Black Rot symptoms on Sweetpotato
Black Rot (fungus - Ceratocystis fimbriata): Circular, almost
black spots appear on sweetpotato roots. Affected and adjacent
areas have a bitter taste. Small, black lesions often completely
girdle underground stems. The causal organism fruits abundantly
in storage, which helps separate black rot from other storage
rots. Once the most important sweetpotato disease, black rot is
difficult to find today.
January, 1996
