俗话说,有收无收在于放,多收少收在于管。病虫害防治是贯穿于水产养殖生产的全过程,也是决定渔业生产效益高低的重要因素。鱼、虾、蟹属水生变温动物。比陆生动物易生病、难发现。池内养殖对象发病初期不易发现,一旦肉眼发现有生病的鱼、虾、蟹出现,这时已生病的群体病情已处于中后期,病菌已 As the saying goes, there is income confiscation is put, more income and less income in the tube. Prevention and control of pests and diseases are the whole process of aquaculture production, and also an important factor that determines the level of benefit of fishery production. Fish, shrimp, crab aquatic animal warm. Easier to find than terrestrial animals. In the early stages of the pond breeding object is not easy to find, once the naked eye found sick fish, shrimp, crab appears, when the disease has been sick in the late stage, the bacteria have been