Effect of Trellis Type and Canopy Location on Yield Components, Fruit Composition, Fruit Set, and Shoot Morphology in Pinot noir Grapevines 1996-1997

Five different trellis and training systems were compared in their effect on yield components, fruit\ud composition, fruit set, and shoot morphology in Pinot noir grapevines. The treatments were: upright\ud vertical, cane pruned (Guyot); upright vertical, spur pruned (Bi-lateral Cordon); Scott Henry, cane\ud pruned; Lyre, cane pruned; and Geneva Double Curtain (GDC), cane pruned. The GDC and the Scott\ud Henry had the highest yield, but were not significantly different from the Lyre or Bi-lateral Cordon. The\ud double curtain trellis systems had the most clusters per shoot. Vines trained to the GDC had the highest\ud cluster weight. The GDC and Scott Henry had the most berries per cluster. The single curtain trellis\ud systems had more shoots per square meter than the double curtain systems. There were no significant\ud differences in must soluble solids, pK or titratable acidity among the different trellis systems. The\ud double canopy trellis systems were also evaluated by canopy to determine differences within the vine.\ud There were no significant differences in yield components between double canopies within the vine. The\ud north facing curtain in both the GDC and the Lyre had longer mean shoot length. The north facing\ud curtain in the GDC also had higher percentage main shoot leaf area, while the south facing curtain had\ud higher percent lateral shoot leaf area