1. USDA-Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center , 9611 South Riverbend Avenue, Parlier, CA 93648 , USA
2. Agricultural and Environmental Chemistry Graduate Group, Department of Environmental Toxicology, University of California at Davis , 4117 Meyer Hall, Davis, CA, 95616 , USA
3. USDA-Agricultural Research Service, Appalachian Fruit Research Station , 2217 Wiltshire Road, Kearneysville, WV 25430 , USA
4. Horticulture and Agronomy Graduate Group, University of California at Davis , 1 Shields Avenue, Davis, CA 95616 , USA