CATDOLL : CATDOLL: What are the symptoms of fish suffering from tricholoma?

1. What are the symptoms of fish suffering from tricholoma?

The pathogen is carp sphaeroides, which parasitizes on the gills or skin of farmed animals. When they are parasitic in large numbers, they can cause increased mucus, and sick fish will have difficulty breathing and slow swimming.

This disease often occurs concurrently with other parasitic diseases of the gills. It is generally prevalent in spring and autumn, with the most suitable breeding temperature being 12-18°C. When the fish are in poor health, the disease may also break out at temperatures above 20°C.

It mainly harms carp, mandarin fish and other fish fry and fingerlings, and is a common fish disease in the fry and seed breeding stage.

Clinical symptoms: The body color of the dead individual is slightly darker, the mouth is open and cannot be closed, the body surface is intact and not congested, the gill filaments are lighter in color, and there is increased mucus on the skin and gills.

When the tail fin and gill filaments were cut off and examined under a microscope, a large number of active oval worms were found, with more than 100 in one field of view. The strong mechanical movement of the worms caused increased mucus secretion and swelling of the gill filaments, leading to breathing difficulties and the death of a large number of fry. Preventive measures ① Thoroughly clean the pond, dry the pond bottom, and kill the parasite eggs;

②During the peak season of disease, use insecticides such as Yuanchongjing regularly to inhibit the reproduction of insects;

③ When the fry are placed in the pond, soak them in 8 mg/L copper sulfate or 2% salt solution for 20 minutes, or soak them in 10-15 mg/L potassium permanganate for 15-30 minutes. Treatment measures ① Spray Xinyang insecticide and copper sulfate mixture 1-2 times in the whole pond, with the dosage of 200 g/mu and 300 g/mu respectively;

②Spray the whole pool with Xieguanlisha or Yuanzojing, and disinfect with chlorine dioxide or povidone-iodine solution the next day;

③ Spray the entire pool with a mixture of copper sulfate and ferrous sulfate, and disinfect with chlorine dioxide or povidone-iodine solution the next day.

