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Penicillium claviforme and Penicillium variabile: Pathogens of Stored Sugar Beets. W. M. Bugbee, Plant Pathologist, Agricultural Research Service, U.S. Department of Agriculture, and Adjunct Professor, Department of Plant Pathology, North Dakota State University, Fargo, ND 58102; Phytopathology 65:926-927. DOI: 10.1094/Phyto-65-926.

Penicillium claviforme and P. variabile were identified as pathogens of stored sugar beets. P. claviforme was more pathogenic than P. variabile, but less pathogenic than Phoma betae or Botrytis cinerea at 5 or 20 C. P. claviforme was more prevalent than P. variabile. The distinctive coremia of P. claviforme aided in identification, both in culture plates and storage piles.