What are the prevention and control methods for fish autumn plague?

In autumn, fish are highly prone to acute diseases with extremely high mortality rates, such as emaciation disease, small claw worm, gill rot disease, and water mold, commonly known as "autumn plague." To prevent and control outbreaks of "autumn plague" in fish, seven key points should be well managed.

1. Improve the ecological environment. Pay attention to ecological prevention and control, appropriately feed full-price concentrated feed, tender grass, etc., to meet the nutritional needs of fish growth as much as possible, so as to improve their immunity.

2. Actively add fresh water. Adding fresh water can bring in oxygen and various nutrient elements, and can also dilute organic matter and toxic biological metabolites in the pond water, which is beneficial for disease prevention.

3. Pay attention to water quality improvement. Quicklime, bleaching powder, microbial preparations, etc. can be applied.

4. Strengthen deworming of fish bodies. External parasitic diseases of fish are triggering factors for many diseases, so observation must be strengthened to achieve thorough deworming and eliminate the harm of various complications.

5. Appropriately add medicated bait. Regularly add appropriate amounts of vitamins, allicin, etc. to fish feed to enhance the disease resistance of fish bodies.

6. Avoid carp stirring. In ponds with a relatively large number of stocked carp, corresponding concentrated feed should be added for feeding, so that the naturally active carp can be kept full and lazy as much as possible, avoiding muddying the pond water.

7. Neutralize the pH. In autumn, ponds are often slightly acidic, and in acidic environments, fish have slowed metabolism, reduced feeding, poor digestion, and weak disease resistance, so quicklime should be regularly applied in appropriate amounts to neutralize the pH.