Soybean Seed Quality of 16 Cultivars and Four Maturity Groups in Illinois. E. G. Jordan, Former USDA, APHIS Plant Pathologist and Former Assistant Professor, Department of Plant Pathology, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana 61801-4709. J. B. Manandhar, P. N. Thapliyal, and J. B. Sinclair. Former Graduate Research Assistant, Former Visiting Associate Professor, and Professor, Department of Plant Pathology, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave., Urbana 61801-4709.. Plant Dis. 72:64-67. Accepted for publication 24 June 1987. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0064.

Seeds of 16 soybean (Glycine max) cultivars of maturity groups II, III, IV, and V, harvested from 30 plots in Illinois from 1978 to 1981, were evaluated for seed quality. Seed quality was highest for group III and lowest for group II soybeans. Elf, group III, produced the highest quality while Wells, group II, produced the poorest quality seeds. The group III cultivars Will and Williams, group IV cultivars Cutler 71, Franklin, Kent, and Union, and group V cultivar Essex had very good seed quality. Wells had the highest percentage of seeds infected with Phomopsis spp., and Amsoy and Amsoy 71, group II, had the highest percentage of seeds infected with Cercospora kikuchii. Recovery of these two fungi was lowest from seeds of Elf and Essex. Beeson, group II, had the highest percentage of seeds infected with Macrophomina phaseolina, Nematospora coryli, and Penicillium spp.; Essex had the highest percentage of seeds infected with Alternaria, Chaetomium, Cladosporium, and Fusarium spp.

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