The stalk blight disease, also known as cockroach, can occur throughout the growth period of the cockroach, causing no scab or knots. The characteristics, symptoms and methods of prevention and treatment are described below: Fusarium stalk blight is a fungal disease, and stalks, leaf sheaths, and flower organs suffer damage. Sheath susceptibility, primary dark green water spot irregular lesions at the base, then expanded to the entire leaf sheath, the surface more black spots (spore discs of pathogens), and finally the disease department was grayish white. Stem damage is mostly caused by lesions on leaf sheaths. It is dark green water stains at the beginning. It is generally spindle-shaped, sometimes oval or concentric ring-shaped. The disease is soft and hollow, and the surface has black spots. The lesion can be connected to a large dead spot. When the humidity is high, a mild gray mold layer can be seen on the surface. Floral organs are affected. Symptoms resemble those of the stems. They often occur in scales or in the ears and neck, resulting in yellowish flowers. The pathogens overwinter in the bulb, diseased body and soil with mycelium and conidium discs.è¸è When the conditions are appropriate after transplanting, the germs invade, the diseased part produces conidia, and reinfestation occurs by wind and rain or irrigation water. Continuous cropping, premature colonization, and high density; high temperature and heavy rain or heavy haze weather, long-term irrigation; excessive application of nitrogen in early or lack of phosphorus and potassium fertilizer, plant weakness, etc. will make the disease worse. The Yancheng region generally began to develop in the middle and early August and peaked in the middle and late September. Prevention of stalk blight should be based on agriculture, supplemented by chemical control. (1) Three years or more of rotation with potatoes, watermelons, etc. (2) Choose Yuhang Dahongpao and 87-1 resistant varieties. (3) Bulbs or seedlings are treated with medicaments. Prior to the germination, the tip of the seed pods was removed 0.5 cm and immersed for 18-24 hours with 50% carbendazim WP 500 times or 70% thiophanate-methyl WP 800- to 100-hours before colonization. hour. (4) Strengthen management. Select fields with shallow plough layers, loose soil, high phosphorus and potassium fertilizer content, and convenient drainage and irrigation. Timely transplanting, reasonable close planting, usually early water sorghum transplanting in mid-to-late June, 2000-2500 strains per acre; late sorghum planted in mid-July, 4000 4000-4500 per acre. Apply more farmyard manure, control the amount of nitrogen fertilizer, increase phosphorus and potassium fertilizers, and enhance plant disease resistance. Before the harvest, combined with 50-80 kilograms of organic fertilizer per acre or 3,000 kilograms of rotten farmyard fertilizer, the topdressing should be applied with phosphorus and potash, and sprayed with 0.2% potassium dihydrogen phosphate solution or spring spring 883 and other foliar fertilizers. Reasonable temperature regulation and humidity control, water layer management on the live seedlings should be suitable for shallow water irrigation, the peaks from the peak to the expansion of bulbs should adhere to the alternating wet and dry, and early waterlogging should be put in water before and after the beginning of autumn, and it should be baked until there are small cracks. Fertilize about 20 days. Separate irrigation and drainage to avoid string irrigation or flood irrigation. Timely removal of diseased plants, the density of the field can be pulled out of some thin and weak seedlings. After the harvest, the straw and bulbs were cleaned up and the remaining fields were removed after the spring of the second year. (5) Chemical control. Always conduct inspections before and after the closure for early control. Use 25% Prochloraz EC 1000 times, or 12.5% ​​diniconazole WP 2000 times, or 50% Carbendazim WP 500 times for 10 days. Once, continuous prevention and treatment 3-4 times, liquid detergent can be added 0.1%. Fried Dried Onion,Fried Onion Flakes,Premium Grade Fried Onion,Crispy Fresh Fried Onion Xinghua Dongbao Foods Co.,Ltd , https://www.xhdongbaofoods.com