Field Evaluation of Corn Inbreds and Selections for Resistance to Exserohilum turcicum Race 2. W. L. Pedersen, Assistant Professor, Department of Plant Pathology, University of Illinois, Urbana 61801. J. M. Perkins, Assistant Plant Pathologist, Department of Plant Pathology, University of Illinois, Urbana 61801; J. A. Radtke, Northrup King Company, Mt. Joy, PA 17552; and R. J. Miller, Holden Foundation Seeds, Williamsburg, IA 52361. Plant Dis. 70:376-377. Accepted for publication 24 October 1985. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-376.

Ninety-eight corn inbreds and selections were evaluated for qualitative resistance (lesion type) to Exserohilum turcicum race 2 under field conditions in Iowa, Illinois, and Pennsylvania. Plots were inoculated with an indigenous isolate of E. turcicum obtained from susceptible lesions on inbreds with the Ht gene. Twelve lines had chlorotic-type resistant lesions at all locations; however, several lines were resistant at one or two locations and intermediate, susceptible, or segregating at the other locations.

Keyword(s): host-parasite interactions, northern corn leaf blight, Setosphaeria turcica, Zea mays.