云斑、斑点叉尾、黄颡鱼是我市养殖的主要名特优水产品,具有生长快、肉质鲜美,市场适销等特点,在我市池塘、网箱、稻田均有养殖,随着养殖面积及放养密度的不断扩大,鱼病的发生和造成的危害也越来越严重。如柱形病,一年四季都有发生,感染率达30%,死亡率达10%;烂鳍烂尾病,一年四 Cloud spot, channel catfish, catfish is the city’s major aquaculture aquaculture name, with fast growth, delicious meat, marketable and so on, in our city ponds, cages, rice fields are farming, with farming As the area and stocking density continue to expand, the occurrence of fish diseases and the harms they cause have also become increasingly serious. Such as cylindrical disease, occur throughout the year, the infection rate of 30%, the mortality rate of 10%; Rotten fin rot disease, a year four