CATDOLL : CATDOLL: Rapid diagnosis and prevention technology of fish diseases?

1. Rapid diagnosis and prevention technology of fish diseases?

There are many types of fish diseases. Generally, we first observe whether the fish has surface damage, such as body rot, skin rot, gill rot, tail rot, bleeding, etc., and then use a microscope to check whether there are parasites. Then we further dissect the sick fish to observe whether there is enteritis, intestinal ascites, anal swelling, liver enlargement, liver rot, liver erosion, etc. Finally, we test the pond water quality indicators, conduct a comprehensive analysis, and conclude that if we can treat the disease, the chance of cure is still very high! But generally speaking, even if the farmed species can be cured, losses are inevitable. If the treatment is not timely or the right medicine is not given, a large number of deaths may occur, resulting in heavy losses!

Therefore, it is recommended that farmers do a good job of prevention in daily life, adjust the water, improve the bottom, disinfect and sterilize regularly, so as to reduce the chance of disease in farmed animals.

2. Identification and prevention of common fish diseases?

Hello, there are many common fish diseases. Here are some common fish diseases and their identification and prevention methods:

1. White spot disease

Identification: Small white spots appear on the fish's body. In severe cases, the fish's body is covered with small white spots, the fish swims slowly, and has no appetite.

Prevention and control: White spot disease drugs can be used for treatment, or salt water can be added or the water temperature can be increased to improve water quality. At the same time, feed nutrition can be strengthened to enhance fish resistance.

2. Fish mold disease

Identification: Grayish white or black fluffy substances appear on the fish's body, mucus secretion on the fish's surface increases, the fish swims slowly and has no appetite.

Prevention and control: Fish mold disease drugs can be used for treatment. At the same time, the water quality must be kept clean, excessive feeding and excessive density must be avoided, and feed nutrition must be increased.

3. Saprolegniasis

Identification: White or gray fluffy substances appear on the fish's body, mucus secretion on the fish's surface increases, the fish swims slowly and has no appetite.

Prevention and control: Saprolegniasis drugs can be used for treatment. At the same time, the water quality must be kept clean, excessive feeding and excessive density must be avoided, and feed nutrition must be increased.

4. Exophthalmos

Identification: The fish's eyes are bulging, the surface of the eyes is red, the fish swims slowly, and has no appetite.

Prevention and treatment: You can use drugs to treat exophthalmos. At the same time, ensure the water quality is clean, avoid excessive feeding and excessive density, and increase feed nutrition.

5. Fish rot

Identification: Ulcers appear on the fish's body, mucus secretion increases on the fish's surface, the fish swims slowly and has no appetite.

Prevention and control: Fish ulcer disease drugs can be used for treatment. At the same time, the water quality must be kept clean, excessive feeding and excessive density must be avoided, and feed nutrition must be increased.

The above is only a brief introduction to common fish diseases. Different fish diseases have different identification and prevention methods. It is recommended that fish farmers detect fish diseases in time during the breeding process and take correct prevention and control measures to ensure breeding benefits.

3. How to identify and prevent sesame virus disease?

Identify the host:

①Sesame: mosaic leaves, wrinkled, bent stems, and shortened internodes. ;

②Cucumber: Local necrotic spots on the inoculated leaves and systemic chlorotic spots. ;

③Tomato: Systemic leaf curling and deformity. ; Serological detection: The virus purification preparation did not react with the antiserum of potato Y, turnip mosaic and watermelon mosaic viruses. ; Electron microscopic observation: In ultrathin sections, crystalline inclusions and windwheel-shaped (or scroll-shaped) inclusions were seen. The crystalline inclusions were dispersed in the cytoplasm and chloroplasts, while the scroll-shaped inclusions were only seen in the cytoplasm, and there were also a large number of aggregated virus particles. ; Quarantine risk assessment: The pathogen of this disease is sesame mosaic virus, which is non-persistently transmitted by aphids and seriously harms sesame. When Ji Liang conducted a risk assessment, the risk value was 8 points, which is a medium-risk pest. It has occurred in China, but because there is no artificial transmission route, it is a non-quarantine pest. ; Geographical distribution: China.

4. What are the symptoms and prevention of bean virus disease?

1. Symptoms

From the appearance, the plant becomes shorter, grows slowly, the new leaves are wrinkled and mosaic, and the growth is poor.

Bean virus disease often manifests systemic symptoms, and symptoms are obvious after the diseased plants emerge. Because there are many types of pathogens that cause this disease, mixed infections often occur in the field and produce different symptoms. After the plants are infected, the leaves will have clear veins, chlorotic bands, mottled or uneven green parts, wrinkled, twisted, and deformed leaves, plant growth will be inhibited, the plant will be short, flowering will be slow or flowers will fall, flowering and pods will be significantly reduced, the pods will be short, and sometimes green spots will appear.

2. Prevention and control methods

1. Establish disease-free seed fields, select disease-resistant varieties, carefully select seeds, and cultivate strong seedlings.

