Severity of Foliar Symptoms and Root and Crown Rot of Soybean Inoculated with Various Isolates and Inoculum Rates of Fusarium solani . L. E. Gray, USDA/ARS, Department of Plant Pathology, University of Illinois, Urbana 61801. L. A. Achen-bach, Department of Microbiology, Southern Illinois University, Carbondale 62901. Plant Dis. 80:1197-1199. Accepted for publication 10 July 1996. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1996. DOI: 10.1094/PD-80-1197.

Soybean plants (cvs. Spencer and Ripley) were grown in Cone-Tainers infested with different rates of sudden death syndrome (SDS) isolates of Fusarium solani. Soil inoculum rate significantly affected severity of root rot and percent leaflets of inoculated plants with SDS symptoms with isolate Mont-1. Leaf symptoms of SDS on Ripley were significantly less than on Spencer. When SDS isolate Cora-7 was used, only the soil inoculum rate was significant for percent leaflets with SDS symptoms and root rot severity. Nine SDS fungal isolates differed in the amount of root rot and severity of leaf symptoms that they produced on inoculated Spencer and Ripley plants.