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Grape Varieties Colorado State University Cooperative Extension Tri River Area Mesa Delta Montrose and Ouray Counties.
Although there are many species of grapevine throughout the world, and as many varieties of each species, almost all grapes produced for wine, juice, jams, raisins, or table use are either of European or North American origin.
Agrobacterium tumefaciens that infects more than 2,000 species of plants. Crown gall of grape is a major problem in cold climate regions. Wounds are necessary for infection to occur. Observations suggest that freeze injury wounds are highly conducive to infection.
Maybe the first grape that you encountered was a rich, blue-black Concord, presented as sweet, squishy jelly in a deliciously gooey peanut butter-and-jelly sandwich. Later, you probably broadened your repertoire with chewy, wrinkly raisins; chilled grape juice; and fresh grapesplump and crisp.
GRAPE (Vitis vinifera White Riesling, Chardonnay, Pinot Noir, Cabernet Franc) J. W. Travis, N. O. Halbrendt, Botrytis bunch rot; Botrytis cinerea B. Lehman, B. Hed & B. Jarjour Ripe rot; Colletotrichum sp.
Vineyards in Ontario, Canada are taking a $2-million hit each year from a bacterial disease called crown gall ... and the situation is getting worse. But new biological control techniques may soon put an end to its reign.
1 Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación La Platina, Casilla 33/3, Santiago, Chile. E-mail: nhewston@inia.cl * Autor para correspondencia. Recibido: 18 de mayo de 2006.
Laboratory experiments show that an extract of the skin of muscadine grapes can inhibit growth of prostate cancer cells in the laboratory. Investigators also show that muscadine grape skin extract does not contain significant amounts of resveratrol.
Dihydroflavonol reductase (DFR) is a key enzyme involved in anthocyanin biosynthesis and proanthocyanidin synthesis in grape. DFR catalyses the reduction of dihydroflavonols to leucoanthocyanidins in the anthocyanin pathway.