小瓜虫病,俗称白点病,主要危害人工饲养的淡水鱼,不论鱼种或成鱼,在过度密养时都容易发生。只有使用硝酸亚汞才能有效地防治。但硝酸亚汞属剧毒药物,国外已禁用,我国在农业和畜牧业中也停止使用。为寻找代替的药物或方法,我们先后五次使用相同方法应用敌敌畏乳剂防治鱼小瓜虫病,均取得了理想的防治效果。现将1987年第一次应用情 Small melons and bug disease, commonly known as white spot disease, the main hazard to the artificial feeding of freshwater fish, whether fish or adult fish, are prone to occur in the case of over-keeping. Only with mercuric nitrate can effectively control. However, the poisonous drugs of mercury-mercury are banned in foreign countries. Our country also stopped using it in agriculture and animal husbandry. In order to find an alternative medicine or method, we have used the same method five times to apply dichlorvos to prevent and cure the small fish ascaris, and achieved the ideal control effect. Now 1987 the first application situation