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How to prevent and treat fish outbreak of hemorrhagic disease in autumn

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Fish are prone to outbreak hemorrhagic disease in autumn. This disease has a sudden onset, spreads quickly, lasts a long time in its epidemic period, and has a high mortality rate and causes great losses. Once it breaks out, it is difficult to control, and the condition easily recurs. Fish farmers should strengthen their awareness of prevention to prevent the occurrence of this disease. 1. Fish fry disinfection: Before fish fry are put into the pond, they must be disinfected by soaking in 1%-2% salt water. The soaking time depends on the fish's physique and the temperature. When conditions permit, fish fry can be soaked with outbreak hemorrhagic disease vaccine. 2. Timely water changing and oxygen increasing: Keep the water quality fresh and change the water frequently. If

Fish are prone to outbreak hemorrhagic disease in autumn. This disease has a sudden onset, spreads quickly, lasts a long time in its epidemic period, and has a high mortality rate and causes great losses. Once it breaks out, it is difficult to control, and the condition easily recurs. @#@233@#@ farmers should strengthen their awareness of prevention to prevent the occurrence of this disease.

1. Fish fry disinfection: Before fish fry are put into the pond, they must be disinfected by soaking in 1%-2% salt water. The soaking time depends on the fish's physique and the temperature. When conditions permit, fish fry can be soaked with outbreak hemorrhagic disease vaccine.

2. Timely water changing and oxygen increasing: Keep the water quality fresh and change the water frequently. If water changing is inconvenient due to conditions, quicklime can be slaked into slurry and splashed over the whole pond, and aerators should be used reasonably.

3. Regularly disinfect the water body and use oral drugs for prevention: Every 10-15 days, alternately disinfect the water body with environmentally friendly drugs such as dibromohydantoin and bromochloro hydantoin. After disinfection, wait 5 days before using beneficial microbial preparations to improve water quality. Mix appropriate amounts of safe drugs such as berberine hydrochloride and erythromycin specially for aquaculture into the feed, with 5 days as one treatment course, and feed 1-2 treatment courses per month.

4. Rational dense stocking and mixed culture: When the stocking density is too high, carry out rotational harvesting and thinning in batches to maintain a reasonable stocking density in the pond, and try not to let the water environment carry an overloaded standing fish biomass.

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

6. Pay attention to pond sanitation: Usually remove weeds frequently and clean the feeding area, do not leave residual bait, and promptly remove dead fish when found and carry out harmless treatment.

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