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How to prevent and treat common diseases in ayu (sweetfish) farming?
I. Vibriosis 1. Pathogen: mainly Vibrio anguillarum. 2. Symptoms: depending on the species of Vibrio infecting the fish, it can be roughly divided into three types: yellow-liver type, pointed-intestine type and ulcerative type. Sick fish swim weakly, have darkened body color, protruding eyeballs and skin hemorrhages that in severe cases extend deep into the muscle layer; there is congestion and then ulceration on the inner surface of the operculum, the base of the fins and the tip of the snout; the anus is red and swollen; the gills are pale; the liver of sick fish is enlarged, in some cases entirely faded to a yellowish-earth color, in others partially faded and congested; blister-like structures filled with bloody fluid appear in the liver of sick fish; the gallbladder is enlarged, and the
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Rice Major Pests and Diseases in Gejiu City: Occurrence and Control Methods
I. Rice Planthoppers 1. Damage characteristics: Rice planthoppers, also known as white gnats, are migratory pests with the characteristics of long-distance migration and outbreak damage. The common species include the smaller brown planthopper and the white-backed planthopper. They occur in all rice-growing areas of the city, mainly damaging rice, followed by wheat and corn, and also parasitize grasses such as Chinese sprangletop and other gramineous weeds. Adults and nymphs gather in clusters at the base of rice clumps and on leaves to suck sap. The damaged parts show elongated brown spots, and in severe cases the lower stems turn black and the entire plant dies.
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Potato Disease Prevention and Control Methods and Key Technical Points
Disease is one of the important factors affecting the yield and seed quality of winter potatoes. The main diseases of winter potatoes in Yunnan Province and their prevention and control methods are introduced as follows: Virus disease prevention and control methods: select virus-resistant varieties and virus-free seed potatoes; pull out diseased plants in the field; control aphids in a timely manner. Fungal diseases: first, late blight. Prevention and control methods: select disease-resistant varieties and disease-free seed potatoes; promptly pull out central diseased plants and carry out intertillage and weeding; chemical control. Second, early blight. Prevention and control methods: select disease-resistant varieties; chemical control. Bacterial diseases: ring rot prevention and control methods: select
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Proper removal of silkworm excrement can effectively reduce the occurrence of silkworm diseases
Silkworm excrement not only harbors the pathogens of viral flacherie, but is also a breeding and transmission site for the pathogens of many silkworm diseases such as empty-head soft rot, bacterial soft rot, and muscardine. Data show that when pathogen-carrying silkworm excrement from spring-reared silkworms is left for 15 days and then comes into contact with mulberry leaves, it can cause the incidence of midgut-type viral flacherie in silkworms that eat those leaves to reach 75%; when pathogen-carrying silkworm excrement from late-autumn-reared silkworms is left for 1 day and then comes into contact with mulberry leaves, it can cause the incidence of midgut-type viral flacherie in silkworms that eat those leaves to reach 60%, and after 7 days the incidence reaches 100%. Therefore, during routine rearing,
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How to easily diagnose pigeon diseases? Practical methods you can learn at a glance
1. Look at body posture. Sick pigeons are mostly in poor spirits, inactive, isolated from the flock, with ruffled feathers, dull eyes, rapid breathing, wheezing or abnormal sounds from the throat and trachea during breathing, reduced appetite or no eating, excessive drinking, or failure to feed squabs, etc. 2. Look at the eyes. Pigeons suffering from ornithosis, paratyphoid, ophthalmia, mycoplasmosis, and vitamin A deficiency have red, swollen, inflamed eyes with increased discharge. Those with conjunctivitis have congested conjunctiva and dilated blood vessels. With erysipelas or pneumonia, the conjunctiva is bluish-purple. With anemia or malnutrition, the conjunctiva is pale. With organophosphate pesticide poisoning,
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How to do a good job of disease prevention in pigeons during different production periods
(1) For squabs during the brooding period, pay attention to preventing trichomoniasis. Trichomoniasis is mainly transmitted directly to squabs by parent pigeons carrying the parasite, so check whether the parent pigeons are carrying it, and if so, treat them promptly. Pay attention to preventing pigeon pox, which is generally prevalent from March to June, so do a good job of vaccination and mosquito control. Once it occurs, timely surgical treatment should be given. A small amount of low-toxicity mosquito-killing water can also be sprayed on the squabs to prevent mosquito bites, but be sure not to use too much. In addition, pay attention to preventing diseases such as coccidiosis, mycoplasmosis and salmonellosis. (2) Young pigeons kept for breeding
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Fox and raccoon dog mange mite disease must be carefully guarded against in autumn and winter, never be overlooked
In the current season, the breeding of fur animals is entering the fur growth period. In addition to meeting the various nutrients required for fur growth, special attention should be paid to the occurrence of external parasitic diseases. Zhaoyuan Farm has 100,000 foxes and raccoon dogs in stock and has rich experience in the prevention and treatment of lice and mange mite disease. The precautions are introduced as follows: Pay attention to observation. Skin diseases such as lice and mange mite disease cause great harm to fur animal breeding. They should attract sufficient attention from the vast number of breeding farms and breeders. Especially in the current winter fur growth season, inspecting and preventing mange mite disease is work that breeders must not neglect before pelting.
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How to prevent and treat raccoon dog diseases? Detailed answers to thirteen questions
1. What causes a large number of raccoon dogs to have diarrhea? How to prevent and treat it? Answer: When a large number of raccoon dogs in a breeding group have diarrhea, the first thing to consider is the feed problem. Is the feed moldy and spoiled? Is the animal feed rotten? Has the grain feed been stored for too long? Is the salt content too high? Has the grain feed not been processed and cooked thoroughly enough? All of the above situations can cause a large number of raccoon dogs to have diarrhea. For prevention and treatment, the above problems must be solved. At the same time, feeding gentamicin, norfloxacin, chloramphenicol, oxytetracycline, sulfonamides and other drugs all have a certain
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Detailed Explanation of the Symptoms and Prevention and Treatment Methods of Canine Heartworm Disease
This disease is a filarial disease caused by canine heartworm parasitizing the right ventricle and pulmonary artery of dogs (rarely in the thoracic cavity and bronchi), resulting in symptoms such as circulatory disturbance, difficulty breathing, and anemia. In addition to infecting dogs, cats and other wild carnivores can also be infected. This disease is widely distributed in China, and has been found from Shenyang in the north to Guangzhou in the south. [Pathogen and its life cycle] Canine heartworm (also known as dog heartworm) is yellow-white, slender, and thread-like. The male worm is 120-160 mm long, with a spirally curled tail; the female worm is 25
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What are the methods for controlling pests and diseases of jasmine?
1. Diseases ① Brown spot: promptly prune away diseased leaves and diseased branches, and spray the foliage with 80% zineb wettable powder at 500-700 times dilution, or 80% mancozeb wettable powder at 400-600 times dilution, spraying once every 10-15 days, for 3-5 consecutive sprays. When spraying, the front and back of the leaves should be evenly covered. ② Southern blight: in the early stage of the disease, spray the base of the plant and the surrounding soil with 50% amobam aqueous solution at 1000 times dilution, and after 7-10 days, spray once more. After that, use 70% thiophanate
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