大多数鱼病的发生都有一定的季节性4月中旬到5月下旬为一年中鱼类发病的第一个高峰期,叫“大麦黄”季节。因此,必须抢在鱼病流行前进行药物预防。具体做法如下: (一)、体外鱼病的预防。①漂白粉挂篓法: 1.草鱼食场漂白粉挂篓法:草鱼喜在水面吃食,食场一般用竹杆或草辫搭成三角形或方形的食台架挂篓只数按食场大小而定,一般每个食场挂3～6只,每只竹篓中装漂白 Most fish diseases have a certain seasonal occurrence. From mid-April to late May, the first peak of fish incidence in a year is called “barley yellow” season. Therefore, drug prevention must be grabbed before the fish epidemic. Specific practices are as follows: (a), prevention of fish disease in vitro. ① bleaching powder hanging baskets method: 1. Grass carp food basket bleaching powder method: grass carp hi food in the water, the food court generally use bamboo pole or braid to form triangular or square feeding pedestal hanging basket only according to the size of the food court , Generally hung 3 ~ 6 per food court, each bamboo basket installed bleach