据不完全统计,每年我市有60%～80%的鱼池遭受不同程度鱼病的侵害,其死亡率达到20%～40%,经济损失达到上千万元。根据对我市18个县市、297个乡镇部分水产养殖场的实地调查和诊治结果,认为近年来在我市水产养殖中主要流行的病害有以下几个方面,并提出相应对策供参考。一、养殖环 According to incomplete statistics, 60% to 80% of the fishponds in our city are infested with fish diseases to varying degrees every year, with a mortality rate of 20% -40% and an economic loss of over 10 million yuan. Based on the field survey and diagnosis and treatment of some aquaculture farms in 29 counties and cities in 18 cities and counties of our city, it is considered that the main epidemic diseases in aquaculture of our city in recent years are as follows, and the corresponding countermeasures are put forward for reference. First, breeding ring