2. Use dry heat or hot medicine to treat seeds to inactivate the source of toxins and reduce the incidence of disease in the seedling stage.

3. Implement crop rotation, avoid repeated planting, strengthen fertilizer and water management, and increase the application of phosphorus and potassium fertilizers. Remove diseased plants and leaves in time to reduce the source of disease.

4. Take early treatment and continuously treat aphids to reduce the transmission of insect vectors. When aphids are found, spray imidacloprid and other pesticides in time, focusing on the back of the leaves.

5. Combined with spraying foliar nutrients, adding drugs that inhibit and inactivate the source of poison is more effective than using warming drugs alone. In the early stage of the disease, spray 0.1%~0.2% potassium dihydrogen phosphate + urea + ordinary laundry soap (or black soap) in equal amounts for 3~5 times, once every 7~15 days, with dense planting at the beginning and sparse planting at the end, which helps promote plant growth and control the spread of the disease.

6. At the early stage of the disease, spray 1000 times diluted 1.5% alkanol copper sulfate emulsion, or 100 times diluted 10% mixed fatty acid aqueous solution, or 500-700 times diluted 20% morphine copper acetate wettable powder, once every 7-8 days, and spray 3-4 times in a row.

5. How to prevent and control rice virus diseases? What are the methods for preventing and controlling rice virus diseases?

1. Prevention and control strategy[1]: Adopt the prevention and control strategy of “cutting off the source of the disease, controlling pests and controlling diseases” to control the damage caused by stripe leaf blight and black-streaked dwarf disease, while also controlling the stem borer and the chilo suppressalis, laying the foundation for a bumper rice harvest.

2. Time of application: Apply the medicine 3-5 days after transplanting (machine planting); apply the medicine as soon as direct-seeded rice turns green, and apply the medicine for the second time after 5-7 days.

3. Pharmaceutical formula:

①Use 60g of 25% pyrifos + 60ml of 30% thiazolin + 30ml of 2% amino oligosaccharide or 60g of 50% chlorobromoisocyanuric acid mixed with 20-30kg of water for even spraying per mu;

②Use 100 ml of 45% rice poison + 30 ml of 2% amino oligosaccharide or 60 g of 50% chlorobromoisocyanuric acid mixed with 20-30 kg of water per mu and spray evenly;

③Use 15g of 25% pymetrozine + 60ml of 30% thiazolin + 30ml of 2% amino oligosaccharide or 60g of 50% chlorobromoisocyanuric acid mixed with 20-30kg of water for even spraying per mu. III. Precautions 1. To improve the control effect, add 20ml of flusilazole prochloraz, and pay attention to the combination of fast-acting and long-lasting agents, and use different agents alternately;

2. It is necessary to use pesticides for comprehensive prevention and control at a unified time, and use pesticides on weeds along roads, canals and ditches at the same time to ensure the prevention effect;

3. It is prohibited to use highly toxic and high-residue pesticides.

4. Dissolve chlorobromoisocyanuric acid in water first, then add other fungicides and pesticides.

6. How to prevent and control sweet potato virus disease? What are the prevention and control methods for sweet potato virus disease?

Sweet potato virus diseases can be spread through farm tools, aphids, wind and rain, etc., causing large-scale virus infection. Continuous cropping and improper field management will cause severe disease, resulting in a large reduction in sweet potato production.

Essentials of prevention and treatment:

1. Rotate crops reasonably, select disease-free and disease-resistant varieties, and use disinfectants before planting to reduce the spread of bacteria in seed potatoes and cultivate healthy and strong seedlings.

2. After the sweet potatoes emerge, spray the new lipid film 800 times solution in time to protect the plants to isolate the bacteria from infecting and prevent the virus-free seed potatoes from being infected with the virus. Timely control of aphids, whiteflies and other spreading pests to effectively reduce the source of viral diseases in the field.

3. Increase the intensity of field inspections, and remove and destroy diseased plants in a timely manner. Apply more phosphorus and potassium fertilizers, and spray Diguo Zhuangdiling + Baneda Bika potassium dihydrogen phosphate on the leaves to improve the sweet potato's ability to absorb water and fertilizer, and promote the rapid expansion and development of underground tubers. Ensure sufficient water and fertilizer supply in the field to promote high and high yields of sweet potatoes.

7. How to diagnose and prevent Mycoplasma pekinensis disease?

Mycoplasma disease, also known as chronic respiratory disease, is a chronic, contact respiratory infectious disease caused by avian septicemic mycoplasma. [Pathogen] Septicemic mycoplasma. [Epidemic characteristics] Young peacocks are more susceptible than adult peacocks. It can be transmitted through breeding eggs, air, feed, drinking water, egg boxes and utensils. Prevention] ① Strictly prevent the invasion of infectious sources. When introducing breeding peacocks, young peacocks or breeding eggs, you must investigate and understand, purchase them from disease-free peacock farms, and conduct serological quarantine when necessary. ② Protect the mycoplasma-free peacock group, strictly isolate and disinfect, and the breeding peacocks and young peacocks must be isolated and observed for 2 months after introduction. They can only be raised in groups after being checked and confirmed to be disease-free.

