1. 1Department of Horticultural Sciences, Texas AgriLife Research & Extension Center, 1102 East FM 1294, Lubbock, TX 79403
2. 2Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Sciences Building, Knoxville, TN 37996
3. 3Department of Horticulture and Landscape Architecture, Washington State University, Mount Vernon NWREC, 16650 State Route 536, Mount Vernon, WA 98273
4. 4Department of Plant Pathology, Washington State University, Mount Vernon NWREC, 16650 State Route 536, Mount Vernon, WA 98273