Sweetpotato with black rot symptoms (IMAGE) American Phytopathological Society Caption Sweetpotato with black rot symptoms caused by the fungus Ceratocystis fimbriata. Credit Camilo Parada-Rojas Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.