How to effectively prevent and cure chrysanthemum virus disease?
How to effectively prevent and cure chrysanthemum virus disease? Please introduce that virus disease is a kind of disease easy to occur in chrysanthemum, which needs to be prevented and treated. 1. Strict quarantine. The diseased strain of chrysanthemum virus is a virus-carrying body, and strict quarantine should be carried out during introduction to prevent the virus from artificially spreading to the virus-free area or from the virus area to expand the scope of the disease area. 2. Prevention and treatment of virus transmission mediators. To control virus-borne aphids, 40% omethoate or 2000 times of dimethoate or 1000 times of malathion, 20% and 70% aphid can be used to control aphids. 50% peach aphid spray wettable powder 2000-3000 times liquid, spray control peach aphid has a special effect. Pesticides such as dimethoate and malathion also have good control effects on thrips. In addition, using the repellent effect of silver gray film to drive out aphids and other medium insects, there is also a good effect. 3. Breeding disease-free breeding materials. Strips were collected from virus-free plants as propagation materials, and stem tip tissues were available under conditions to cultivate and propagate non-toxic seedlings. The poisonous potted chrysanthemum was treated at 36 degrees for 3 to 4 weeks, which could remove the virus. After heat treatment of chrysanthemum, the virus has been passivated and can be used as breeding material. 4. pay attention to cleanliness and hygiene. In maintenance and management, there is a risk of virus transmission in activities such as seedling transfer, pruning, topping and flower cutting. Because, to pay attention to the sanitary treatment of hands and tools, it is best to wash hands with soap before operation, and first clean up healthy plants, and then sort out diseased plants or diseased plants to avoid human contact with virus transmission. Click for more chrysanthemum planting techniques click to get more flower planting techniques
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How to propagate potted Osmanthus fragrans
What diseases and insect pests do sweet-scented osmanthus trees have? How to prevent and cure it? Please guide the common diseases and insect pests of sweet-scented osmanthus trees as follows: 1. Leaf spot disease. The main harm to the leaves, the initial brown spots, the disease spot is round or irregular, the center of the late gray to gray-white, the edge of the reddish brown, black-gray mildew on the spot. High temperature and humidity.
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How to prevent and cure chrysanthemum red spider?
How to prevent and cure chrysanthemum red spider? Please introduce red spiders: harmful leaves initially show small yellow spots, serious leaves curl, withered and yellow fall off, affecting growth and non-flowering. Control methods: spray 1000 times of triclofenac EC or 1000 times solution of aphids and mites to control aphids for 2 to 3 times continuously. Point.
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