Evaluation of Radish Cultivars for Resistance to Scab Caused by Streptomyces scabies. D. R. Levick, Graduate Research Assistant, Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824. C. T. Stephens, Assistant Professor, and M. L. Lacy, Professor, Department of Botany and Plant Pathology, Michigan State University, East Lansing 48824. Plant Dis. 67:60-62. Accepted for publication 28 May 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-60.

Eighty radish cultivars from the United States and Europe were evaluated in two field trials for resistance to radish scab caused by Streptomyces scabies. White elongate (icicle) cultivars showed consistently less scab than red globe cultivars. A European cultivar, Sar Katra, was the only red globe cultivar exhibiting significantly greater tolerance to scab than an American standard cultivar, Scarlet Knight. Horticultural characteristics and lack of resistance to Fusarium yellows, however, make it unsuitable for use in this country.