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肆虐多年的暴发性鱼病,使许多单位和个体养鱼户每年减产5—10％,为治疗此病而化去的药费少则每亩几十元,多者达上百元。如海盐县秦山镇北段村渔场有池塘150亩,年年被鱼病困扰。据该场场长介绍近几年因病害而死鱼的数量:1990年为2500多公斤,1991年为5000多公斤,1992年为5000多公斤,1993年为3500多公斤(不包括因泛塘死鱼的5000多公
The outbreak of fish diseases that have been raging for many years has caused many units and individual fish farmers to cut their annual output by 5-10%. As for the treatment of this disease, the amount of their drug bills varies from several tens of yuan per mu to more than a hundred yuan. For example, there is a pond of 150 mu in the fishery of the north section of Qinshan Town, Haiyan County, which is haunted by fish diseases every year. According to the director of the field, the number of dead fish in recent years due to diseases was over 2500kg in 1990, more than 5000kg in 1991, more than 5000kg in 1992 and more than 3500kg in 1993 (excluding Pan Tong More than 5,000 dead fish