一、养殖情况调查2005年秋冬季节,洛阳地区出现了大面积草鱼死亡,渔农损失惨重。笔者2005年9月～2006年3月,分别对发病死亡较为严重的洛龙区、孟津、吉利等地进行了调查诊治。洛阳地区养殖草鱼的鱼塘面积大都在5～10亩之间,水深1.3～2米,排水不方便,水源以井水为主,塘底淤泥较 First, the investigation of aquaculture 2005 autumn and winter seasons, large-area grass carp Luoyang occurred deaths, fishermen losses. The author from September 2005 to March 2006, respectively, the more serious death of the incidence of Luolong District, Mengjin, Geely and other places for investigation and treatment. Luoyang area of ​​grass carp fish ponds are mostly in the area of ​​5 to 10 acres, the depth of 1.3 to 2 meters, drainage is not convenient, the main source of well water, pond sediment more