我县元坑镇一养鱼户2．3苗池塘放养的草鱼在今年5月中旬发生了严重病害，3天内共死亡草鱼110多层，重30多公斤。经请笔者诊治，用药7天后基本控制住病情，现把其诊治技术介绍如下：一、病症1．目测症状病鱼消康，头部、背部发黑，胸、腹鳍，尾鳍等基部充血，并有蛀鳍症状。手摸 Yuancun Town, a county fishing village 2.3 seedlings pond stocking grass carp in mid-May this year, a serious disease occurred, within 3 days of grass carp more than 110 layers, weighing more than 30 kilograms. After the author diagnosis and treatment, medication basically control the disease after 7 days, now its diagnosis and treatment techniques are as follows: First, the disease 1. Visual symptoms of fish Digestion, head, back black, chest, pelvic fins, caudal fin and other basal congestion, and the symptoms of moth fin. Hand touch