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What to Do About Early Bolting in Angelica sinensis? Cause Analysis and Control Methods
When growing cluster-type plants, bolting can occur. Among these, bolting can also occur when growing the common Chinese medicinal herb Angelica sinensis (angelica). If angelica bolts and flowers prematurely, it cannot be used medicinally, causing economic losses to farmers.
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How much is Poria per jin now, and how do you use it to remove spots?
Every year from July to September is exactly the harvest season for Poria, and this medicinal herb, sweet and bland in taste, neutral in nature, and with a certain spot-removing effect, has become even more popular in recent years. So how much is Poria per jin on the current market price? How do you use it to remove spots? 1. How much is Poria on the current market price
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Can mancozeb be used as a root drench? Instructions for correct use
The pure product of mancozeb is a white powder, while the technical-grade product is a grayish-white or pale yellow powder. The so-called protection of crops means providing plants with the element Zn; besides solving the symptoms of zinc deficiency, it enhances the plants' ability to resist diseases, thereby relatively speaking playing a bactericidal role.
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Detailed Explanation of Key Strawberry Cultivation and Management Techniques
Because strawberries are rich in carotene and aspartic acid, they have a certain nourishing and regulating effect on the body, and have become a fruit and vegetable product that people love. Now the editor of Tuliu.com will talk about the key management techniques for strawberries. 1. Earthing up: In late September, carry out a thick earthing up together with loosening the soil and weeding,
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What is the easiest thing to grow in a greenhouse? Crop recommendations for beginners
Growing oyster mushrooms in a greenhouse is the easiest. Oyster mushrooms have a simple reproduction method and require only extensive management. If the mushroom beds can be rotated, and the temperature is well regulated, 6-8 batches can be harvested in a year. Using scientific growing methods, each square meter can produce 30 jin of oyster mushrooms, and 1 mu of oyster mushroom greenhouse can produce 19,000
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How to use Bordeaux mixture? A detailed guide to usage precautions
When using Bordeaux mixture, choose pure, high-quality white quicklime and pure blue copper sulfate, and prepare it in non-metal containers; the mixture prepared on the same day must be used up that same day. Use it during the fruit bunch closure and pit-hardening stage (late July to early August), and make sure the berries
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What to do about stiff fruit appearing after flowering in greenhouse nectarines
The solution to stiff fruit after flowering in greenhouse nectarines is to strengthen fertilizer and water management, ensure the tree has sufficient nutrients, control the temperature and humidity inside the greenhouse, and prevent and control pests and diseases. It is mainly caused by weak tree vigor, poor water and fertilizer conditions, poor nutrition before flowering, and poorly developed flower buds.
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How to Grow and Care for Caragana frutex (Yellow Peashrub) and Key Points to Note
When growing Caragana frutex, try to plant it in sandy loam soil with good drainage. When watering, just keep the soil moist; generally during the flowering period, you can appropriately increase the water a little. When fertilizing, apply a water-soluble fertilizer once before flowering in spring, then apply fertilizer once more after flowering, and
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What are the taboos in rice seedling bed management?
Sprayers for rice seedling beds must not be used interchangeably. They need to be cleaned thoroughly before each use, and do not spray repeatedly or miss spots. Pesticides that require washing the seedlings must be rinsed off completely. When mixing pesticides, start by diluting the stock solution first, pay attention to controlling the ratio with water, and adjust the concentration. The best time to spray is
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What fungicide works well to control Sclerotinia rot
For Sclerotinia rot, generally apply 4-5 kg of 50% carbendazim wettable powder per mu, mix thoroughly with an appropriate amount of dry soil and spread it on the bed surface, then rake it into the soil, which can reduce the primary infection source. At the early flowering stage, you can use a 500-fold dilution of 70% mancozeb wettable powder; a 1000-fold dilution of 70% thiophanate-methyl, 50% carbendazim or 40% validamycin wettable powder to spray the stem base, old leaves and ground surface of the plants; start applying the fungicide at the early stage of disease onset, once every 7-10 days, and 2-3 consecutive sprays can achieve effective control. <p style="text-align:center"></p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>1. What symptoms does Sclerotinia rot have?</strong></span></p> <p style="text-indent:2em;">At the seedling stage, red-brown spots appear on the affected stems and leaf stalks, and later they expand and turn white. If the disease occurs at the leaf stage, the leaf margins of the old leaves at the base of the plant are the first to be affected.</p> <p style="text-indent:2em;">The lesions initially appear dark blue-green and water-soaked, and later expand into round or irregular large spots. The center of the lesion is yellow-brown, and the surrounding area is light yellow. Sometimes the outline pattern on the lesion is relatively obvious. In dry weather, the lesion will crack and perforate; in rainy weather, the lesion will expand rapidly and the whole leaf will become rotten.</p> <p style="text-indent:2em;">If the disease occurs on the stem, the pathogen generally appears on the middle and lower parts of the main stem. The lesion initially appears light brown and water-soaked, and later gradually develops into an oval shape. Under humid conditions, the lesion expands rapidly. In the late stage of disease development, the cortex splits longitudinally, and the root stem becomes extremely easy to break.</p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>2. What is the disease pattern of Sclerotinia rot?</strong></span></p> <p style="text-indent:2em;">The pathogen of Sclerotinia rot is Sclerotinia sclerotiorum. The sclerotia are round or irregular in shape, white at first and black later, and the interior of the pathogen is grayish white. The pathogen has a very wide host range. Besides rapeseed, it also affects many other crops such as sunflower and carrot.</p> <p style="text-indent:2em;"><span style="color:#FF0000"><strong>3. How to control Sclerotinia rot?</strong></span></p> <p style="text-indent:2em;">1. Agricultural control:</p> <p style="text-indent:2em;">(1) Develop disease-resistant varieties: cultivate high-yield, disease-resistant improved varieties according to local conditions.</p> <p style="text-indent:2em;">(2) Seed disinfection: through screening, chemical seed soaking and other methods, eliminate sclerotia and kill bacteria on the seed surface, and sow disease-free seeds.</p> <p style="text-indent:2em;">(3) Timely remove diseased residues: after harvesting the crop, promptly burn and clear the diseased residues in the field and beside the roads to reduce the source of the pathogen.</p> <p style="text-indent:2em;">2. Chemical control:</p> <p style="text-indent:2em;">Use special-effect fungicides such as prochloraz and Shibaike for protective treatment. The best application period for prochloraz is from the full flowering stage to the late full flowering stage.</p> <p style="text-indent:2em;">The above is a detailed introduction to what fungicide to use for Sclerotinia rot and its disease symptoms. I hope it is helpful to everyone.</p>
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