VIEW ARTICLE

Letter to the Editor

Estimated Relation Between Numbers of Urediniospores of Puccinia graminis f. sp. tritici and Rates of Occurrence of Virulence. J. F. Schafer, Cereal Rust Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Department of Plant Pathology, University of Minnesota, St. Paul 55108; A. P. Roelfs, Cereal Rust Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Department of Plant Pathology, University of Minnesota, St. Paul 55108. Phytopathology 75:749. Accepted for publication 6 May 1985. 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/Phyto-75-749.