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Causes and Control Methods of Pelargonium Leaf Curl Disease
Pelargonium leaf curl disease, also known as Pelargonium crinkle disease, is a viral disease that has only been found in the Shanghai area. Symptoms: The leaves of infected plants curl downward and become stunted. In severe cases, the plants die. Pathogen: The pathogen is Pelargonium leaf curl virus (PLCV). Disease pattern: The virus is transmitted by sap, grafting and soil; no vector insect has been found. In summer and autumn, the symptoms of the disease are not obvious, and the residual virus-carrying plant debris from pruning can spread the virus.
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What are the control methods for crown gall disease in geraniums?
Control of crown gall disease in geraniums: 1. Before planting, find and pull out diseased plants. When necessary, disinfect the stem base of the seedlings by first soaking in 1% copper sulfate for 5 minutes, then transferring to 2% lime water for 1 minute. 2. Choose soil free of crown gall disease as nursery soil and potting soil. For potted plants that develop the disease, replace with disease-free soil. 3. For plants in the early stages of the disease, use a knife to cut away the gall, then apply lime sulfur mixture residue or Bordeaux paste to the wound, or apply methyl-acetic-iodine solution (50 parts methanol, 25 parts glacial acetic acid, 12 parts iodine flakes) to the gall, which can heal the affected area.
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What are the control methods for geranium brown spot disease?
Control of geranium brown spot disease: 1. Collecting and burning diseased and dead plant tissue is the key to controlling this disease. For potted plants or field beds, waterlogging and damp, shady conditions should be avoided. 2. Before and after the onset of the disease, spray a 50% carbendazim 800 to 1000 times dilution or a potassium permanganate 1500 times dilution, once every 10 days, for 2 to 3 consecutive sprays.
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How to increase the survival rate when propagating geraniums
Geraniums are mainly propagated by cuttings. To increase the survival rate, you must master the following points: (1) Selection of cuttings. Choose branches that are solid inside and have a small cut surface as cuttings. The specific method is to pinch off the growing tip of the mother plant in advance, and after new side branches emerge, cut the branch from the base of the new side branch, close to the mother branch. (2) Cutting time. Cuttings are generally taken in mid-September. If the cuttings are not newly grown side branches, the cut cuttings must be left to dry for at least a whole day.
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Symptoms and Prevention and Treatment Methods of Canine Intervertebral Disc Disease
Canine intervertebral disc disease is the sudden protrusion or extrusion of the intervertebral disc after disc degeneration. Pekingese and Shih Tzu dogs aged 3-6 years are very prone to it, and the thoracolumbar intervertebral discs are more commonly affected. Intervertebral disc protrusion causes paralysis in affected dogs due to spinal cord compression, and the onset is relatively acute, often occurring suddenly. Causes: Due to genetic factors, calcium and phosphorus malnutrition during puppyhood, trauma, autoimmunity, chondrodystrophy, etc., the canine intervertebral disc undergoes degeneration. (1) When the intervertebral disc undergoes cartilaginous metaplasia,
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What types of silkworm diseases are there? A full analysis of common types
Silkworm diseases can be divided into two categories: one is infectious diseases, and the other is non-infectious diseases. Any disease caused by pathogenic microorganisms such as viruses, bacteria, and fungi invading the silkworm body and then multiplying is an infectious disease. It can be transmitted from diseased silkworms to healthy silkworms and is an important factor affecting sericulture production. Any disease of silkworms caused by attacks by arthropods (fly maggots, lice mites), pesticide poisoning, and mechanical trauma is called a non-infectious disease. It cannot cause healthy silkworms to become ill through silkworms as a medium, and it is also an important factor affecting sericulture production.
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Symptoms, Identification, and Control Methods of Black Belly Disease in Scorpions
Also called black rot, it is caused by eating spoiled feed and becoming infected with black mold, or by environmental pollution and unclean drinking water. The disease mostly occurs in summer. Symptoms of affected scorpions are: in the early stage, the scorpion's abdomen turns black, the abdomen swells, activity decreases or stops, and appetite decreases or the scorpion stops eating; in the later stage, black decay appears on the front abdomen, and squeezing it by hand causes black mucus to flow out. This disease has a short onset time and a high mortality rate. Control methods: keep the feed and drinking water fresh and clean, and frequently wash the food dish and water dish; when sick
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What are the treatment methods for red paw disease in foxes?
(1) Clinical symptoms "Red paw disease" is actually vitamin C deficiency in newborn cubs of mink, raccoon dogs, foxes, and other animals. Its manifestations: the limbs and toe pads of newborn cubs become red and swollen, with ulceration, bleeding, and erosion between the toes, appearing purplish-red; their suckling ability is weak, they continuously make faint squeaking sounds, and crawl around restlessly in the den; some have thickened joints, and the tail becomes edematous and flushed, with the tail tip rotting off. It mainly harms cubs within 10 days of age, and mostly occurs as whole-litter outbreaks. If not treated promptly, most die within 5 days. (2) Treatment methods Normally, fully nutritious feed should be provided
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Symptom Identification and Control Methods of Peach Shot Hole Disease
Peach shot hole disease is the most common leaf disease on peach trees. It occurs in peach-producing regions worldwide. It includes three types: bacterial shot hole, mildew spot shot hole, and brown spot shot hole. Among them, bacterial shot hole is the most common and is widely distributed in peach-producing regions across the country. Infection of peach trees by this disease can cause a large number of leaves to develop holes and drop off, branches and shoot tips to die, severely weakening tree vigor, affecting flower bud differentiation, and causing huge losses. In addition to harming peach trees, the three types of shot hole disease also harm stone fruit trees such as plum, apricot, and cherry. [Symptoms] Detailed
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Symptoms and Control Methods of Potato Rhizoctonia solani Disease
〔Pathogen scientific name〕Rhizoctonia solani Kühn 〔Host crops〕Solanaceae, Fabaceae, Poaceae and many other crops; hosts are widespread. 〔Disease diagnosis〕It mainly damages young sprouts, stem bases and tubers. When young sprouts are infected, those that have not emerged rot, forming sprout rot and causing missing plants; after emergence, infection begins with yellowing of the lower leaves and brown sunken lesions on the stem base, 1-6 cm in size. The lesions and their surroundings are often covered with a purple mycelial layer; sometimes on the stem base and tubers there are sclerotia of varying sizes (1-5
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