祁阳县城关镇光明村养鱼能手刘权宝,1992年承包一日面积3.3亩的鱼塘,共投放草鱼种408尾,鲢、鳙鱼种分别为507尾和23尾。1992年5月初发现该塘草、鲢、鳙均患有锚头鳋和鱼鲺病,草鱼种还患有鳃隐鞭虫病,5月19日—23日相继死亡56尾草鱼,23日下午开始在池塘使用茶饼和敌百虫治疗,25日只死亡草鱼2尾, In Qiyang County, Guangming Village, Chengguan Town, Qiyang County, Liu Quanbao, contracted to fish ponds with an area of ​​3.3 mu on the 1st of 1992 for a total of 408 grass carp species. The silver carp and bighead carp species were 507 and 23 respectively. Early May 1992 found that the pond grass, silver carp, bream are suffering from Anchovy and ichthyosis, grass carp species also suffer from gills whipworm disease, May 19-May 23 deaths were 56 grass carp, 23 afternoon Began to use tea cakes and trichlorfon treatment in the pond, on the 25th died only 2 grass carp,