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Soybean Stem Canker Incited by Ascospores and Conidia of the Fungus Causing the Disease in the Southeastern United States. R. C. Ploetz, Visiting Assistant in Plant Pathology, University of Florida, North Florida Research and Education Center, Route 3, Box 4370, Quincy 32351. F. M. Shokes, Associate Professor of Plant Pathology, University of Florida, North Florida Research and Education Center, Route 3, Box 4370, Quincy 32351. Plant Dis. 69:990-992. Accepted for publication 3 May 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-990.

In artificial inoculation experiments, ascospores or conidia of the fungus causing soybean stem canker in the southeastern United States infected a resistant cultivar and three susceptible cultivars of soybean. Typical symptoms of the disease developed on inoculated plants of susceptible cultivars 5080 days after inoculation.

Keyword(s): Diaporthe phaseolorum var. caulivora, southern D. phaseolorum.