1. Department of Horticulture, Oregon State University, Corvallis, OR 97331
2. Southern Oregon Research and Extension Center, Oregon State University, Central Point, OR 97502
3. Oregon State University Extension Service, Umatilla County, Milton-Freewater, OR 97862
4. Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720
5. Department of Plant Pathology, U.S. Department of Agriculture Agricultural Research Service, University of California, Davis, CA 95616
6. Department of Entomology and Nematology, University of California, Davis, CA 95616