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Evaluation of Aegilops Species for Resistance to Wheat Powdery Mildew, Wheat Leaf Rust, Hessian Fly, and Greenbug. B. S. Gill, Department of Plant Pathology, Fort Hays Branch, Kansas State University, Manhattan 66506. H. C. Sharma, and W. J. Raupp, Department of Plant Pathology, L. E. Browder, J. H. Hatchett, USDA-ARS, and T. L. Harvey, Fort Hays Branch, Kansas State University, Manhattan 66506; J. G. Moseman, Plant Genetics and Germplasm Institute, USDA-ARS, Beltsville, MD 20705; and J. G. Waines, Department of Botany and Plant Sciences, University of California, Riverside 92521. Plant Dis. 69:314-316. Accepted for publication 26 September 1984. 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, 1985. DOI: 10.1094/PD-69-314.

Thirty-seven to 187 accessions of 1621 Aegilops species were evaluated for resistance to powdery mildew (Erysiphe graminis tritici), leaf rust (Puccinia recondita tritici), Hessian fly (Mayetiola destructor), and greenbug (Schizaphis graminum). A high frequency of resistance to powdery mildew, leaf rust, and Hessian fly occurred among the Aegilops species. The frequency of resistance to greenbug was low and limited mainly to species containing the S-, D-, and C-genomes. Multiple resistance to two pathogens and two insects was identified in one accession each of A. caudata, A. longissima, A. speltoides, and A. variabilis, and to two pathogens and Hessian fly in six Aegilops species.