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鱼病的发生与外界环境条件、病原体的数量、毒性以及鱼体本身的健康状况等因素有关，要控制鱼病的发生和流行，必须坚持预防为主及时治疗，现就对症下药和正确用药两个方面谈谈提高药物防治鱼病的效果。1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。当鱼塘中鱼的
The occurrence of fish diseases is related to external environmental conditions, the number of pathogens, the toxicity and the health status of the fish itself. To control the occurrence and prevalence of fish diseases, we must uphold the principle of prevention and timely treatment. In terms of improving the effectiveness of drug prevention and treatment of fish diseases. 1 The right remedy The right remedy is to decide whether the prevention and treatment of fish disease is effective and the size of the key. When fish in fish ponds