There have been significant changes in personnel assignments in the OSU Viticulture program during the past year, resulting in shifts in assignments and responsibilities affecting both research and extension in viticulture. Some of these changes are temporary and the current Extension program in viticulture should be considered an interim program....
One of the most important decisions growers make is the choice of planting stock. The right variety and clone matched to the right site is a solid foundation for success. But choosing planting stock involves more than choosing the genetic make-up of the grape. Grapes are hosts to a large...
Cool weather during fruit initiation and bloom can cause wide yield fluctuations in Oregon vineyards. These fluctuations in clusters per vine, flowers per cluster, and berries per cluster make yield prediction difficult. Over- or underestimates of yield have caused problems in marketing grapes and viticultural decision making. Oregon State University...
In 1983, our research group took on the task of answering the question: What are the characteristics of available Pinot noir clones in Oregon? Our main resources in this effort were the OSU Mother Block and two cooperative clonal trials at Knudsen Erath (KE) and Five Mountain Vineyards( 5M). Information...
Introduction of new winegrape varieties and clones of important commercial varieties in Oregon. zEvaluation of vine and grape characteristics of selected varieties. zEvaluation of phylloxera resistant rootstocks.
The Oregon Foundation Seed & Plant Materials Project (FS&PMP) is charged with maintaining, increasing, and distributing early generation planting stock of grains, grasses, legumes, potatoes, grapes, and mint to Oregon growers. Early generation seed and plant materials are released to Foundation seed programs for the production of the Foundation class...
Phenolic compounds are key quality components of wine affecting sensory characteristics, wine color, and wine stability. Phenolics are responsible for much of the mouth flavor of wines affecting astringency, bitterness, and the "length" of the flavor impression on the palate. The color in both red and white wine is due...
Pinot noir is Oregon's most important wine grape variety, representing 38% of the state's total wine production. Oregon State University began importing Pinot noir clones from California and France in the 1970's to insure that Oregon growers had access to the full range of clonal types. Almost all of the...
We harvested the first significant crop from the Woodhall clonal trials in 1993. Early results from clonal trials can be misleading but there are differences between clones that are already quite apparent in some cases. Many of the clone types could be readily identified this season by plant growth habit...