What are the common diseases of grass carp? Detailed explanation of prevention and treatment methods

Grass carp is one of the important economic freshwater fish species in China. Its flesh is tender, the fish is large, and it has few bones, making it very popular on the market. However, many diseases occur when farming grass carp, harming their growth and lives, and causing no small loss to farming. Below, Qinnong Network brings you the prevention and treatment methods for common grass carp diseases.

1. Gill rot disease

Gill rot disease is the most common disease, prevalent from July to September, with a relatively long onset period. It is caused by Myxococcus, and when it occurs, the fish gills rot and carry mud, the epidermis inside the gills becomes congested, and there is a small rotting hole in the middle.

Prevention and treatment methods: Because it is caused by pathogenic bacteria, attention should be paid to disinfection and sterilization. Bleaching powder can be used for prevention and treatment. Place the bleaching powder in a small bamboo basket with the basket mouth above the water surface. Remember to replace it every day. For feeding, you can choose Yu Kangfu Type A mixed feed for feeding.

2. Red skin disease

Red skin disease mainly harms fry and adult fish. This disease is caused by Pseudomonas fluorescens. When it occurs, the fish scales fall off, and large areas of inflammation appear, most obviously on the fish belly, and the ends of the fins rot.

Prevention and treatment methods: First sprinkle bleaching powder to disinfect and sterilize, then feed the diseased fish sulfathiazole. Pay attention to the dosage: about 1 gram per 10 kg of fish. After feeding for one or two days, halve the dosage, and it can be cured in about a week.

3. Enteritis disease

Enteritis disease is an infectious disease caused by Aeromonas. It is extremely harmful, and because it is often discovered slowly, it can infect the entire fish school. When it occurs, the fish abdomen swells, black appears on the body surface, especially on the head, the intestinal wall of the diseased fish becomes congested and is accompanied by yellow mucus, and grass carp have poor appetite or do not eat. If not treated in time, it will quickly lead to death.

Prevention and treatment methods: Sprinkle bleaching powder at 1 gram per cubic meter, and feed Yu Fukang Type A mixed with bait, twice a day. On the second day, feed sulfaguanidine, also 1 gram per 10 kg of fish.

4. Hemorrhagic disease

Hemorrhagic disease is caused by reovirus. When it occurs, the whole body of the fish becomes congested; the muscles, fins, oral cavity, gills, intestines and stomach all become congested. If the skin or gills are opened, the fish flesh will be found congested and the gill filaments whitish.

Prevention and treatment methods: Inject a vaccine when the fish are young, which can provide immunity to this disease for more than one year. When the disease occurs, sprinkle quicklime to disinfect, then feed with fish-specific Keliao-Yu Fukang bait, once a day, and it can be cured within a week.

The above are the common disease prevention and treatment methods for grass carp brought to you by Qinnong Network. For grass carp diseases, prevention is the main focus, and prevention is more important than treatment. During farming, observe the fish's activity and feeding conditions carefully, and treat diseases promptly when they are found.