The sweet potato production in hilly arid areas has many types of diseases in the soil due to repeated heavy cropping or operation for many years. The three major diseases of sweet potato are even more harmful and cause more losses. The damage caused by root rot and stem nematode disease is devastating and must be highly valued. In addition to cultivating, cropping, and selecting disease-resistant varieties, seedlings are soaked in the nursery stage, high-cutting seedlings are used, and high-temperature greenhouses are used to control black spot disease; when the seedlings are planted, medicinal agents such as Shennongdan and stem lines are used. Ling and other prevention of stem nematode disease; and do a good job in the prevention and control of underground pests (ground tigers, golden needles, cockroaches, cockroaches).
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