公认为是难治难防的草鱼“老三病”,不但影响下塘鱼种的成活率和成鱼的出塘产量,也从经济效益和生产管理上造成许多麻烦,甚至有些养鱼户在万般无奈的情况下,使用违禁药物治疗,很不符合无公害绿色养殖的要求。 Grass carp breeding and adult fish breeding process, red skin, enteritis, rotten gill disease is recognized as difficult to prevent grass carp “third disease”, not only affects the survival rate of the next pond species and adult fish out of the pond Production, but also from the economic and production management caused a lot of trouble, and even some fish farmers in desperation, the use of prohibited drugs, it is not consistent with the requirements of pollution-free green culture.