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What are the control measures for cabbage yellow leaf disease (defoliation disease)?
Yellow leaf disease in cabbage-type vegetables is a general term for fungal-type yellow leaf disease of cabbage-type crops. Heading cabbage, yellow-bud cabbage and other Chinese cabbages, and pak choi are all affected by yellow leaf disease from north to south. Symptoms appear at the seedling stage. The damaging fungus is Verticillium fusarium of the genus Brassica, belonging to the Deuteromycotina. This disease can be controlled through chemical spraying or field...
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Detailed Explanation of Key Points for Spring Cultivation Techniques of Napa Cabbage
Spring napa cabbage, summer napa cabbage, and early spring napa cabbage do not have a strict harvest period; they can be harvested once the heads have formed. Autumn-winter napa cabbage has a strict harvest period and must be harvested before a low temperature of -2°C occurs. After harvesting napa cabbage intended for storage, orient the heads facing north and the roots facing south, and sun-dry for 2-3 days. Then stack the plants into two rows, ...
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Napa Cabbage Seed Selection Methods and Cultivation Techniques Explained in Detail
Napa cabbage is a leafy vegetable with a large number of leaves, and it forms a head (leaf ball) that is the main harvested organ. Generally, the yield can reach 4000-5000 kg per mu. Napa cabbage has a long growth period, and to achieve high yields, several key techniques must be mastered: 1. Apply sufficient base fertilizer: base fertilizer is the foundation for a bountiful napa cabbage harvest. Generally, old vegetable...
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How to manage napa cabbage? Remember these three key points
Indoor seedling raising. The whole growth period requires 90 to 100 days, of which the seedling period is 30 days. During the seedling period, the required temperature is between 15°C and 28°C. Sow seedlings in early February; seedling raising requires geothermal heating facilities. Seedling containers can be low tubes or plastic pots, or nutrient squares can be cut. Keep the sowing spacing at 8 cm, sowing 2 to 3 seeds per pot or per hole...
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How to manage Chinese cabbage during the rosette stage? These measures need to be mastered
Symptoms: It occurs in all regions and can cause damage both in the field and during storage. The disease usually starts at the base of the leaf stalk and spreads to the entire leaf and then the whole cabbage plant. The diseased part rots, and white cottony mycelium and black sclerotia grow on the surface. On seed-producing plants, the stems are mostly affected; the stalk area is initially light brown and sunken, then turns white, and the cortex decays...
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How to Scientifically Fertilize and Apply Pesticides to Chinese Cabbage
Chinese cabbage can be direct-seeded or raised as seedlings and transplanted, but direct seeding is generally practiced. If seedling raising and transplanting are used, fertilizing the seedbed is very important for cultivating strong seedlings. The standard for seedbed fertilization is generally that the seedbed needed to plant one mu of field (about 35 sq m) is given 200-250 kg of fully decomposed barnyard manure or 1-1.5...
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How to grow off-season cabbage? Detailed planting techniques
1. Spray rice vinegar: From the rosette stage to the heading stage of Chinese cabbage, spray a 300-500 times diluted rice vinegar solution, once every 7-10 days, for 2-3 consecutive sprays, which can increase yield by 15%-30%. 2. Spray rare earth: At the rosette stage, heading stage, and hearting stage, spray 0.03%, 0.05%, and 0.08% rare earth nitrate solutions respectively, for a total of 3 sprays,...
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How to prevent and control Chinese cabbage virus disease? These medication guidelines must be remembered
Agricultural control 1. Choose disease-resistant varieties and avoid continuous cropping. Planting experience has proven that varieties with green stems and green leaves are generally relatively resistant to disease. Do not plant near other cruciferous crops and do not practice continuous cropping with cruciferous crops, which can effectively avoid the occurrence and spread of the disease; 2. Sow at the appropriate time but later, and cover to lower the temperature. According to planting experience, appropriately...
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What medication works well to prevent and control clubroot in napa cabbage
Clubroot in napa cabbage refers to the formation of tumors of varying sizes and shapes on the roots of the cabbage; the tumors are smooth in the early stage and become cracked and rough later, and after cracking they are prone to infection by pathogens. Clubroot not only harms cabbage but also harms many crops in the cruciferous family. Clubroot can affect napa cabbage at the seedling stage, and in severe cases the plants die. This disease...
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What Fungicide Works Best for Controlling Chinese Cabbage Root Rot
Causes of the Disease: Chinese cabbage downy mildew is a fungal disease that mainly affects the leaves, though the stems and flowers can also be affected. After infection, water-soaked chlorotic spots appear on the upper surface of the leaves, later turning yellowish-brown. As the lesions expand, they are often restricted by the leaf veins and become angular in shape. When the weather is humid, a sparse white mold layer forms on the underside of the leaves, and the disease...
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