What are the prevention and treatment methods for common diseases in snakehead fish farming?
The snakehead fish is one of the common economic fish species in China. It is characterized by its large size, fast growth, high returns, and delicious, nutritious flesh, making it deeply loved by people. Our farming area is extremely large, but the phenomenon of disease infestation during farming is becoming increasingly serious. Below, Qinnong Network brings you the prevention and treatment methods for common diseases of the snakehead fish.
1. Hemorrhagic disease
It is caused by infection with multiple bacteria and viruses. When the disease occurs, bleeding streaks appear on the fins and the sides of the gills. As the disease progresses, the bleeding symptoms spread over the entire fish body. The disease develops extremely quickly, and mass death can occur within 3-4 days. It mostly breaks out during the high-temperature period from June to September.
Prevention and treatment methods: In winter, clear and disinfect the pond. When feeding, pay attention to the freshness of the bait; do not feed spoiled or rotten bait. If using live bait, disinfect it before feeding. Strengthen water quality management, disinfect regularly and change the water. When the disease occurs, mix Yufukang No. 2 into the feed, follow the instructions, and it can be cured within a week.
2. Red-skin disease
Red-skin disease is a disease caused by infection with Pseudomonas fluorescens. When the disease occurs, the snakehead fish shows local bleeding on the body surface, followed by bleeding and scale loss, causing the fish to move with difficulty and reducing its food intake, and it often floats on the water surface. After losing the protection of scales, it often becomes infected with saprolegniasis, leading to death.
Prevention and treatment methods: Normally strengthen water quality management. After the disease occurs, promptly splash quicklime to clear the pond to inhibit the growth and reproduction of pathogens, then use disinfectants to sterilize and kill bacteria, and add oral Yufukang to the bait, feeding according to the instructions; it can be cured within 3-5 days.
3. Saprolegniasis
Saprolegniasis is caused by infection with saprolegnia fungi in the water. It can occur at all stages of snakehead fish growth. In the early stage of infection, it is not easy to notice. When the temperature rises to a level suitable for its growth, it suddenly breaks out and begins to reproduce, spreading all over the fish within a few days and finally causing white cotton-like growths on the fish body. When the disease occurs, blood spots appear on the fish body surface, appetite decreases, and the fish gradually becomes emaciated until death.
Prevention and treatment methods: Before stocking, first use lime powder or bleaching powder to clear and disinfect the pond. During rearing, pay attention to stocking density to prevent abrasions when the snakehead fish swims, which would allow pathogens to invade. When the disease occurs, soaking in low-concentration salt water can kill the pathogens.
4. Trichodiniasis
Trichodiniasis is a parasitic disease caused by Trichodina, mainly harming snakehead fish fry. It has no obvious epidemic season and can occur in all four seasons of the year. In environments with high summer temperatures, poor water quality, high stocking density, and insufficient bait, the incidence rate is relatively high. When the disease occurs, it manifests as excessive mucus on the body surface, causing the fish body surface to turn white, slow swimming, and gradual emaciation, and finally death due to breathing difficulty.
Prevention and treatment methods: Strengthen water quality management. Splashing a mixture of copper sulfate and ferrous sulfate can effectively kill Trichodina and provide effective prevention and treatment.
The above are the prevention and treatment methods for common diseases in snakehead fish farming brought to you by Qinnong Network. These are the four common diseases of snakehead fish. From their prevention and treatment methods, it can be seen that the quality of the water determines the causes of disease, so during farming, water quality management must be done well.