Photo 1. Large, sunken, circular spots on a sweetpotato storage root caused by black rot, Ceratocystis fimbriata.
Photo 2. As in Photo 1, sunken, circular spots on a sweetpotato storage root caused by black rot, Ceratocystis fimbriata. The white cottony growth of the fungus can be seen on some of the spots.
Ceratocystis fimbriata; the asexual state is Chalara species.
AUTHOR Grahame Jackson
Photo 1 Gerald Holmes, California Polytechnic State University at San Luis Obispo, Bugwood.org. Photo 2 Charles Averre, North Carolina State University. Bugwood.org. Photo 3 Compendium of SweetPotato Diseases (1988). American Phytopathological Society.
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
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