How to control carp spring virus disease?

The onset of carp spring virus disease is limited by season, temperature, transmission route, fish health and aquaculture water. The onset season is in spring, and the water temperature is between 10 ~ 20℃. The virus is mainly transmitted by water, and the infected population is mainly 1 winter fish, and fish with physical injuries are more prone to illness. Most infected ponds are thin ponds. Carp spring virus disease is an acute infectious disease, and the treatment effect is not ideal, so prevention should be paid attention to in production. According to these characteristics, farmers can take the following measures to prevent:

(1) Properly postpone the release time of seedlings in different ponds: conditional farmers can wait until the water temperature reaches about 20℃ after mid-April, which will neither affect the growth of seedlings nor reduce the risk of buying infected seedlings.

(2) Kill parasites and avoid fish body damage: Clinically, diseased fish bodies are often parasitized by rotifers, minnows or dactylogyrus. Therefore, before the fish overwinter and after being put into a new pond, effective insecticidal drugs should be applied to completely kill parasites. In the process of transportation in separate ponds, the operation must be handled lightly to avoid hurting the fish.

(3) Regular disinfection: The infection of carp spring virus disease is generally that sick fish release virus into water, and healthy fish are infected and get sick, and the transmission route is mainly pool water. Practice shows that common disinfectants can kill carp spring virus disease virus in water. Therefore, as long as the whole pond is sprayed with economical and practical disinfectants every 7 ~ 15 days, the spread of carp spring virus disease can be effectively prevented.

(4) Improving the immunity of fish species: In order to reduce the occurrence of spring disease of carp, the management of fish species before overwintering should be strengthened. In addition to measures such as insecticide and disinfection, we should also strengthen diet nutrition. If you can't cope, you can add immune polysaccharides or some antiviral Chinese herbal medicines to your diet to improve the immunity of overwintering fish and make cultured fish strong for the winter. After wintering, feed the fish as soon as possible and recover your strength as soon as possible.

(5) Take epidemic prevention measures to reduce economic losses: once the carp virus disease breaks out in the breeding pond in spring, the cultured carp should be culled, buried or burned according to epidemic prevention requirements, and isolation measures should be taken to avoid huge economic losses caused by the spread of the disease. Fish farming in diseased ponds should be stopped and thoroughly disinfected with disinfectant for more than 2 years.