Control methods of common diseases of Pomfret

Pomfret is one of the freshwater fish with high economic value. in recent years, with the continuous expansion of market demand, its culture scale is also growing rapidly, but at the same time, the disease continues to worsen. The disease makes the survival rate of Pomfret culture on the low side, affecting the development of Pomfret culture as a whole. The following editor brings you the prevention and control methods of several common diseases in Pomfret culture. Let's take a look.

1. Nerve necrosis virus

Nerve necrosis virus mainly has a high incidence in the fry stage, and the fry will die at a very fast speed after infection, and a large number of fry will die. It also has the characteristics of strong transmission and difficult to control. When the disease occurs, the body surface of the fry is black and will sink at the bottom of the water, and some will float on the surface of the water. Dissecting the diseased fish, you will find that the spleen is bright red and black and swollen in the later stage. The disease is mainly caused by abrupt changes in the environment during transportation and seedling delivery.

Prevention and control methods: after a period of temporary culture, it is best to make the fish fry slowly adapt to the new culture environment, and mainly enhance the physique of the fish fry in the temporary culture stage, which can reduce the incidence of the disease.

2. Enteritis

Enteritis is a bacterial disease, the pathogen is streptococcus, which is the most common disease in Pomfret culture, and it is also the cause of the most deaths in Pomfret culture. It is mainly caused by excessive food intake, leading to indigestion, or because the feed is too dry and hard, Pomfret will also appear indigestion after eating, resulting in the disease. The appearance of the diseased fish has no obvious characteristics. If you expose it, you will find that the intestinal wall is congested and there is a pus in the intestine.

Prevention and treatment methods: feeding should be fixed and quantitative, and the principle of adding more and less feed should be followed when adding feed every day. It is not appropriate to feed too much at one time, so as not to cause indigestion. At the same time, the feed had better be fed after softening treatment. During the attack of enteritis, 5 grams of Qiangkangsheng and 10 grams of normycin can be added to each kilogram of feed, which can be cured in about 5-7 days.

3. Rotten body disease

Rotten body disease is also one of the common diseases of Pomfret. The pathogen is Aeromonas hydrophila. After the disease is infected, small red spots begin to appear on the body surface. With the development of the disease, these small red spots will fester and finally fuse to form a large area of the wound. In the wound to increase the fish muscle exposure, resulting in death, in the pathogen surface damage, the probability of the disease is greater.

Prevention and control methods: pay attention to the culture density to avoid damage to the body surface of fish when swimming. After infected with the disease, add 10 grams of Fish Disease Kang and 5 grams of bacteria per kilogram of feed and feed 10 grams of electrolytic vitamin for 5-7 days, all can be cured.

4. Cucumber disease

Small melon insect is a parasitic disease, when the disease occurs, small white spots appear on the body surface of diseased fish, mucus increases, scales fall off, appetite is weakened or eliminated, when the water temperature is high, white spots will spread throughout the fish body at a very fast speed. When the small melon insect parasites in the fish gills, it will destroy the gills of Pomfret, and finally cause the diseased fish to die with difficulty breathing.

Prevention and treatment: fish out the diseased fish, soak in fresh water for 5-10 minutes to kill parasitic melons, or use trichlorfon and copper sulfate, using the method of hanging bags, once every two days, 3-4 times in a row.

The above are the prevention and control methods of common diseases of Pomfret. I hope I can help you. If you want to know more about Pomfret culture, please follow us.