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白鲢暴发性流行病是近几年出现的一大鱼类传染病,该病发病迅速,潜伏期短,可使鱼类在3—4天内大批死亡,并且流行期长,春、夏、秋三季均可发病,尤以5月下旬至9月为甚,危害极其严重。下面介绍该病的主要症状和综合防治技术: 一、主要症状:病鱼腹部、体侧充血,出现红斑或红点;鳍条基部、鳃盖上、下颌、眼睛也充血发红;同时,肛门红肿,有腹水,肠道内食物很少或没有,肠壁薄而透明,局部或全部充血发炎。二、综合防治方法 1、预防:①狠抓消毒关。每年干塘后要清除多余的淤泥,用75—100kg/亩的生石灰消毒,7天后再放鱼。鱼种放养前
The outbreak of silver carp is a major infectious disease of fish in recent years. The disease is characterized by rapid onset and short incubation period, which can kill large numbers of fish within 3-4 days and have long prevalence, spring, summer and autumn Can be disease, especially in late May to September is even more serious harm. The following describes the main symptoms of the disease and comprehensive prevention and treatment techniques: First, the main symptoms: diseased fish abdomen, body congestion, erythema or red spots; fin base, gill cover, jaw, eyes also congestion and redness; the same time, Inflamed, with ascites, little or no food in the intestine, thin and transparent intestinal wall, partial or full congestion and inflammation. Second, a comprehensive prevention and control methods 1, prevention: ① pay close attention to disinfection. Every year dry ponds to remove excess sludge, with 75-100kg / acre of lime disinfection, and then release the fish after 7 days. Fish stocking before