Erbaluce is an ancient Italian white wine variety suitable for a variety of wine styles, including sparkling, dry, and passito. It is considered vigorous and productive in Italy, where it is traditionally long-pruned and grown on a pergola. In a San Joaquin Valley trial where the vines were trained to bilateral cordons, spur-pruned, and supported with a two-wire T-trellis, the yields were low, but fruit and wine quality were high. Simulated mechanical pruning greatly increased yields without affecting soluble solids accumulation, so adequate yields should be attainable by adjusting pruning practices.
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Villard Blanc is a white French-American hybrid bunch grape that was released in 1937 by Seyve and Villard. Currently, it is frequently grown in eastern and southern states as a fresh-eating table grape or for blending in white wine for a light, neutral flavor. Vines have a semi upright growth habit and are vigorous and productive with large loose clusters that fully mature in late July to late September. While it is susceptible to black rot and Powdery mildew, it has some tolerance to Pierce’s disease, at least in the first 10 years of being grown.
Miss Blanc is a white French-American hybrid bunch grape that was released by Mississippi State University in 1982 by J.P Overcash, C.P. Hegwood Jr., and B.J. Stojanovic. It is grown for its usefulness as a mild flavored white wine that has been judged intermediate in quality. Vines are moderately vigorous and productive with medium to large clusters that fully mature in late July to mid-August. While it is susceptible to anthracnose and black rot, it has good tolerance to Pierce’s disease.
‘Blanc du Bois’ is a white hybrid grape cross developed by Dr. John A. Mortensen at the University of Florida’s Central Florida Research and Education Center (Leesburg, FL) in 1968. In Mortenson’s original release document, he indicated three descriptors of significance for ‘Blanc du Bois’: (1) early ripening; (2) grows well on its own roots (though rootstocks may be necessary on some soils and for nematodes); and of greatest significance, (3) resistance to Pierce’s disease. In addition, and also of major importance, ‘Blanc du Bois’ has very good wine making qualities. It was named in recognition of Emile DuBois, an immigrant from France to Florida, who planted >150 grape cultivars in the Tallahassee area and produced award-winning wines in his time. ‘Blanc du Bois’ is considered one of the best southeastern cultivars for premium wine due to its balanced flavor and resistances to both Pierce’s disease, phyllozera, and powdery mildew. It grows vigorously with a semi-erect growth pattern and produces medium-sized clusters with large berries. ‘Blanc du Bois’ ripens mid to late July in areas of Georgia west of Atlanta and will yield 1.8-4.5 metric tons (2-5 tons) per acre with good viticultural practices. It is grown throughout the Southeast but is most common in Florida, Georgia, Louisiana, and Texas. Though well adapted to the southeastern climate, it is still highly susceptible to anthracnose. The soluble solids content is on average lower than Vitis vinifera cultivars.