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Rapid Laboratory Screening of Sugar Beet Cultivars for Resistance to Rhizoctonia solani. C. Lee Campbell, Graduate Research Assistant, Department of Botany and Plant Pathology, Colorado State University, Fort Collins 80523; Jack Altman, Professor, Department of Botany and Plant Pathology, Colorado State University, Fort Collins 80523. Phytopathology 66:1373-1374. Accepted for publication 20 April 1976. Copyright © 1976 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-66-1373.

In growth chamber tests at 26 C, resistance among sugar beet cultivars to seedling damping-off incited by Rhizoctonia solani was found to be an accurate index of the relative resistance of cultivars to Rhizoctonia root rot. This indication of relative root rot resistance can be obtained within 3 weeks using this technique which is more rapid and economical than traditional field tests.