(Wines&Vines) - Information gleaned from a “crop forcing” vineyard trial in Fresno shows good promise for improving winegrape quality from the San Joaquin Valley and other warm climates by managing vines to shift the grape-ripening period from hot summer months to cooler months later in the growing season. At the Aug. 14 Fresno State Grape Day presented by the California State University, Fresno, Department of Viticulture and Enology, CSUF viticulture professor Dr. Sanliang Gu provided an update about a crop-forcing trial in a Cabernet Sauvignon block of the campus vineyard.