CATDOLL : CATDOLL: What is the treatment procedure for crucian carp hemorrhagic disease in winter?

What is the treatment procedure for crucian carp hemorrhagic disease in winter?

Crucian carp hemorrhagic disease is a common disease of fish in high temperature seasons. In recent years, the incidence of crucian carp hemorrhagic disease has begun to increase, especially viral hemorrhagic disease is more serious, fierce, with high incidence and mortality. Sometimes a pond of crucian carp can die because of it. The prevention and control of crucian carp hemorrhagic disease has become a key task in the aquaculture industry. Let’s take a look at the prevention and control methods of crucian carp hemorrhagic disease!

Symptoms

The peak period of hemorrhagic disease in crucian carp is from May to September every year, and it gradually threatens other farmed fish in the pond, resulting in a large number of dead fish. In the early stage of crucian carp disease, the sides of the fish body, eye sockets, gill covers, fins and other parts are slightly congested. In severe cases, the body surface and fins are severely congested, blood is around the eye sockets, some fish have protruding eyeballs, there is light yellow ascites or red turbid ascites in the abdomen, the intestinal wall is congested, the intestine is inflated with air without food, and there is a lot of mucus. The gill filaments are congested or there is severe anemia.

Causes

There is a lot of silt at the bottom of the pond, and toxic substances are deposited in large quantities. At the same time, the silt also provides a place for the pathogens of explosive hemorrhagic disease (Aeromonas hydrophila, Aeromonas sobria, and Yersinia ruckeri) to breed in large quantities. There is a lack of oxygen in the water, and the water environment is deteriorating. Abnormal weather and excessive temperature changes lead to stress reactions in fish, which reduce resistance.

Treatment

1. For external use: "Mujunxiao" 150 ml/mu*m + "Benzalkonium bromide" 30 ml/mu*m.

2. For internal use: Mix 200g of "Dakebacterium" per 1000kg of fish body weight and 300g of "Induced Stress Relief Type 3" per 40kg of feed and feed once a day for 5 consecutive days.

Precautions

1. If there is an insect disease, kill the insects first, use 40 ml of "Beichongjing" per mu*meter. When raising fish together with grass carp and other fish, you can use crushed wheat mixed with "Dake bacteria" to sprinkle throughout the pond and combine it with granular feed mixed with "Dake bacteria" + "Yingjining Type 3" for fixed-point feeding.

2. If there is a problem with the water quality, it must be improved before medication can be used. Water quality problems can cause repeated bleeding diseases. If the nitrite level is too high, you can use "Water Purification Detoxifier" 500 ml/mu*m or "Jie Shui Ling" 200 g/mum.

3. During the treatment of fish disease or within one week after recovery, there are three "bans": one is to ban pulling nets, two is to ban adding large amounts of water, and three is to ban the application of nitrogen fertilizers such as ammonium urea.