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Ecology and Epidemiology

Relation of Relative Humidity to the Invasion of Rough Rice by Aspergillus parasiticus. C. M. Christensen, Professor Emeritus, Department of Plant Pathology, University of Minnesota, St. Paul 55108; C. J. Mirocha, Professor, Department of Plant Pathology, University of Minnesota, St. Paul 55108. Phytopathology 66:204-205. DOI: 10.1094/Phyto-66-204.

Rough rice was inoculated heavily with spores of Aspergillus parasiticus and stored at relative humidities (RH) of 75, 80, and 85%, at 25 C. At zero time and after 32 and 72 days samples were shaken for 1 minute in 1% NaOCl and plated on agar; at zero time 57% of the “surface disinfected” kernels yielded A. parasiticus, and the percentage decreased with increasing time at all three RH.