③ Prevent cold, heat, humidity, crowding, secondary diseases and stress, and keep the peacock house well ventilated. Give anti-disease drugs 2 to 3 days before and after vaccination.

8. How to prevent and control bitter melon virus disease?

Bitter melon is one of the more common vegetables in summer. It has a short growth cycle and high yield. Compared with cucumber, bitter melon is easier to cultivate and less complicated to manage. However, bitter melon is also prone to some diseases and pests, especially various viral diseases, which are difficult to prevent and control. Therefore, it is particularly important to do a good job in the prevention and control of bitter melon viruses.

The leaves of plants with early onset bitter melon virus disease become smaller and wrinkled, the internodes are shortened, the whole plant is obviously dwarfed, and no or few fruits are produced. The leaves of plants with late onset in the middle and late stages are wrinkled, the leaf color is uneven and mottled, the young shoots and vines are deformed, the growth is stunted, the fruits are small or have pointed tails, and are deformed and twisted.

The prevention and control of bitter melon virus disease mainly includes the following two aspects:

1. Agricultural control: Choose disease-resistant varieties, save seeds from disease-free plants, and disinfect bitter melon seeds before sowing; use medicated soil as covering soil after sowing, and spray insecticide and sterilizer once before transplanting; after transplanting seedlings, spray new lipid film, which can effectively prevent ground water from evaporating and seedling water from transpiration, isolate pests and diseases, shorten the seedling acclimatization period, quickly adapt to the new environment, and grow healthily. When the temperature is high and dry, water should be applied frequently to increase field humidity and reduce aphid damage and virus transmission; spray growth promoters such as yield-increasing bacteria, multi-effect good or new lipid film, or spray a mixture of potassium dihydrogen phosphate, black soap or laundry soap at a ratio of 1:1:250, once every 5-7 days, and spray 4-5 times in a row.

2. Chemical control: There is no good drug that can cure bitter melon virus disease, and we can only prevent the further spread of the virus. First, we need to cure the insects and prevent the virus from spreading through aphids and greenhouse whiteflies. You can choose 6000-8000 times of 25% Aketai water dispersible granules, 10000-15000 times of 70% Aimeile water dispersible granules, 2500-3000 times of 5% acetamiprid emulsifiable concentrate, and add 500 times of new lipid film, and focus on spraying the back of leaves and growth points. Second, spray virus inactivators, such as 400-600 times of 20% virus A wettable powder, which can enhance the resistance and disease resistance of plants to viruses. In the early stage of the disease, use 200-300 times of 5% fungus and virus clearing and add 500 times of new lipid film to spray 1-2 times, which will have a certain effect.

The above are the prevention and control methods of bitter melon virus. I hope it can be helpful to everyone. I wish the bitter melons you grow can grow healthily, and the melons are bitter and crisp!

9. How to prevent and control melon virus diseases?

Everyone must have eaten melons. This fruit is refreshing, crisp and sweet. It is a must-have fruit for cooling off in summer! But such a delicious fruit can also get sick. So how can we solve the common disease of melons - viral diseases?

First, when planting, you can give priority to disease-resistant and disease-tolerant melon varieties. It must be said that this is the most time-saving and labor-saving method;

Second, try to avoid repeated cropping. When planting melons, plant them away from vegetable fields. Do not mix melons with pumpkins. This will prevent aphids from transmitting the virus to each other.

Third, timely sowing and covering with mulch or plastic film for early cultivation can also effectively prevent viral diseases;

Fourth, during the planting process, field management must be strengthened, sufficient base fertilizer should be applied, and phosphorus and potassium fertilizers can also be appropriately applied;

Fifth, seeds can also be treated when planting. Before sowing, seeds can be soaked in 60℃-62℃ warm water for 10 minutes, stirring constantly during the period. After the cold water cools down, soak for another 18 hours, and then germinate and sow.

Sixth, during the growth process, you must pay attention to the elimination of aphids. You can use 2.5% one-time clean EC 500-800 times liquid or 40% dimethoate EC 800-1000 times liquid to eliminate aphids.

Seventh, the last point is that you must remember to spray 20% Virus A wettable powder 500 times diluted, 1.5% Plant Disease Elixir emulsion 1000 times diluted, or 25% Virus K 1000 times diluted for prevention and control in the early stage of melon disease.

To sum up, these are some methods to prevent and control melon virus diseases. I hope they can be helpful to everyone!

10. How to prevent and control pepper viral diseases?

For pepper virus disease, using morpholino can only improve the resistance to the virus, but cannot cure it. There are three measures for prevention: 1. If you find a plant with a virus, pull out the obvious ones. Use anti-virus medicine to spray the leaves, or irrigate the roots, but it is too wasteful. 2. At the same time, use insecticides to prevent aphids and tobacco budworms to prevent them from spreading through their mouthparts. 3. Choose regular seedlings and disease-free planting plots.