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Reduction of Ozone-Sensitivity of Pinto Bean by Bean Common Mosaic Virus. D. D. Davis, Assistant Professor, Department of Plant Pathology and Center for Air Environment Studies, The Pennsylvania State University, University Park 16802; S. H. Smith, Associate Professor, Department of Plant Pathology, The Pennsylvania State University, University Park 16802. Phytopathology 64:383-385. Accepted for publication 1 October 1973. DOI: 10.1094/Phyto-64-383.

Bean common mosaic virus infection reduced the sensitivity of pinto bean to ozone (O₃) damage. Immature primary leaves inoculated with the virus 5 days prior to exposure with 25 µl O₃/liter of air for 4 h showed less O₃ injury than the noninfected control plants. Protection was influenced by the initial inoculum dilution and by length of time between inoculation and exposure to O₃.