Bacterial Leaf Spot of Gloxinia. J. B. Jones, Assistant Professor, IFAS, University of Florida, Agricultural Research and Education Center, Bradenton 34203. Arthur W. Engelhard, Professor of Plant Pathology, IFAS, University of Florida, Agricultural Research and Education Center, Bradenton 34203, and C. C. Powell, Associate Professor, Department of Plant Pathology, Ohio State University, Columbus 43210. Plant Dis. 68:438-440. Accepted for publication 21 December 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-438.

A nonfluorescent, aerobic, gram-negative bacterium was isolated from necrotic spots in leaves of gloxinia (Sinningia speciosa) seedlings. The organism induced a hypersensitive reaction in pepper and tobacco. Upon artificial inoculation, lesions that turned brown (similar to those in the field) were reproduced. On the basis of biochemical and physiological tests, the bacterium was identified as a Pseudomonas sp.