罗氏沼虾是从国外引进的一种经济价值很高的淡水虾养殖新品种,目前已在广东、广西、江苏、湖南、湖北、上海等10多个省、市、自治区推广养殖。现将罗氏沼虾几种常见疾病及防治方法介绍如下: 1.虾壳病是目前罗氏沼虾养殖生产上虾苗和成虾常见的一种疾病,它是由于罗氏沼虾受到甲壳质分解细菌侵袭,引起真菌感染所致,使虾壳形成黑色区域。通常虾壳边缘或顶部最易受到侵袭,细菌能迅速通过表皮进入体内,引起内部损伤。治疗方法是,用0.9ppm孔雀石绿和2ppm福尔马林液混合,浸洗病虾15～30分钟,有较好效果。 2.黑鳃病此病主要由水质污染、镰刀霉菌感染等所引起,鳃由红色变为褐色或淡褐色,直至完全变黑,引起鳃萎缩,逐步失去功能。治疗方法是,把病虾 Macrobrachium rosenbergii is a new breed of freshwater prawn introduced from abroad. It has been popularized in more than 10 provinces, cities and autonomous regions in Guangdong, Guangxi, Jiangsu, Hunan, Hubei and Shanghai. Now Macrobrachium rosenbergii several common diseases and prevention methods are described below: 1 shrimp shell disease is currently Macrobrachium rosenbergii farming and shrimp production of a common disease, it is due to Macrobrachium rhamnoides by chitin decomposition of bacteria Invasion, caused by fungal infections, shrimp shell to form a black area. Usually shrimp shell edge or top of the most vulnerable to attack, the bacteria can quickly enter the body through the epidermis, causing internal damage. Treatment is, with 0.9ppm malachite green and 2ppm formalin mixed, dipping shrimp 15 to 30 minutes, with good results. 2. Black gill disease The disease is mainly caused by water pollution, Fusarium infection caused by gills from red to brown or light brown, until completely dark, causing gills atrophy, and gradually lose its function. Treatment is, the sick shrimp