The soil-borne damage caused by fungus Fusarium oxysporum can be transmitted by the seed bacteria, mainly invading the vascular bundles in the stem base. The pathogens propagate and spread in vascular bundles, poisoning the host cells by blocking vascular catheters and secreting toxic substances, and damaging the host's normal absorption and transmission. The function of conduction leads to the impediment of nutrient water transport. Why are the wilt pathogens in the soil and fertilizer? Bean Blight Wilt Disease Symptoms Fusarium wilt is a soil-borne disease. The symptom is that the lower leaves of the diseased plants begin to yellow and then gradually develop upwards. The veins on both sides turn yellow to brown and the veins are brown. The roots of the diseased plants are stunted, and the cortex of the roots is rotten. There are few or no new roots and it is easy to pull up. Scarring of the diseased plants was significantly reduced. After entering the flowering stage, the diseased plants first showed wilting-like conditions and returned to normal in the morning and evening. In the later period, the diseased plants were wilting throughout the day and even died. The prevention and treatment of bean wilt disease (1) Rotation. Implementation of rotation for more than three years, the best conditions for crops with paddy crop rotation. (2) Add lime to improve the soil. In the acid soil, 100 kg of raw lime can reduce the incidence of disease. (3) Pesticide irrigation and control methods are available. In the early stage of disease, 50% carbendazim WP 1000 times solution or 10% double effect lingual agent 400 times solution or 75% thiophanate-methyl wettable powder 1000 times solution can be used, and 50-150 grams per plant, every 7 - Once in 10 days, 2-3 times in a row. 50% carbendazim WP can also be mixed with 200 kg of dry soil, applied to the sowing line, and applied 200 kg per mu.
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