2. How to prevent and control chrysalis disease in fish?

This is caused by fish injury or poor water quality. The prevention and control method is to soak the fish in furazolidone solution. You can also put antibiotics such as penicillin and streptomycin in the fish tank. The dosage is 500,000 to 800,000 international units per 50 kg of water. Fish live in water and absorb dissolved oxygen in the water through their gills. The large number of pathogens in the water can easily infect the gills, so the incidence of gill disease is very high. There are many types of fish gill diseases. In order to accurately diagnose and use drugs reasonably, gill diseases can be divided into the following six types: Bacterial gill disease symptoms: The gill filaments of diseased fish have increased mucus, turn black, and are covered with dirt. Severe gill filaments rot and expose bone strips. Pathogen: Poor water quality stimulates the gill tissue, causing the fish to be infected by myxococci, columnar bacteria or other bacteria. Prevention and control methods: (1) Adjust the water quality and eliminate pathogens. First, add new water frequently; second, use Super Bacteria Cleaner A to treat old water to kill pathogens; third, use an aerator to stir the water to increase the exchange of water between the upper and lower layers. (2) Use 0.2-0.4ppm furazolidone to spray the whole pond for treatment, which has significant effects. It can also be prevented and controlled by spraying bleaching powder or other oxygen-containing preparations throughout the pond. (3) Feed bactericidal bait or mix three yellow powder with antibiotics and feed. Symptoms of fungal gill disease: black gill filaments and mycelium. It occurs in ponds with aged water quality during high temperature seasons. Pathogen: gill fungus. Prevention and control methods: Use quicklime to thoroughly clean the pond, and the diseased fish must be destroyed. Malachite green or chlorine dioxide has a certain inhibitory effect on this fungus. The fish pond where the disease occurs needs a large amount of water replacement to improve the water quality. Symptoms of parasitic gill disease: After the early spring, the overwintering fish are weak and the water quality is dirty, which often causes the disease in fish species. Spring fish species often swim in groups at the edge of the pond or downwind. Microscopic examination shows that they are mostly parasitic, such as oblique tube worms and cup body worms. When the disease occurs in the fry pond in summer, the common diseased fish usually float to the surface in groups on sunny days, as if they are lacking oxygen. When they are tamed, they do not go to the feeding table or disperse and continue to float on the water surface after eating for a while. Their appetite is obviously reduced and their growth is slow. When the gill covers of the diseased fish are opened, tissue hyperplasia and increased mucus can be seen. Pathogen: caused by large-scale parasitism of protozoa such as trichodina, trichuriasis gillata, and sphenobarbus. Treatment: (1) Soak the fish in a comprehensive soaking agent when entering the wintering pond in autumn or dividing the pond in spring. (2) Spray the whole pond with copper sulfate plus potassium permanganate 0.5ppm. (3) Spray the whole pond with copper sulfate plus ferrous sulfate 0.7ppm. Symptoms of trematode gill disease: The diseased fish are restless and often jump out of the water, or "explode" during feeding, and the gill filaments are swollen and adhered. Pathogen: caused by large-scale parasitism of monogenetic trematodes such as Dactylopsis, Trichodina, and Sinophylla, often complicated by bacterial gill rot. Treatment: (1) Spray 0.5-1ppm of trichlorfon throughout the pond. (2) Spray 0.3-0.4ppm of super bacteria net type a throughout the pond. You can also spray bleaching powder, chlormethin, chlorine dioxide and other fungicides throughout the pond to prevent secondary bacterial infection. (3) Inject some new water every other day after medication to help the fish recover their appetite. Hemorrhagic gill disease (vascular aneurysm) Due to poor water quality, the proliferation of blue catfish, excessive ammonia content in the water, chemical pollution, and stimulation from pesticides and other pesticides, the gill microvessels produce organic lesions and form aneurysms, which can be identified under a microscope. Prevention and control methods: (1) Change a large amount of water or apply water quality improvers to adjust the water quality. (2) Spray 0.2-0.3ppm of furazolidone throughout the pond to prevent secondary bacterial infection. Symptoms of nutritional gill disease: gill filaments are bent, gill lamellae are bent, atrophied, and arranged irregularly. Cause: Due to the lack of pantothenic acid or other nutritional imbalances in the feed, the fish's immune ability is reduced, which is prone to bacterial infection and parasite invasion. Treatment: Rationally formulate feed to balance amino acids, unsaturated fatty acids, calcium scales, vitamins and trace elements and multiple nutritional indicators. Due to the slightest carelessness when catching and transporting ornamental fish, the fish's skin is injured, or the skin is damaged by parasites. The spores of the mold invade the wound, absorb nutrients, and germinate rapidly. One end of the hyphae goes deep into the muscle, and the other end grows outward to form cotton-like hyphae. When the mold first parasitizes, it is not easy to find it with the naked eye; when the naked eye can see it, the hyphae has invaded the fish's wound and grown from the outside to the inside. The hyphae and the cell tissue of the wound are entangled and adhered, causing tissue necrosis. As the cotton-like hyphae increase day by day, the fish body is overloaded, causing abnormal swimming, loss of appetite, and gradual thinning, leading to death. When infected with mold, it is also affected by the length of light exposure. Long periods of continuous rain or insufficient indoor lighting, sunlight, and other light sources can promote the growth of mold. The skin of fish infected with mold is usually covered with a layer of white film, especially in black and red fish, which makes the fish lose its luster. Then the fish become sluggish and often appear sluggish, floating on the water surface. If not treated in time, the mold spreads on the fish, the muscles of the affected area rot, the appetite decreases, and eventually leads to death. [Treatment Method] Skin mold disease can occur all year round, but is most common in early spring and late winter. In order to prevent the occurrence of Saprolegniasis, care should be taken to avoid damaging the fish and parasite bites during operation, and a small amount of salt can be added to the water to inhibit the occurrence of Saprolegniasis. When the fish is found to be infected with Saprolegniasis, it can be soaked in 3% salt water once a day for 5 to 10 minutes each time to inhibit the growth of mold. Raise the water temperature to 32 degrees to inhibit the growth of Saprolegniasis. It is best to install a 15-watt ultraviolet lamp on the top of the aquarium and irradiate it for several hours a day to effectively inhibit or eliminate the growth of water mold.

