1. Hampton Roads Agricultural Research and Extension Center; Virginia Polytechnic Institute and State University; 1444 Diamond Springs Roads Virginia Beach Virginia 23455
2. Department of Plant Science and Landscape Architecture; University of Maryland; College Park Maryland 20742
3. Wye Research and Education Center; University of Maryland Extension; Queenstown Maryland 21658
4. Agricultural Research Service; United States Department of Agriculture; Poplarville Mississippi 39470
5. Department of Plant Pathology & Environmental Microbiology; The Pennsylvania State University; University Park Pennsylvania 16802