Scurf on Sweet Potatoes (2024)

Dark spots on sweet potatoes

Sweet potatoes that develop dark spots may be infected with a fungal disease that may cover the entire skin surface. The injury is superficial, however, and does not affect eating quality. Prevent the problem by buying disease-free slips for planting. Scurf can persist for several years in garden soils that receive yearly manure applications.

Scurf on Sweet Potatoes (2024)
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