3. How to kill the mandarin fish oblique tube worm?

1. Prevention and control measures: ① Before stocking the seedlings, use quicklime to thoroughly clean and disinfect the reservoir and breeding pond. ② Pay attention to the disinfection of water used in the hatching process and temporary breeding. When the seedlings are placed in boxes or stocked, use 7ppm copper sulfate and FeSO4 mixture (5:2) to soak for 10 to 20 minutes as appropriate; ③ Before the bait fish are released, except for the "water splash", each time, use 8ppm copper sulfate to disinfect for 10 to 20 minutes to avoid the bait fish from bringing in pathogens; ④ The oblique tube worm can still reproduce in large numbers when the water temperature is above 20℃, and its harmfulness cannot be ignored. Therefore, it is necessary to take samples for microscopic examination every two days during the breeding stage of fry and fingerlings.

2. Treatment methods: ① Soak the sick fish in 125ppm formalin solution for 10 to 15 minutes, and wash it again after 24 hours to cure it, or spray the entire pond with 18ppm to 22ppm formalin solution to kill the worms at one time. However, after using formalin, the phytoplankton in the pond will be killed and there will be a lack of oxygen in the water. Pay special attention to oxygenation or increase the amount of water change; ② Soak the sick fish in 2% to 3% salt solution for 5 to 15 minutes, and wash it again after 24 hours; ③ Soak the fish in 20ppm potassium permanganate solution for 15 to 25 minutes, and wash it again the next day.

4. Detailed information about Oblique Tubeworm?

As a single-cell parasite, the back of the oblique tube worm is slightly raised, and the surface is very flat. When viewed from the abdomen, the left side is straight and the right side is arc-shaped. The front of the body is thin and the back is thick. It looks like an egg from the ventral side, but once the oblique tube worm is about to die or has just died, it will become round. The abdomen of the oblique tube worm has fine and dense cilia, each of which has uniform cilia, but the rest of the body has no cilia. The middle of the ventral side of the oblique tube worm is exposed, and there is a large nucleus at the back of the body. The large nucleus is round, and the small nucleus is spherical. There is a contractile bubble on each side of the body, one in front and one in the back. There is a cell mouth in the middle of the ventral front of the body. The cell mouth is surrounded by 16-20 thorn rods to form a funnel-shaped mouth tube, and it is tilted 30 degrees to the left of the longitudinal axis of the body. This is the origin of its name.

The most suitable water temperature for the reproduction of oblique tube worms is 5-12℃. Therefore, the disease is prevalent in late spring and early winter every year, and is relatively rare in summer and autumn. Oblique tube worms can live freely in the water for 1-2 days without the host. As long as there is an opportunity, it can be directly transferred to other fish or water bodies. Oblique tube worms often parasitize on the gills, skin and nasal cavity of fish. If the environment is not adapted, oblique tube worms will form cysts and transmit through direct contact or cysts. Fish in fish breeding ponds and small areas of artificial water environments are most sensitive to oblique tube worm infection, and it can cause serious mortality. Oblique tube worms mainly invade the gills and skin of fish, and survive by using the mucus on the gills and skin as nutrition. Therefore, the way to check whether the koi species is suffering from oblique tube worm disease is to observe whether there is a large amount of mucus on the gills and body of koi fish.

