Peanut stalk rot, commonly known as rotten neck disease, is distributed throughout the country's flower production areas. It usually occurs in the middle and late stages. It quickly wilts after the illness and is later known as susceptible. Fruit pods are often rot or dissatisfaction with species, causing serious losses. The incidence of fields is generally 20% to 30%, and severe cases reach 60% to 70%, even without crops. First, the symptoms The germs invade the plants from the cotyledon or larvae, resulting in yellow-brown water-stained lesions on the root and neck, which turn dark brown and cause root tissue decay. When in wet conditions, the diseased part produces conidiospore (ie, black small projections), the epidermis of the diseased part is easily peeled off, and the fibrous tissue is exposed. When the environment is dry, the epidermis of the diseased area is sunken and closely adheres to the stem. After the adult stage is affected, the whole plant withers in about 10 to 30 days. The diseased part is often attached to the ground at the base of the stem, and sometimes the main stem and collateral branch appear dead in stages. . Second, the incidence of the law The pathogenic bacteria mainly overwintered on the seed and in the soil in the soil, becoming a source of disease in the next year. If the diseased strain is used as a beverage, or if the manure is used to feed the animal's stool, as well as mixed fertilizers produced by mixed diseased plants can also spread. Spreading in the fields is mainly due to rainwater runoff in the fields, followed by strong winds, but the carrying of germs can also spread during agricultural operations. In rainy and wet years, especially during the harvest season, the harvest rate of seeds is high. Therefore, it is not only the main culprit of the disease, but it can also be transmitted through long distances through introduction. Third, control methods 1. Prevent seed from mould and ensure seed quality. (1) Harvest at a proper time to avoid seed moisture and mold; (2) Dry seeds to ensure that moisture content does not exceed 10%; (3) Safe storage, pay attention to ventilation and moisture; (4) Must not use mold seed, degenerative seed (5) Peanuts with peanuts sown in early time have a lighter incidence; (6) Disease-resistant varieties are selected. 2. Rational rotation, preferably with wheat, sorghum, corn and other crop rotations; 3. Apply rotting fertilizer and strengthen field management. 4. Chemical control: Use 25% or 50% carbendazim wettable powder, according to the seed weight of 0.3% to 0.5% seed dressing or according to the seed amount of 0.5% to 1% of the pharmaceutical solution mixed with water soaking, to be able to submerge Seeds prevail, soak for 24 hours and sow.
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