轮换用药好处多目前很多养鱼户在鱼病防治中，用药浓度要比常规剂量高出许多才有效。原因是长期使用单一药物，尤其是同一种药物的反复使用，病虫的抗药能力更为明显。因此，防治鱼病应采取轮换用药的措施，来提高防治效果。轮换用药是指以不同品种的药物交替使用来防治同... The benefits of rotation of medicine and more At present, many fish farmers in the prevention and treatment of fish diseases, drug concentration higher than the conventional dose is effective. The reason is that long-term use of a single drug, especially the repeated use of the same drug, pest resistance is more obvious. Therefore, the prevention and treatment of fish diseases should take the rotation of the drug measures to improve the control effect. Rotational medicine refers to the use of different varieties of drugs to prevent and treat ...