要制止鱼病的发生和流行,应坚持“预防为主”的方针,“无病先防,有病早治。”在鱼病防治工作中,要提高药物效果,应做好以下几点:一、对症下药对症下药是决定防治鱼病是否有效及效果大小的关键。当池塘中鱼的摄食突然减少或表现出发病症状 To stop the occurrence and prevalence of fish diseases, we should adhere to the principle of “prevention first” and “prevent disease first and cure early.” In the prevention and control of fish diseases, in order to improve the drug effect, the following should be done: First, the right remedy The right remedy is to determine whether the prevention and treatment of fish disease is effective and the size of the key. When the fish in the pond suddenly drops or shows symptoms of onset of feeding