Sensitive potato skin has different sizes and different shades, so it is called scab. After the scab, the lesions are limited to the cortex, but the diseased potatoes are not resistant to storage and their appearance is ugly. The disease has a great influence on the quality of potatoes, resulting in a decrease in the value of the goods. Cause the spread of scab, first, the seed potato was sown without soaking. Second, it was unable to avoid the repeated planting of crops such as potato, radish, carrot, beet etc. During the expansion period, it encountered high temperature and dry weather. According to the pathogenesis and incidence of scab disease, the following methods can be used to prevent. First, choose disease-resistant varieties. From the perspective of production practices, the varieties with better disease resistance include Yushu No.1, Luyin No.1, Qishao No.1, Chunshu No.1, Taishan No.1, Baifeng and Wulibai. Second, implement rotations. Firstly, it is necessary to carry out more than two years of rotation on the fields that have caused scab disease. Second is to improve the water conservancy facilities in Daejeon, ensure timely irrigation during the tuber period, and maintain wet management in the fields. Third, choose acidic soils for planting. Third, apply organic fertilizers. In the field of residual soil bacteria, we must adhere to the application of organic fertilizers, biological organic fertilizers, and can better inhibit soil-borne pathogens. Fourth, conduct chemical control. 1 The washed potato can be soaked for 2 hours in 0.2% formalin (formaldehyde) solution, or soaked in a 0.1% hydroquinone (chemically pure) aqueous solution for 30 minutes, then removed and air-dried for sowing; 2 can be used in sick fields. 40% pentachloronitrobenzene powder for soil disinfection, 1.2-2 pounds per acre; 3 can be sprayed with 65% mancozeb WP 1000 times at the beginning of the disease, spraying once every 7-10 days , spray a total of 2-3 times. Ophthalmology Scanner,Ophthalmic Equipment,Eye Ultrasound Scanner,Ophthalmic Windows Based Scanner Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com