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最近10年,我国的水产养殖业发展极其迅速,养殖水面扩大,产量增加,经济效益、社会效益显著。但由于实施了高密度饲养及过度投饵、施肥,再加上池塘老化和受工业废水污染等多种原因,致使鱼虾病害发生年趋严重,特别表现在各主要渔区的大面积病虫害,造成严重的经济损失。早在60年代
In the recent 10 years, the aquaculture industry in our country has witnessed an extremely rapid development. The water surface of aquaculture has expanded, the output has increased, and the economic and social benefits have been remarkable. However, the implementation of high-density feeding and over-feeding, fertilization, coupled with pond aging and industrial wastewater pollution and other causes, causing fish and shrimp diseases become more serious, especially in the major fishing areas of pests and diseases, Cause serious economic losses. As early as 60 years