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Yield and quality of Vitis vinifera wine grape cultivars in Arkansas AFR 33(6):3 1984 R. K. Striegler and J. R. Morris THE PARAMETERS most often used to determine optimum harvest time for wine grapes in Arkansas are percent soluble solids and percent acidity.
Vines of the genus Vitis are the native host of the grape berry moth, Endopiza viteana Clemens (Lepidoptera: Tortricidae)and are found in unmanaged habitats throughout eastern North America. In a two-year study, the level of infestation by E.
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The grape has a long and complex history, dating back to its wild Near Eastern progenitor V. sylvestris. They were probably domesticated by 4000 B.C. Along with domestication came a single mutation-induced transition from dioecy to perfect flowers.
Phylloxera populations started from very low densities each spring, they increased exponentially and peaked during mid-summer, and then declined from mid- to late-summer. A second population peak was observed in the fall.