Root rot is the general term for root rot caused by the infection of many kinds of bacteria in the growth process of sugar beet. The degree and scope of the disease have been expanding and aggravating year by year. Due to different pathogenic bacteria, they can be classified as dry rot, Fusarium root rot, white peony root rot, and black rot. Several symptoms sometimes appear mixed. Etiology: Mainly depends on beet reproductive status and environmental conditions. Poor terrain, poor drainage, or a high groundwater level have been seriously affected. Soil viscosity, poor permeability, low fertility, weak resistance. Soil drought, compaction, and root growth of beetroots are weakened, and the root hairs are dehydrated and dried, or the roots are cut off by underground pests. The pathogens invade the wound. Beet rotations are short-lived and the ground force cannot be restored, increasing the amount of pathogenic bacteria. In particular, the incidence of serious beetles and pods is serious. Prevention: The current lack of effective control agents, intensive cultivation can reduce the disease. 1 selection. It is selected for cultivation in Pingchuan, which has a low water table, good drainage, and fertile soil. 2 rounds change. In old beet growing areas, 6-8 years of rotation must be implemented to restore soil fertility and reduce the source of disease in the soil. 3 deep plowing. Improve the soil environment, increase soil permeability, increase ground temperature, help beet plant growth, and enhance its resistance to disease. 4 increase fertilization material. On the basis of applying sufficient manure in the year, apply appropriate amount of phosphate fertilizer and use 1/3 of the total amount of phosphate fertilizer as seed fertilizer. Strengthen management, sowing when the average temperature is stable above 5°C. 5 Select resistant root rot varieties. Such as sweet research "301", "302", "303" and other polyploid fine varieties. Home Air Purifiers,Portable Air Purifier,Portable Air Purifier for Car,Mini Portable Air Purifier,Air Purifier Mask Ningbo Shuangtuo International Trade Co., Ltd. , https://www.nbst-sports.com