Daniel L. Schellenberg¹, Maria M. Alsina¹, Saiful Muhammad², Jennifer M. Jenkins¹, Carolina A. Almanza¹, Christine M. Stockert¹, Blake L. Sanden³, Patrick H. Brown² and David R. Smart¹, (1)Viticulture and Enology, University of California, Davis, CA, (2)Plant Sciences, University of California, Davis, CA, (3)Kern County Cooperative Extension, Univesity of California, Bakersfield, CA