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Platyspora pentamera, a Pathogen of Wheat. R. M. Hosford, Jr., Associate Professor, Department of Plant Pathology, North Dakota State University, Fargo 58102; Phytopathology 65:499-500. DOI: 10.1094/Phyto-65-499.

Platyspora pentamera caused severe leaf spotting on some wheats and moderate spotting on Caribou rye after being on the leaves in wet periods of 48 - 72 hours. After wet periods of 24 hours, it caused slight to moderate spotting on some wheats. After wet periods of 6 - 12 hours, it caused no spotting on any of the Gramineae tested. In numerous samples from many wheat regions P. pentamera was found only once reproducing on spring wheat in North Dakota and once on winter wheat in Utah.