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Growth of Pseudomonas glycinea on the Surface of Soybean Leaves. T. W. Mew, Junior Scientist, Department of Plant Pathology, University of Minnesota, St. Paul 55101; B. W. Kennedy, Associate Professor, Department of Plant Pathology, University of Minnesota, St. Paul 55101. Phytopathology 61:715-716. Accepted for publication 26 January 1971. DOI: 10.1094/Phyto-61-715.

Each of three pathogenic races of Pseudomonas glycinea were sprayed on leaves of three soybean cultivars in the greenhouse and assays were made of bacterial populations on symptomless leaves at intervals up to 240 hr. On susceptible leaves, bacteria increased by about 1,000-fold within 1-2 weeks. Populations were unchanged or declined on leaf surfaces of resistant cultivars. On leaf surfaces of plants intermediate in susceptibility, population increased during the 1st week, but declined during the 2nd week.