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Symptoms and Control Methods of Potato Wart Disease
[Pathogen scientific name] Synchytrium endobioticum (Schilb.) Percival [Host crops] Potato, tomato, black nightshade, etc. [Disease diagnosis] It mainly damages the underground parts of the plant, occurring commonly on tubers and stolons. On the eyes of infected tubers and on stolons, because the pathogen stimulates continuous cell division, tumors of varying size, irregular shape and rough, protruding surface form, resembling cauliflower. The surface of affected tubers often cracks. The wart tissue is yellow-white in the early stage, the part exposed above the soil surface turns green, and later turns dark brown. The tissue is soft, prone to rotting and produces a foul odor, with brown slimy matter. During storage, diseased tubers can still develop, even causing the whole storage cellar to rot. Diseased tubers turn black and give off a foul odor; after prolonged boiling they do not soften easily and are difficult to eat. When the aboveground parts are affected, the appearance does not differ noticeably from healthy plants, but in the later stage diseased plants are taller than healthy ones, remain green longer than healthy plants, have more branches and bear more berries. On severely diseased plants, stems, leaves and flowers can all be affected, forming wart lesions or deformities. The causal agent is the endobiotic chytrid fungus. The pathogen is endoparasitic and does not produce hyphae; the vegetative thallus is initially a naked, wall-less protoplast (amoeboid body), and later becomes a walled unicellular thallus. In the reproductive growth stage, the unicellular thallus transforms into a resting sporangium sorus. The sporangium sorus is nearly spherical and contains 4 to 9 sporangia. The sporangia are spherical, rust-brown, and on germination produce zoospores. The zoospores have a single flagellum and are spherical to pear-shaped. Some zoospores mate to form zygotes. The zygote resembles a zoospore and has two flagella; both can infect the host.
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Prevention and Treatment of Fulminant Hemorrhagic Disease in Silver Carp and Bighead Carp in Hill Ponds and Reservoirs
In 2005, a large-scale die-off of silver carp and bighead carp occurred in the Mianhuatan Reservoir, affecting 200 mu with a mortality rate of 70%. The disease was prone to recurrence and difficult to control, and was diagnosed as fulminant hemorrhagic disease of silver carp and bighead carp. This disease is highly harmful, and fish farmers should attach great importance to it. I. Epidemic situation: The disease readily becomes epidemic from March to May and from August to October each year, with mortality during outbreaks reaching as high as 70-90%. II. Symptoms: "Dark floating head" often occurs, initially at
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Kissing gourami pinecone disease is a common illness.
Pinecone disease (pinecone-scale disease): the scales of the sick fish stand up like a pinecone. Treatment methods: A. Soak the sick fish in a tetracycline aqueous solution at a concentration of 1 unit per 50,000, bathing twice a day for one hour each time. B. Mix a 2% sodium chloride solution with a 3% sodium bicarbonate solution, and give the sick fish a medicinal bath twice a day for 10 minutes each time. C. Add 0.5 g of chloramphenicol per 40 kg of water for soaking.
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What causes jujube witches' broom disease?
