By G. BI*, C. F. SCAGEL, L.H. FUCHIGAMI and R. P. REGAN Truck Crops Branch Experiment Station, Mississippi State University, Crystal Springs, MS 39059, USA USDA-ARS-Horticultural Crops Research Laboratory, Corvallis, OR 97331, USA Department of Horticulture, Oregon State University, Corvallis, OR 97330, USA North Willamette Research and Extension Center, Oregon State University, Aurora, OR 9700...