Project Number: 5358-21000-034-20
Project Type: Grant

Start Date: Sep 11, 2006
End Date: Sep 30, 2009

Objective:
1) Evaluate whether rootstocks alter winegrape fruit composition during ripening and at harvest compared with winegrapes grown on their own roots. 2) Test for interactions between winegrape variety (scion) and rootstock in terms of fruit composition.

Approach:
Conduct a field experiment with three winegrape varieties (Merlot, Syrah, Chardonnay) that are either grown on their own roots or grafted to six different rootstocks. Fruit samples will be collected weekly from veraison through harvest from each variety/rootstock combination, weighed and analyzed for soluble solids, pH, titratable acidity, and color using standard laboratory practices. Documents Grant with Washington State University.