每年的 4～ 1 0月是鱼病多发季节 ,尤以 6～ 9月最为严重。当前是鱼病发生的高峰 ,必须切实做好防治工作。一、鱼病的预防。鱼生活在水中 ,一旦得了病 ,在治疗和隔离上都比较困难 ,因此要坚持无病早防 ,有病早治 ,全面预防 ,积极治疗的方针。预防鱼病主要从三方面着手 :既要改 4 to 10 months a year is a season of frequent fish disease, especially in June to September the most serious. The current peak of fish disease, prevention and control work must be effectively done. First, the prevention of fish diseases. Fish living in the water, once got sick, in the treatment and isolation are more difficult, so we must adhere to the principle of disease-free and early prevention, early onset and cure, comprehensive prevention and active treatment. To prevent fish diseases mainly from three aspects: it is necessary to change