5. How to prevent and control Ichthyophthirius vulgaris disease in fish in fish farming knowledge?

Ichthyophthirius is commonly known as white spot disease. The treatment is to change one-third of the water and heat it to 31 degrees to kill the insects and eggs. No need to disinfect again. The cause of this disease is a large deviation in water temperature when changing water, or a sudden drop in water temperature.

6. How to kill tubeworms in low temperature weather?

Use potassium permanganate solution or formalin solution for bath treatment.

Oblique tube worms exist in most areas of my country. They are particularly harmful to fish fry and fish fingerlings in aquaculture. Parent fish after spawning sometimes lose their reproductive ability or even die after infection. The disease season is generally from March to May each year, and overwintering fish are sometimes also susceptible to infection.

After fish are infected with Oblique tube worms, the worms mainly parasitize on the gills of the fish and stimulate them to secrete a large amount of mucus. The main symptoms of the sick fish are: there is a lot of mucus on the body surface, and the mucus on the skin surface will stick to a lot of dirt (so it is also called mud disease). The sick fish have difficulty breathing in the gills and may even suffocate to death in severe cases.

7. What medicine should be used to treat aquatic oblique tube worms?

Use potassium permanganate solution or formalin solution for bath treatment.

Oblique tube worms exist in most areas of my country. They are particularly harmful to fish fry and fish fingerlings in aquaculture. Parent fish after spawning sometimes lose their reproductive ability or even die after infection. The disease season is generally from March to May each year, and overwintering fish are sometimes also susceptible to infection.

After fish are infected with Oblique tube worms, the worms mainly parasitize on the gills of the fish and stimulate them to secrete a large amount of mucus. The main symptoms of the sick fish are: there is a lot of mucus on the body surface, and the mucus on the skin surface will stick to a lot of dirt (so it is also called mud disease). The sick fish have difficulty breathing in the gills and may even suffocate to death in severe cases.

8. How to deal with the oblique tube worms in sweet osmanthus fish?

Bath with potassium permanganate solution.

Oblique tube worm disease is a disease caused by the parasite Oblique tube worm of carp. It is very common in fish, especially in mandarin fish. It parasitizes in large numbers in the gills, skin, and nasal cavity of mandarin fish. In severe cases, the worms will form cysts. This disease can be transmitted through contact or cysts.

When this parasite infects mandarin fish in small quantities, it does not cause much harm. However, when it infects mandarin fish in large quantities, it will cause the mandarin fish to secrete a large amount of mucus, destroy the gill tissue, cause the mandarin fish's breathing to stop, and eventually cause death. This disease can also cause reproductive damage to spawning fish, so it can be said that the harm is very serious.

9. What are the instructions for using the Wheel Tube Worm Cleaner?

It is a new high-efficiency insecticide and food attractant for fishery. The actual application in large-scale water bodies shows that it has the characteristics of strong insecticide activity, broad spectrum, high efficiency, low toxicity and safety. It has a novel alkaloid toxicity and super drug permeability, which can quickly enter the protozoa and destroy the endoplasmic cells to cause death. It has a strong toxicity to the shield ciliates, such as oblique tube worms, wheel worms, filaria, tongue cup worms, cup body worms, septoria, bell worms, three-generation worms, ring worms, and rotifers in the water body, which are parasitic on the outside and gills of fish. It has no adverse effects on fish raised in ponds, including eels, catfish, tuna, sea bass, flounder, turbot, turtle, shrimp, crab, shellfish and conventional farmed fish and other aquatic species.

Scope of application: eel, catfish, snakehead fish, yellow mullet, shrimp, crab, shellfish and conventional farmed fish.

Appearance: Light yellow powder.

Main ingredients: artemisinin anionic surfactant auxiliary material

Usage and Dosage:

1. Use 0.15-0.25ppm for insecticide, that is, 100-150 grams per mu at a water depth of 1 meter. Dissolve the medicine in an appropriate amount of water and spray it over the entire pond. If there are many insects, use it twice in a row with an interval of 24 hours between each use.

