Pseudomonas syringae pv. syringae and Bacterial Brown Spot of Snap Bean: A Study of Epiphytic Phytopathogenic Bacteria and Associated Disease. Susan S. Hirano, Department of Plant Pathology, University of Wisconsin, Madison. Douglas 1. Rouse Department of Plant Pathology, University of Wisconsin, Madison; Murray K. Clayton Department of Plant Pathology and Statistics, University of Wisconsin, Madison; Christen D. Upper USDA Agricultural Research Service and Department of Plant Pathology, University of Wisconsin, Madison. Plant Dis. 79:1086-1093. Copyright 1995 The American Phytopathological Society. DOI: 10.1094/PD-79-1085.