传统的网箱养鱼外用药一般是采取提起网箱三只角,使鱼到一个网角后加大剂量用药,这种用药方法有以下几点缺陷:一是只能杀死鱼类体表病原体,而对水体不起作用;二是大剂量用药可侵蚀鱼类鳃丝和鱼体表粘膜,降低鱼类自身免疫力;三是易造成机械损伤,从而继发感染。根据笔者对金湖县网箱养鱼的调查总结。在晴天无风浪时,采用低浓度药液持续均匀泼洒2—3小时,这样 The traditional cage fish medicine is generally taken to lift the cage three horns, fish to a corner after the increase of dose of medication, this method of treatment has the following defects: First, only kill fish body surface Pathogens, and water does not work; Second, large doses of drugs can erode fish gill filaments and fish surface mucosa, reduce the fish’s own immunity; Third, easy to cause mechanical damage, which secondary infection. According to the author of the investigation of cage fish in Jinhu County, concluded. When there is no wind and wave in the sunny days, use low concentration liquid to spray evenly for 2-3 hours