Control measures of black shank disease of potato

(prevention and control measures) (1) carry out quarantine and strictly prohibit the transfer of seed potatoes from disease areas to prevent expansion and spread. (2) selecting disease-resistant and high-yield varieties suitable for the local area to reduce the damage. (3) select and retain disease-free seed potatoes. In the south, the seed was sown in autumn, and the moderate small tuber was selected directly as the seed potato; the disease-free seed field was established in the northern potato area, and the whole potato was sown in the seriously diseased area to avoid cutting knife infection. Seedlings or disease-free stem cuttings can also be used to plant disease-free seed potatoes to reduce the source of primary infection. (4) choose sandy loam and high dry land for planting, fine soil preparation, timely drainage and irrigation, reasonable fertilization to ensure plant health, enhance disease resistance and slow down the disease. Timely removal of diseased plants, strict elimination of diseased potatoes in the process of collection, selection, transportation and storage to reduce the source of infection. (5) using agricultural streptomycin or copper sulfate solution to disinfect seed potato, or drying before planting to make seed potato cork, which can control bacterial infection.