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What fungicide works well to control ginseng black spot disease?
What fungicide should be used to control ginseng black spot disease? Please explain that ginseng black spot disease is caused by fungi of the genus Alternaria infecting the stems, leaves, flowers and fruits of ginseng. It spreads through the air. It occurs easily when there are many rainfall events, high air humidity and temperatures of 18°C-22°C, and spreads to surrounding plants. Stem spots mostly appear in mid-to-late May,...
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How should ginseng damping-off disease be prevented and controlled?
How is ginseng damping-off disease prevented and controlled? Ginseng damping-off disease occurs at the base of the stems of seedlings, mostly underground at the transition zone between dry and moist soil 3-5 cm below the surface. Control methods: 1. Disinfection of "transplanting stock": use 25% fludioxonil suspension seed coating at 5-20 times dilution to mix with seeds, or 50-100 times dilution to dip the "transplanting stock" to kill the pathogens carried by the seeds...
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What is cowpea powdery mildew? An introduction to cowpea cultivation diseases
What is cowpea powdery mildew? An introduction to cowpea powdery mildew disease and its control methods Cowpea powdery mildew occurs mainly on the leaves. In the early stage of the disease, yellow-brown spots appear on the underside of the leaves; after they enlarge, they become purplish-brown spots covered with a thin layer of white powder. The powdery mildew pathogen is also a fungal disease, and on the leaf surface...
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What are the methods for preventing and controlling pests and diseases of oyster mushrooms in summer?
How do you prevent and control pests and diseases of oyster mushrooms in summer? Please describe the methods. The following methods can be used to prevent and control pests and diseases when cultivating oyster mushrooms in summer: 1. Site disinfection. Spray the entire cultivation site with dichlorvos for disinfection, spread a layer of quicklime on the ground, and nail window screens over windows and ventilation holes to prevent pests from entering. 2. Substrate...
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Peanut Cultivation Techniques: What Are the Common Diseases in the Late Stage of Peanut Growth?
What diseases occur in the late stage of peanuts? Please provide guidance. In the late stage of peanut growth, leaf spot disease is the main problem. The common leaf spots are brown spot and black spot, commonly known as spot disease and black rot. Affected leaves show destroyed chlorophyll, causing early flower drop and unfilled pods. Symptoms: Brown spot mainly occurs on leaves...
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Common Pests and Diseases of Camellias and Their Control Methods
Which pests and diseases of camellias need to be controlled? The pests of camellias include aphids, scale insects, red spider mites, rust mites, and leaf-rolling moths. Except for rust mites, they can be controlled with ordinary insecticides. The most serious are rust mites and mite pests, which are powdery white, very small, and hard to spot, attacking specifically the young leaves and tender shoots of camellias, causing the undersides of the leaves to turn yellow as if rusted, twisting the leaves, and preventing new shoots from growing...
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How should bayberry trees be managed to increase yield?
How can bayberry trees be made to increase yield? What methods can achieve this? Please give an introduction. The main reasons for low yield in bayberry trees are low production caused by stunted young trees, excessively vigorous trees, aging trees, low-yielding trees in mixed forests, and trees of inferior varieties. The following methods can be used to renovate the fruit trees and increase yield. Bayberry...
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What are the common pests and diseases of honeysuckle (Japanese honeysuckle) and their control methods?
What pests and diseases need to be controlled when growing honeysuckle? Please provide an introduction and guidance on control methods. The main diseases controlled in honeysuckle cultivation are powdery mildew and leaf spot, and the main pest is aphids, etc. The control methods can refer to the following: (1) Powdery mildew. Powdery mildew is the main disease of honeysuckle, mainly harming the leaves and tender stems...
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Identification of Symptoms and Control Methods for Honeysuckle Brown Spot Disease
What is honeysuckle brown spot disease? How is it controlled? An introduction to honeysuckle brown spot disease is given below: 1. Damage symptoms: This disease mainly damages the leaves. In the early stage of the disease, small yellowish-brown spots appear on the leaves. Later, several small spots merge together, forming round lesions or angular lesions limited by the leaf veins. When humid, the underside of the leaves also bears...
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What are the common diseases in autumn tomato cultivation?
What diseases affect autumn tomatoes? How do you prevent and control autumn tomato diseases? Please provide guidance. The diseases of autumn tomatoes include: viral disease, late blight, leaf mold, early blight, etc.; for detailed control methods, refer to the following: 1. Tomato viral disease: it is a prominent disease of autumn greenhouse tomatoes. The virus sources include tomato yellow leaf curl...
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