1. Department of Horticultural Science, North Carolina State University, 2712 Founders Drive, Campus Box 7212 Raleigh, NC 27607, USA
2. Food and Resource Economics Department and Mid-Florida Research and Education Center, University of Florida, 2725 S. Binion Road, Apopka, FL 32703, USA
3. Food and Resource Economics Department, University of Florida, PO Box 110240, Gainesville, FL 32611, USA