Traditionally, the source of seed potatoes in the main potato growing areas of Yunnan Province is mainly small or large potato chips after harvesting each year. When they are sown in the following year, they are cut into pieces, which can not guarantee the quality of the potato chips. When cutting, the artificial pathogens will be man-made. Spread open. Therefore, we must: (1) set aside some plots in potato planting fields as the source of seed potatoes in the coming year; (2) increase the planting density in the potato plots, and increase the planting density from 5000 to 7000 ponds/mu. A large number of tubers should be used for the purpose of planting whole potatoes with healthy seed potatoes. (3) Strengthen the cultivation and management of the planted potato fields, ensure that the soil is cultivated high, and cultivate the soil more than twice, so as to reduce the chance of contact between pathogens and tubers; (4) A chemical control is conducted between 2 weeks and 1 month before seed tuber harvesting; (5) If a bacterial disease is found in the seed potato field, the tuber within 2 meters in diameter cannot be used as seed tuber. Pay attention to the harvest: First harvest the healthy potato, and then treat the diseased potato.
Seed storage should be in a well-ventilated, low-light and dry place, separate from a large number of commercial potatoes to avoid the occurrence of diseases during storage.
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