What happened to sweet potato crack?

1, because sweet potato grows fast under the influence of good water and fertilizer conditions, which leads to uneven inside and outside and cracking; The weather is dry and wet alternately during the potato fruiting period; During the planting period, the moisture was uneven. After a long drought, the potato meat suddenly grew very fast, and the skin grew slower than the inside and broke. The internal development is too fast, and the external development can't keep up, resulting in cracks and cracks.

2. Sweet potato varieties: the varieties with large potato pieces are heavy.

3, sweet potato infection: stem nematodes, endangering potato pieces, causing cracking. Sweet potato stem nematode is mainly transmitted through seed potato and soil, and both potato pieces and potato vines will suffer. If the potato is damaged, if it is spread by diseased seedlings, the skin generally has no obvious symptoms, but the inside turns brown and white; In case of soil transmission, nematodes invade the potato cuticle, and the cuticle of the affected area first fades, then turns green, slightly droops or has small cracks, and the subcutaneous tissue turns brown and shrinks, and then gradually develops into small cracks. With the growth of roots, nematodes damage from all sides to the center, forming chaff rot inside, forming large cracks and dark brown halo or water stains in the stratum corneum.