Fish Feed Machine Knowleagde

There are many species of catfish, common catfish (soil catfish) bigmouth catfish, clarias catfish (tang catfish) leather clarias catfish (Egyptian clarias catfish) Hakka commonly known as Hua Ge fish. Catfish, Animal Kingdom-Chordate phylum-Chordate subphylum-Radical fishes-Siluriformes-Catfish family-Catfish genus-Catfish species. There are a total of 4 beards on the mouth, which are long on the top and short on the bottom. They are carnivorous and mostly wild. They do not require high water quality and can be cultivated artificially. The growth rate is faster, and some varieties can grow to a large size.  Catfish breeding is very important to prevent diseases, so what are the seven most common diseases of catfish? How to prevent it?

The seven most common diseases of catfish are: 1 black body disease, 2 enteritis disease, 3 air bubble disease, 4 water mold disease, 5 trichoderma, 6 cercosporiosis, 7 third-generation worm disease.

Catfish black body disease
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The body of the diseased fish is black, thin, and stops eating. In severe cases, the body of the fish usually hangs up and hangs on the surface of the water until death. After inspection, there is a round red blood spot on the inner side of the pectoral fin, the fin rays are ulcerated, and mold spots appear on the back of the head. This disease is susceptible to infection at the fry stage. The disease is most prone to disease if the food is insufficient and the water quality is not good. The disease is fast, and the infection is rapid.　　

Prevention and treatment: Keep the water clean and do not use unfermented fertilizers; Sprinkle 2g/m3~4g/m3 of gallic in the whole pool, splash 30g/L of quicklime water in the whole pool, once every other day, splash 2 times~ 3 times is enough.

Catfish enteritis disease
The diseased fish is thin and black, with a swollen abdomen, swimming alone, lightly pressing the abdomen, and there is light yellow mucus flowing out of the anus. Laparotomy shows abdominal water accumulation, intestinal wall congestion and inflammation, reddish purple, especially hindgut, intestinal mucosa ulcerated and shedding. This disease is caused by bacteria or viruses. It mostly occurs from July to August, and it mainly harms fish species and adult fish.　

Prevention and treatment: hang baskets with bleaching powder in the season of disease; sprinkle 1 g/m3 of bleaching powder in the whole pond for 2 days.　　

Catfish air bubble disease
The sick fish are floating on the water, with their abdomen facing the sky, and there is a bubble in the abdomen, which cannot sink. The cause of the disease is mainly due to the excessive application of unfermented organic fertilizers in the pond, or the aging of the water in the pond, too much blue and green algae in the water, the gas in the water is too saturated under strong light, and the fish eat bubbles by mistake.　　

Prevention and treatment: if the transparency of the pond water is too small, it is not suitable to put fish fry; after the disease occurs, quickly inject new water and throw in sufficient live bait, which can make some of the fry discharge bubbles and return to normal; for each water depth of 1 meter, use 1.5 kg ~ 2.0 kg of table salt. Sprinkle the whole pond after the water has a certain effect.　　

Catfish water mold disease
After the diseased fish is infected with water mold, off-white cluster hyphae appear on the surface of the diseased fish, which is like cotton wool. After the hyphae gradually expand, the fish swims abnormally, skin mucus increases, appetite decreases, and finally lose weight and die. The cause of disease is mostly injury during fishing and transportation, or caused by low temperature frostbite.　　

Prevention: Pay attention to the operation and do not damage the fish body. The water temperature in the wintering pond should be controlled above 15°C; use 1 mg of bleach powder per milliliter to sprinkle the whole pond; use 0.4‰ salt and 0.4‰ baking soda mixture to sprinkle the whole pond.　　

Catfish Trichoderma
Individually large trichodes are parasitic on the skin and fin rays, causing body color to become dark, weight loss, and slow swimming. The individual small trichodes are gathered on the edges and gaps of the gills, sliding continuously on the gills, stimulating the gill tissue, and in severe cases, the edges of the gill filaments will turn white and rot, and the diseased fish will be dark and thin, and they will swim slowly near the edge of the pool. When a large number of parasitisms, the growth and development of juvenile fish are blocked or even die.　　

Prevention and treatment: clean the pond thoroughly with quicklime, do not use unfermented organic fertilizer; when the seedlings are divided into ponds, turning ponds, and overwintering, they should be leached with 8 mg/L copper sulfate; 0.7 g/m3 copper sulfate and sulfurous acid The mixture of iron (5:2) was sprinkled all over the pool.　　
Catfish Cercosporiosis
Cercosporidium sinensis parasitizes fish's fin rays and skin, causing gray-white spotted nodules or lumps in the fish body. Mainly harm the seedlings cultivated in the earthen pond.　　

Control: remove excessive silt; use quicklime to kill the spores in the silt; use 0.3 g/m3 to 1.0 g/m3 of crystal trichlorfon all over.　　

Catfish third generation worm disease
Due to the movement of the third generation of parasitic fish, the fish's body surface and gill filaments are damaged, causing the fish to secrete off-white mucus, which can cause mass deaths when severely infected. The disease mainly harms juvenile catfish cultivated in earthen ponds and spreads by means of hosts or water currents. It is popular when the water temperature is about 20℃.　　

Control: When fish species enter the pond, use 2g/m3~3g/m3 of trichlorfon soaking; 90% of the crystals of trichlorfon 0.2g/m3~0.3g/m3 are scattered all over the pond; 0.10 g/m3~0.24 g/m3 of trichlorfon and noodle alkali mixture (ratio of 5:3) is splashed in the whole pond.

Floating feed can greatly reduce the growth of bacteria and reduce the incidence of disease. More and more fish farmers are starting to make their own floating fish feed by extruder . This is the trend of the future breeding industry.