Received for publication September 25, 1976. Florida Agricultural Experiment Station Journal Series No. 6105. The authors thank M. A. Maloney for assistance with statistical analyses. This research was financed under CSRS grants: 216-15-01, 316-15-72, 416-15-35, 516-15-07, and 616-15-15.
Senior author’s present address: Extension Horticulturist, University of Georgia, Athens, Georgia. Formerly Research Associate, Carver Research Foundation, Tuskegee Institute.
Professor of Plant Pathology, University of Florida, Agricultural Research and Education Center, Homestead, Florida.