鱼类发病前有兆头,准确诊断鱼病,进行对症施治,是避免滥用鱼药、延误防治鱼病良机、减少鱼的发病死亡率、确保养鱼高产稳产的关键。如何诊断鱼病?笔者经多年实践,总结了诊断鱼病的“问、看、查、测、辨”五字法。现介绍如下: Fish before the onset of a sign, accurate diagnosis of fish disease, symptomatic treatment, is to avoid abuse of fish medicine, delay the opportunity to prevent and cure fish diseases, reduce the incidence of fish mortality, to ensure high-yield and stable fish production the key. How to diagnose fish disease? The author after many years of practice, summed up the diagnosis of fish disease “ask, look, check, test, identify” five-character law. Now introduced as follows: