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Development of a Medium for the Selective Isolation of Sclerotium rolfsii. P. A. Backman, Assistant Professor, Department of Botany and Microbiology, Auburn University Agricultural Experiment Station, Auburn, Alabama 36830; R. Rodriguez-Kabana, Associate Professor, Department of Botany and Microbiology, Auburn University Agricultural Experiment Station, Auburn, Alabama 36830. Phytopathology 66:234-236. Accepted for publication 20 August 1975. DOI: 10.1094/Phyto-66-234.

An agar medium for the selective isolation of Sclerotium rolfsii from contaminated field sclerotia and from organic matter is reported. Selectivity is based on tolerance and utilization of oxalate, with additional selection being contributed by the low pH of the medium, and by the addition of gallic acid.