Control of wheat yellow plague of cultured grass carp

"Barley yellow, white dew heart" is the two key seasons for the high incidence of grass carp disease. At present, with the gradual increase of air temperature and water temperature, grass carp has also entered the season of high incidence of disease.

Grass carp wheat yellow blast refers to a large number of grass carp death caused by grass carp Gill rot disease and red skin disease before and after barley yellow. The obvious symptoms of the disease are as follows: the end of the Gill filament of the diseased fish is rotten with sludge, the Gill filament is ischemic and white to form a spotted Gill; the scales of the diseased fish fall off, the body surface is red, the fin is moth-eaten when the disease is serious, and the base of the fin is rotten. Grass carp wheat yellow plague is a highly contagious disease, if not treated in time, grass carp can be completely destroyed, resulting in the failure of grass carp culture. Although grass carp wheat yellow plague is highly contagious, as long as the prevention work is done scientifically, the disease can be controlled: (1) do a good job of water disinfection and disinfect the water body alternately with dibromohydantoin, bromochlorohydantoin or fish deli every 5 minutes for 7 days. (2) Scientific administration of oral medicine. Once grass carp are found to have signs of disease, drugs with better therapeutic effects (such as erythromycin for aquatic products) should be fed continuously for 7 days. (3) controlling the amount of feeding. Grass carp have the habit of gluttony, and the daily feed intake should be less than 3% of the fish's body weight. (4) forage combination. As the grass contains unknown growth factors that can promote the healthy growth of grass carp, when feeding full-price formula feed, we can match a certain amount of grass according to the actual situation to promote the growth of grass carp.