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Additional Data on the Thermal Sensitivity of Selected Fungi Associated with Agaricus bisporus. P. J. Wuest, Associate Professor, Department of Plant Pathology, The Pennsylvania State University, 211 Buckhout Laboratory, University Park 16802; R. K. Moore, Former Graduate Assistant, Department of Plant Pathology, The Pennsylvania State University, 211 Buckhout Laboratory, University Park 16802, Present address: U.S. Army, Rocky Mt. Arsenal, Denver, Colorado 80240. Phytopathology 62:1470-1472. Accepted for publication 22 June 1972. DOI: 10.1094/Phyto-62-1470.

Treatment of mineral soil with aerated steam at 54.4 C for 15 min eliminated Dactylium dendroides, Geotrichum candidum, Mycogone perniciosa, Ostrachoderma sp., Trichoderma viride, and Verticillium malthousei that had been experimentally established for 17 days in axenic soil culture. Repeated experiments with T. viride and Ostrachoderma sp. yielded inconsistent data when treatment time was 15 min, although they were consistently eliminated with 30 min treatment.

Additional keywords: soil treatment, aerated steam, mushroom pathogens.