Tomato bacterial wilt disease prevention and control method

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Tomato bacterial wilt usually occurs when the plants bloom and set fruit, first the wilting of the top leaves wilting, followed by the wilting of the lower leaves, the last wilting of the middle leaves, and the wilting of one side of the leaves or the whole of the leaves. At the early stage of disease, the diseased plants were wilted during the day and recovered in the early evening. The disease progressed rapidly. Severe diseased plants died in 7-8 days. The bacteria can develop at a temperature of 10-40°C. The optimum temperature is 30-37°C. The disease is in conditions of slightly acidic soil, high temperature and high humidity, continuous cropping, low-lying terrain, poor drainage, potassium deficiency, and root damage. It's easy to happen. Tomato bacterial wilt disease agricultural control measures, first, rotation, implementation and cruciferous or gramineous crop rotation for more than 4 years. In general, continuous crops such as eggplant, pepper, soybeans, and potatoes are avoided. The second is to use anti-resistant tomato varieties such as Kangqing No. 19, Xiangtuo No. 1, Xiangtuo No. 2, Qiu Xing, Suifeng Tomato and so on. The third is to strengthen the cultivation and management. Choose disease-free seedlings, transplant with soil, and reduce root injuries. Sorghum cultivation, avoid flood irrigation. The use of formula fertilization techniques, the end of a fully cooked organic fertilizer or plant ash, change the microbial community. Apply 100-150 kg of lime per acre to adjust soil pH. Appropriate addition of potassium fertilizer and boron fertilizer to improve plant resistance to disease. Dilutions shall be prohibited during high temperatures and watering shall be properly controlled. The diseased plants were immediately removed and burned, and lime was disinfected. After the harvest was completed, the plant residues were concentrated and poured. Old nursery beds are changed to soil or disinfected. Seedling prophylaxis: Scrophulariaceae 30 ml watered 15 kg, irrigated, 7-10 days irrigation 1, irrigation 2-3 times.

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