How to prevent and cure the purple feather disease of peanut?

How to prevent and cure the purple feather disease of peanut? (1) symptoms of harm: the base or root of peanut stem is covered with a layer of purple-brown mycelium, like a fungal blanket. The mycelium-wound peanut stem and root turned brown, rotted and withered, the aboveground part of the peanut grew poorly, and the leaves gradually yellowed and withered, which led to the death of the whole plant. Early infected pods turn brown and rot, but do not bear fruit. The diseased fruit was covered by purple-brown mycelium, and the kernel of the susceptible pod became dark brown and rotted in the later stage. This disease is called peanut purple feather disease. (2) pathogen and incidence regularity: peanut purple feather disease is a fungal disease caused by mulberry volvularia. The mycelium is purple-brown, the sclerotia is purple-red in the mycelium, the sclerotia is white inside, a layer of basidium is arranged on the solid in dark brown, the basidium is colorless, 4 cells, each cell produces a small stem, small pedicel colorless, conical, terminal basidiospore. Basidiospore colorless, unicellular, ovoid, apex rounded, base slightly pointed. The mycelium and sclerotia of the bacteria overwintered in the soil. The pathogen can invade with peanut root, stem base and pod, and the mycelium expands on the surface of the disease. Disease department contact with the health department, field farming operations, ground water can spread the disease, peanuts are susceptible to weak growth. (3) Prevention and control measures: rotation was carried out in ①. It can be used in rotation with Gramineae crops, especially in water and drought rotation. ② should strengthen cultivation management, increase the application of organic fertilizer, timely drainage and irrigation, promote the healthy growth of peanut, improve disease resistance, reduce harm, and pull out diseased plants in early time. ③ treatment of diseased soil. The application of lime or lime nitrogen in soil has a certain disease prevention effect.