当前,水产养殖业蓬勃发展,单产逐年提高带来了明显的经济效益和社会效益。但随着养殖规模的扩大,集约化密度的加大和池塘老化问题,使鱼病发生频繁,甚至已成为了制约水产养殖业发展的一个重要因素。与此同时,各地鱼药生产厂家和个人纷纷将产品投放在北 At present, the aquaculture industry is booming and the annual yield increase has brought obvious economic and social benefits. However, with the enlargement of breeding scale, the intensification of intensification and the aging of ponds make the occurrence of fish diseases frequent and even become an important factor restricting the development of aquaculture. At the same time, around the fish manufacturers and individuals have put products in the North