CATDOLL : CATDOLL: Prevention and control of grass carp pests and diseases

1. Prevention and control of grass carp diseases and pests

1. Parasitic fish diseases: such as Chinese worms and three-generation worms, use 0.5 kg of insecticide per mu to spray the whole pond, once every other day, and use it twice in a row. 2. Enteritis, gill rot, and red skin disease: ⑴ After finding that a certain number of grass carp species have died due to the "three diseases", the amount of concentrated feed should be reduced immediately or no concentrated feed should be fed, and no green feed should be fed. After stopping feeding for 3-5 days, feed a small amount of green feed mixed with enteritis and gill rot, and then slowly increase the amount of green feed. After the fish disease is relieved, feed a small amount of concentrated feed. ⑵ Soak 5 kg of dried rhubarb slices (crushed) per mu in 0.4% ammonia water for more than 14 hours, spray the whole pond, and use it for 3 consecutive days. ⑶ Use 0.5 g of 99% pure kanamycin powder to adhere to 1 kg of duckweed, and the feeding amount is about 1.5% of the fish body weight, and use it for 1 week. Note: When grass carp are seriously suffering from the "three diseases", avoid using chlorine-containing drugs such as bleaching powder, chlorine dioxide, etc. Otherwise, it will cause the death of a large number of diseased fish.

2. What are the common freshwater fish diseases and types of common diseases of freshwater fish

Haha, there are a lot of them. There is a thick book on fish diseases.

Common diseases of freshwater fish include fungal diseases (gill mold, water mold, etc.), bacterial diseases (enteritis, gill rot, red skin, vertical scales, printing, scabies, etc.), parasitic diseases (Ichthyophthirius, trichodina, ringworm, oblique tube worm, powder disease, etc.), viral diseases (pox, grass carp hemorrhagic disease, carp spring virus disease, etc.), non-biological diseases (bubble disease, algae poisoning, over-acidity and over-alkalinity of water quality), etc.

3. Bacterial enteritis of grass carp

The pathogen of grass carp enteritis is Aeromonas punctata, which exists in natural water bodies and bottom mud. This type of bacteria exists in the intestines of fish throughout the entire breeding process, and healthy fish are no exception. This bacterium is a conditional pathogen. In healthy fish, this species is not dominant and will not cause disease. When the water quality deteriorates, the dissolved oxygen is low, the feed is spoiled, etc., causing the fish's resistance to decrease, the flora in the fish's intestines is unbalanced, and this bacterium prevails and the disease often breaks out. Enteritis in 2-year-old grass carp is generally caused by feeding unclean and rotten bait, or the water quality is too rich, there is too much organic matter, etc.

Prevention and treatment methods of grass carp enteritis:

1. Add new water regularly, sprinkle quicklime water throughout the pool to keep the water fresh, and disinfect and kill harmful bacteria from time to time.

2. Inspect the pond in the morning, noon and evening to understand the water environment, fish life and feeding conditions, pay more attention to the activities of the fish in the pond, and take timely preventive and treatment measures when problems are found.

3. Choose high-quality bait and feed it in fixed quantity and quality, which is conducive to maintaining the integrity of the intestine, reducing the possibility of harmful bacteria passing through the physical barrier, and reducing the occurrence of diseases. For grass carp enteritis, it is particularly important to feed fresh bait, and pick up the uneaten bait to prevent the fish from eating too much.

4. Health care and prevention. Since bacterial enteritis in grass carp is often complicated by viral hemorrhagic disease, it is difficult to achieve the expected effect by using drugs. You can add antibacterial and antiviral Eucommia leaf extract to the daily feed of grass carp, which can not only enhance the fish's immunity and anti-stress ability, but also promote the proliferation of beneficial intestinal bacteria bifidobacteria and lactic acid bacteria, thereby maintaining the balance of intestinal flora.

5. Drug treatment: For fish that have already fallen ill, you can use the method of spraying bleaching powder and oxytetracycline bait throughout the pond for treatment, and use bile acid to protect the liver and gallbladder at the same time. Bile acid can unclog the bile duct to protect the liver and gallbladder, and reduce the damage of drugs to the liver and gallbladder of fish; at the same time, it can also remove bacterial endotoxins and reduce the damage of endotoxins to the liver and intestines of fish.

4. What is the disease of grass carp with red buttocks, rotten gills and black body?

Grass carp gill rot: also known as "aconitum plague", is one of the main diseases of fish in the hot season. In order to ensure good economic benefits of fish farming, it is very important to do a good job in the prevention and control of this disease. The symptoms and prevention methods of this disease are introduced as follows: 1. Symptoms: It mainly harms 1-2 year old grass carp. It is caused by bacterial infection after the gill flaps of fish are stabbed by parasites such as ringworms and trichodina, or mechanical damage such as pulling nets. The gill filaments of diseased fish rot, the terminal cartilage is exposed, the gill flaps become gray or white, and dirt or a large amount of mucus is attached to the edges of the gill flaps; the inner epidermis of the gill cover bone is often congested, and in severe cases, the epidermis of the middle part is often corroded into a round or irregular transparent small skylight, also called "open skylight". 2. Prevention and control measures: 1. On the first day (sunny day), use a mixture of copper sulfate and ferrous sulfate 0.7 g/m3 (5:2) to spray the whole pond or spray with insecticide. 2. Feed gill rot or enterobacterial spirit from the second to fifth day. 3. On the third and fifth days, the entire pool was sprayed with dibromopropane, bleaching powder, chlorpheniramine, etc. (

5. What diseases does grass carp have? (As shown in the picture)

I don't know about fatty liver, but the fatness calculated by the above poster is 1.4, which is a bit low, but it does not match the typical hepatobiliary syndrome and excessive abdominal fat. May I ask if the body length of the original poster is measured to the base of the caudal peduncle or including the caudal fin? You raise grass carp of this size, and it seems that the feed grade is a bit high. If the protein and energy are too high, the growth rate of the fish will be accelerated, but the internal balance of the fish itself will be disturbed. Remember that grass carp is herbivorous.

Which diseases should grass carp pay attention to from September to October?

The "three diseases" of grass carp (enteritis, gill rot, and red skin) are serious and common diseases of grass carp.