How to control and prevent common potato diseases?

How to control and prevent common potato diseases? Please give guidance on the following common potato diseases: a, potato late blight 1, prevention: choose protective fungicides, such as Dasheng Fu (mancozeb suspension produced by Dow Yinong), essential (Bordeaux liquid). The key technical points of preventive agents are as follows: (1) the spray should be meticulous and sprayed to the whole plant, and imported auxiliaries should be added. (2) use it continuously for more than 2 times. 2, treatment: you can choose Swiss Syngenta's Figg, disinfectant alum, Bayer Silver Farley, BASF Kate and other medicaments. B, potato early blight 1, prevention: mancozeb (Dasheng rich), carbendazim, thiophanate methyl. 2. Treatment: Fuliku 3ml or 5ml spray with 30 jin of water. It is forbidden to use at seedling stage. C, potato black shank disease 1, knife disinfection. 2. Use agricultural streptomycin for seed dressing or add rice for seed soaking. 3. After occurrence: it must be 25g + 50ml plus 30jin of water. 4. Black shank is a seed-borne and soil-borne bacterial disease, and prevention is the key. Low temperature and freezing injury are the key factors after sowing. D, potato scab mainly affects the commodity, which is a bacterial disease, and the control method is the same as black shank. E, potato Verticillium wilt (early death) 1. Verticillium wilt is a soil-borne and seed-borne disease. 2. Seed soaking: Rimiaoqing 8 ml mixed with 16 jin of water, which is one of the key periods for the prevention and treatment of Verticillium wilt. 3. Qi Miao: spraying Ruimiaoqing 8 ml + Biou 15 ml with 30 jin of water, another critical period for the prevention and treatment of Verticillium wilt. Click to get more potato planting techniques click to get more vegetable planting techniques