浅海扇贝养殖是昌黎县海水养殖的主导产业。近年来扇贝养殖面积发展到1.23万hm~2,9万多台。去年养殖产量达8.75万t,产值达2亿多元,该县扇贝养殖面积占全省面积的70％以上。 今年7月以来,该县养殖扇贝突发大面积病害。1.23万hm~2受到不同程度感染,病情严重的 Shallow sea scallop farming is the leading industry in Changli County aquaculture. In recent years, scallop farming area has grown to 13,200 hm ~ 29,000. Last year, aquaculture output reached 87,500 t, the output value of more than 200 million yuan, the county scallops breeding area accounts for more than 70% of the province’s area. Since July this year, the county breeding scallops sudden large area disease. 12,300 hm ~ 2 were infected to varying degrees, the condition is serious