Control of root rot of Schisandra chinensis

Root rot of Schisandra chinensis, commonly known as rotten ankle disease and choking disease, is one of the main diseases in Schisandra cultivation. At present, the incidence area is more common and the harm is more serious. The disease usually occurs from May to early August. At the beginning of the disease, the epidermis at the junction of the root and the ground (root neck) blackened, further cortical decay, shedding, forming a ring, the leaves wilted, and the whole plant died a few days later. The cause of the disease was related to physiological diseases. The ground changes violently in early spring and late autumn, the temperature difference is large, the tissue in the root and neck is tender, the disease resistance is decreased, and the fungus infected by freezing in the cortex will rot. In waterlogged and waterlogged land, the disease is more serious in clayey soil, and the disease is more serious in plants with weak development and poor maturity of branches and vines.

Control method: ① chooses loam and sandy loam with high dryness and no low-lying water to cultivate Schisandra chinensis. ② should strengthen comprehensive management, apply more organic fertilizer and pay attention to drainage in rainy season. About 30 cm thick soil is added to the root before freezing in autumn to prevent frost damage to the root neck. The roots and plants were less damaged in ③ production. At the initial stage of the onset of ④, the roots were irrigated with 50% carbendazim wettable powder or 30% soil bacteria water repellent.