Peanut stalk rot, commonly known as rickets, rotten neck, rotten neck, roach neck, rotten foot, etc., are distributed in the Yanjin producing areas. The host plant of the disease is known to have more than 20 species. In addition to harming peanuts, it also harms beans, sweet potatoes, and melons. 1. Symptoms: The germ often invades the plants from the cotyledon or larvae, and the victim's cotyledons are dark brown. The pathogen invades the plant neck along the petiole and often produces yellow-brown, water-soaked lesions on the root and neck, which turn dark brown and becomes ill. Development in vertical and horizontal directions causes the stem base to rot. When the lesion expands and wraps around the stem base, the aboveground part will wilt and die. Under humid conditions, the diseased part produces dense black small protrusions, the diseased part is easy to fall off, and the fibrous tissue is exposed. When the environment is dry, the surface of the diseased area is amber-colored and closely adheres to the stem, and the brown and dry rot in the pith is hollow. After the onset of the seedling stage, only 4 to 5 days the whole plant withered. The sites of adult plants were mostly close to the ground at the base of the stems, and the first pair of lateral branches extended to the middle of the stem. After the adult stage of disease, the entire plant withered about 10-40 days. In the early stages, the pods were rotted and the seeds were not true. 2, prevention and treatment methods (1) ensure the quality of seeds: timely harvest, avoid moisture, frozen seeds. During storage, prevent the seed from becoming rotten. Strictly dried seeds, harvested peanuts to the sun hand-cranked peanuts to ensure that the seed moisture content does not exceed 10%. Safe storage. Pay attention to ventilation and moisture, and it is strictly prohibited to co-locate with moisture-absorbing articles such as chemical fertilizers and pesticides. To use resistant varieties. (2) Rational rotation: It is best to work with crops such as wheat, corn and sorghum for 2-3 years. (3) The application of composting fertilizers to strengthen management: concentrated production areas of peanuts, fertilizers with diseased bodies, should be tamped at high temperatures and fully decomposed. Before the planting, we must plow the land deep, open the drainage ditch, and weed and weed to avoid wounds. (4) Chemical control. Pharmaceutic seed dressing: After moistening the dried seeds with fresh water, use 25% or 50% carbendazim wettable powder and 0.25-0.5% of the seed weight. Pharmaceutical spray: Use 50% carbendazim WP 0.5 kg, water 500 kg, after the peanut Qimiao, spray 75 kg per acre.