Jujube witches' broom is a devastating disease of jujube trees. After a jujube tree is infected, it shows the following abnormal phenomena: 1. Floral organs revert to a primitive state, the flower stalk lengthens to 3-6 times that of a normal flower, and the sepals, petals, stamens and pistils grow abnormally, becoming light green small leaves. On diseased trees with stronger vigor, thin, short, small branches may also sprout from the leaf axils of the small leaves, forming clusters of branches. 2. The main and secondary buds of the developing branches and the fruiting mother branches sprout and grow multiple times a year, continuously producing thin, small, yellow-green branches and leaves that form dense clusters of branches, which do not easily fall off in winter. 3. On the branches and trunk of the whole tree, the originally dormant
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Treatment Methods and Prevention Measures for Rotten Paw Disease in Raccoon Dogs
"Red paw disease" is actually vitamin C deficiency in newborn raccoon dog pups. Its manifestations: the limbs and toe pads of newborn pups become red and swollen, with ulceration, bleeding and erosion between the toes, appearing purplish-red; their suckling ability is weak, they constantly emit faint squeaking cries, and crawl about randomly in the den; some have thickened joints, and the tail becomes edematous and flushed, with the tail tip rotting off. It mainly harms pups within 10 days of age, and mostly occurs as whole-litter outbreaks; if not treated promptly, most die within 5 days. Treatment methods: normally, a complete-nutrition diet should be provided, especially for pregnant female raccoon dogs; daily
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Recent Rice Pest and Disease Occurrence and Control Methods
Since entering July, our city has experienced continuous rain followed by high temperatures after the rain, which is extremely favorable for the occurrence of rice pests and diseases in the later stage. Currently, most of the rice in our city has entered the booting to heading stage, which is precisely the susceptible period for rice pests and diseases. On August 7, our station conducted field surveys in Tangdian, Datun and other areas, and found occurrences of rice blast, sheath blight, and rice leaf roller, requiring urgent control. The specific situation is as follows: Rice blast: Leaf blast was found on Yunhui 290 planted in Xinwafang, Datun, with a diseased leaf rate of 3.6%, disease index of 0.75, and an area of 2 mu. Sheath blight
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Diagnosis and Treatment of Common Skin Diseases in Dogs
Canine skin diseases are relatively complex conditions, caused by bacterial, viral, and neoplastic factors, as well as allergies. In winter, the most common clinical cases are acariasis (mite infestation) and fungal infections. Acariasis is contagious through contact. Affected dogs sometimes show no obvious external signs other than severe itching. Predisposed areas: ear pinnae, elbows, hocks, and abdomen. Lesions range from papules to crusts, sometimes with excoriation or ulcers. Clinical testing: scrape at the junction between affected and healthy skin with a surgical blade (until fresh blood appears), and examine the scrapings under a microscope for the presence of mites.
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A Detailed Explanation of Snake Disease Prevention and Treatment Methods and Key Technical Points
Stomatitis: Stomatitis is a disease to which snakes are highly susceptible. For a sick snake suffering from stomatitis, first rinse the snake's mouth with Rivanol solution, then apply gentian violet solution to both jaws of the sick snake. Rinse and apply once daily, with a treatment course of 10-15 days. Mold spot disease: To prevent mold spot disease, the main effort is to keep the snake's den dry and well ventilated, avoiding dampness. To treat mold spot disease, apply 2% iodine tincture to the mold spot areas, twice daily; for milder cases, recovery can be expected in about 10 days.
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No More Struggles When Giving Your Puppy Medicine: Practical Methods to Handle It with Ease
If your beloved dog is a very obedient puppy, then when giving it pills or other solid medications, you should first command it to sit properly. Open the puppy's mouth, then as quickly as possible place the pill deep in its mouth, then gently close its lower jaw, lift its head upward, and stroke its neck to help the puppy swallow the pill. This process may take a few seconds. However, one of the best methods is to hide the pill (or crush the pill into powder) in food the puppy loves to eat
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How was the disease-resistant, fragrant and soft rice variety Jiuqi Xiang No. 1 bred?
I. Breeding process 1. Parent selection The internationally renowned rice variety Basmati, a superior rare fragrant-soft line obtained by mutation of Basmati original seed through solar radiation at this institute, and Xiangsimiao No. 2 were mixed and used as the male parent, with the conventional short-stalked, high-yielding, good-resistance and widely adaptable Qingzhen No. 8 as the female parent. 2. Progeny selection After a single plant was selected in the late season of 1991, various types of single panicles with medium-short stalks and plant-grain type similar to Xiangsimiao were selected respectively from the segregating materials of the F2 and F3 generations, then multi-generation selection and propagation and single-plant line comparative trials were carried out.
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