1. Environmental Studies University of California Santa Cruz 1156 Hight Street Santa Cruz California 95064 USA
2. University of California Agriculture and National Resources Research and Extension Centers Davis California USA
3. Department of Plant Sciences University of California Davis Davis California USA
4. Horticulture Blacksburg Virginia Polytechnic Institute and State University Blacksburg Virginia USA
5. A&L Biologicals Agroecology Research Services Centre London Ontario Canada
6. Plant Sciences Knoxville University of Tennessee Knoxville Knoxville Tennessee USA
7. USDA Agricultural Research Service Horticultural Research Laboratory Fort Pierce Florida USA
8. Agriculture and Resource Economics Davis University of California Davis Davis CaliforniaUSA
9. USDA Agricultural Research Service Tree Fruit Research Laboratory Wenatchee Washington USA