Department of Plant Sciences, University of California, Davis, CA, USA. kbattenberg@ucdavis.edu.|Department of Entomology and Nematology, University of California, Davis, CA, USA.|Department of Entomology and Nematology, University of California, Davis, CA, USA.|Department of Plant Sciences, University of California, Davis, CA, USA.|Department of Plant Sciences, University of California, Davis, CA, USA.