2. Use 0.15ppm to kill rotifers. It can be sprayed locally in areas with high rotifer density. If the water is fertile and the pH value is high, some water quality improvers can be used first.

3. Marine aquaculture products must kill shield ciliates in the early stage, with a dosage of 0.3-0.5ppm, and change the water 6 hours after medication. If the water is changed midway, the drug must be replenished to an effective concentration.

4. Methods for killing carp ringworm and three-generation worm in the high-alkali and high-hardness muddy water of the Yellow River Basin in Henan Province: First, use 0.3-0.45ppm, that is, 150-200 grams per mu at a water depth of 1 meter, dissolve the medicine in water and spray it all over the pond. If there are many worms, it can be used twice in succession with an interval of 24 hours each time.

Note:

1. This agent must be used strictly according to the prescribed dosage and accurately calculated after the pool water is diluted evenly with clean water.

Spray the entire pool and it is strictly forbidden to increase the amount and frequency of use arbitrarily.

2. This agent can completely replace copper sulfate, chelated copper, formalin and other insecticides.

It can only be used after all the fish have survived the toxicity test.

3. Since the seawater shield ciliates reproduce quickly, they need to be examined under a microscope every three days. Early killing with timely medication can prevent

Prevent bacterial infections (including Vibrio, Streptococcus, etc.).

4. The drug safety of this agent on other aquaculture species has not yet been established, so the scope of use cannot be expanded arbitrarily.

Mandarin fish is prohibited.

Storage: This medicine should be kept in a cool, dry and sealed place. The validity period is two years.

Packaging: 25 kg/bag.

10. What parasites are California bass most afraid of in the spring? Is it the oblique tube worm?

Be cautious when killing insects in California bass - Eucalyptus essential oil treats Nocardia and parasites in California bass

A farmer in Huzhou, Zhejiang, has a California bass pond totaling 28 acres with a water depth of 1.8 to 2 meters and basically normal water indicators.

The sick fish were sluggish, swam alone, and had a decreased appetite. About 100 fish died every day. The dead fish had lesions on their bodies and ulcerated and bled. The lesions were mostly found in the area behind the starting point of the dorsal fin. The caudal fin sometimes also ulcerated and bled, with local ulceration. The autopsy showed that the spleen was enlarged and blackened, and there were white nodules in the peritoneum and liver. Oblique tube worms and ringworms were detected. The clinical diagnosis was mixed infection of Nocardia and parasites.

The treatment methods adopted are as follows: disinfection (mainly iodine preparations) + oral administration (florfenicol + sulfonamides) + bile acid 1000 grams/ton of feed + eucalyptus oil (Lechang) 1000 grams/ton of feed. After 5 days of treatment, the mortality rate dropped significantly, the liver became rosy, and the number of ringworms and oblique tubeworms was significantly reduced.

analyze:

During the California bass farming process, disinfection is often based on chemical insecticides and anthelmintics, such as formaldehyde, ivermectin, avermectin, mebendazole, etc. Although they have certain insecticidal effects, they are more harmful to California bass.

Nocardia is a conditional pathogen that is widely present in natural water bodies. The incidence of Nocardia is significantly higher after insecticides. This is because insecticides can cause sudden changes in water quality and stress on fish, which can reduce fish immunity and provide opportunities for pathogens to invade or reproduce in large numbers. Therefore, when choosing insecticides, you should choose safe, efficient, and non-toxic insecticides.

Lechang is made from eucalyptus essential oil, which has been included in the food additive catalogues of the European Union and the United States, and has also entered the EU feed additive certification catalogue. It is a proven green, safe and pollution-free feed additive.

According to case studies from across the country, Lechang can effectively eliminate myxosporeans, ringworms, trichodina, trichodina, and catfish in aquaculture, and obvious results can be seen after 5-7 days of use.

From the perspective of the breeding site, Lechang does not harm the fish body, does not affect feeding and growth, and does not damage the water quality.