Plant Pathology in China, 1980. R. E. Ford, University of Illinois, Urbana. H. L. Bissonnette, J. G. Horsfall, R. L. Millar, D. Schlegel, B. G. Tweedy, and L. G. Weathers, University of Illinois, Urbana. Plant Dis. 65:706. . 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, 1981. DOI: 10.1094/PD-65-706.