Grapevine variety selection is becoming an increasingly complex decision, considering potential marketability, yield, quality, environmental adaptability, ripening time, pest and disease resistance, and other traits. Importation and grape breeding programs have increased the diversity of grape varieties available to growers in the USA, but reliable descriptive information, and quality and agronomic data, may be limited or spread among many websites. The aim of this website is to compile science-based information on wine, table, and raisin grape varieties and provide search tools to help growers find varieties that meet their needs.
Arinto is a high yielding Portuguese white wine grape variety that is known for its quality varietal wines and contribution to blends. It retains its acidity well, even when grown in warm to hot climates. Arinto is resistant to water deficits in the warmer months, but due to its compact clusters can be susceptible to bunch rot – though in the Parlier (Fresno County, California) trials it was observed that Arinto did not rot as would be expected from such tight clusters.Read more
Autumn King is a late-season white-skinned table grape (Vitis vinifera L.), typically ripening in late October in the San Joaquin Valley. It is notable for its very large berries (>9 g natural berry weight), and high yield potential. Head-training and cane-pruning is recommended. Preliminary reports suggested Autumn King vineyards will yield 700-800 22 lb boxes of fruit per acre each year (Hashim-Buckey and Ramming), but more recently it was suggested the variety could produce 1,800 19 lb boxes/acre annually (Fidelibus et al., 2018). The difference in yield estimates depends, in part, on berry size, as original yield estimates were based on natural berry size of approximately 10 g, but optimal cultural practices can substantially increase berry size. Autumn King is patented and licensed exclusively to the California Table Grape Commission.Read more