浅谈鱼药选用的四条原则药物防治是鱼病防治技术体系的重要组成部分，因此，科学选用鱼药就显得十分重要。笔者认为。选用鱼药坚持以下四条基本原则是必要的。１．有效原则。这是防治鱼病选择药物种类的首要原则。要求对症下药，使用的药物能够有效地控制鱼病直至痊愈。如... On the four principles of the selection of fish medicine Drug prevention and control is an important part of fish disease prevention and control technology system, therefore, the scientific selection of fish medicine is very important. the author thinks. Use of fish medicine adhere to the following four basic principles is necessary. 1. Effective principle. This is the first principle for the prevention and treatment of fish diseases. Requires the right medicine, the use of drugs can effectively control the fish disease until healed. Such as...