Prevention of fulminant hemorrhagic disease in fish

In autumn, with the rapid growth of fish, the pond culture density increases, the water quality is easy to deteriorate, and the reproduction rate of various pathogenic pathogens is accelerated, which can easily lead to the occurrence of fulminant hemorrhagic disease. Preventive measures are as follows:

1. Before the seedlings go into the pond, they must be sterilized with 1% Mel 2% salt water. The bathing time depends on the physique and temperature of the fish. When the conditions permit, the fish can be soaked with fulminant hemorrhagic disease vaccine.

2. Change water and increase oxygen at the right time. Keep the water quality fresh and change the water frequently. If the condition is limited, it is inconvenient to change water, the whole pool can be sprinkled with raw lime slurry, and the aerator should be used reasonably at the same time.

3. Water disinfection and oral drug prophylaxis should be carried out regularly. Environmental protection drugs such as dibromohydantoin and bromochlorin can be used to disinfect the water body alternately every 10 minutes and 15 days, and beneficial microbial preparations are used to improve the water quality every 5 days after disinfection. In the feed mixed with appropriate amount of berberine hydrochloride, aquatic special erythromycin and other safety drugs, 5 days as a course of treatment, 1 Mel 2 courses per month.

4. Reasonable close culture and mixed culture. When the culture density is too high, it is necessary to catch and dredge in batches, maintain a reasonable culture density in the pond, and try not to let the water environment bear overloaded fish stocks.

5. Choose medium-and high-grade feed, and use less feed raw materials (raw bran, corn, @ # @ 245mm, etc.) and low-grade feed.

6. Scientific bait, adding new water in time when the water quality is too strong.

7. Pay attention to the hygiene of the pond. Usually, weeds should be removed frequently and food grounds should be cleaned, leaving no residual bait. Dead fish should be fished out of the pond in time and be treated innocuously.