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Postemergence Damping-off of Peanut Plants Caused by Pythium myriotylum. D. K. Bell, Associate Professor, University of Georgia College of Agriculture Experiment Stations, Coastal Plain Station, Tifton; N. A. Minton, Research Nematologist, Agricultural Research Service, U.S. Department of Agriculture, Tifton, Georgia 31794 Phytopathology 63:1544-1545. DOI: 10.1094/Phyto-63-1544.

Three isolates of Pythium myriotylum designated pod breakdown isolate (PBI), greenhouse isolate (GHI), and post emergence damping-off isolate (PEDI), were tested for pathogenicity and virulence to peanut seeds and seedlings. Percent emergence was less and postemergence damping-off was greater for PEDI than for the two other isolates indicating differences in virulence. Postemergence damping-off was the primary manifestation of the PEDI.