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Creator:: Sugar, David and Lombard, Porter
Abstract:: The 18 winegrape varieties in this trial were in fifth leaf in 1994. Vines were pruned in February to either a Scott Henry (4 arms on a vertical trellis using two fruiting wires 12 inches apart at 30 and 42 inch height) or a guyot (a double arm on a...
Resource Type:: Technical Report

Creator:: Sugar, David and Lombard, Porter
Abstract:: Four year old vines of 18 varieties were cane pruned, trained to a Scott Henry, thinned before veraison, and harvested in October and November 1993. Two of the varieties, Chardonnay and Cabernet Sauvignon, were used as standards. Only four varieties were spur pruned to reduce cropping or cluster size: Dolcetto,...
Resource Type:: Technical Report

Creator:: VanBuskirk, Philip
Abstract:: During the last two years thrips have been suspected of causing shoot damage in the form of reduced leaf size and stunted vine growth in one vineyard in the Cave Junction area of Southern Oregon. While there can be several problems that can cause this symptom in grapes, it was...
Resource Type:: Technical Report

Creator:: Daeschel, Mark A., Bower, Cynthia, and Watson, Barney
Abstract:: Nisin, bacteriocin produced by Lactococcus lactis, Nisin may have the potential to replace (or reduce) sulfiting agents traditionally added to wines to prevent the growth of spoilage lactic acid bacteria. This may be valuable since sulfites are believed to cause toxic responses in sensitive individuals. As a result, the U.S....
Resource Type:: Technical Report

Creator:: Watson, Barney and Price, Steve
Abstract:: The new varietal trial at SOES was monitored during the growing season and during ripening by David Sugar and Porter Lombard (see Winegrape Variety Trial in Southern Oregon). The 1993 vintage was a late ripening season and not all the varieties developed sufficient maturity for experimental wine production. Tempranillo, Viognier,...
Resource Type:: Technical Report

Creator:: Watson, Barney and Price, Steve
Abstract:: Oregon Pinot noir wines differ greatly in their color and phenolic profiles and this variability is due to both vineyard and to fermentation management practices. We have observed that Pinot noir fruit composition can vary significantly with vintage, with degree of maturity, with yields, with trellis systems, and with the...
Resource Type:: Technical Report

Creator:: Price, Steve and Watson, Barney
Abstract:: In experiments in grape skin light transmission in 1991, we found that quercetin (a phenolic compound found in many plants) accumulates in sun exposed grape skin. The accumulation of quercetin in grape skins appeared to be a protective response to solar radiation and we were able to show that quercetin...
Resource Type:: Technical Report

Creator:: Price, Steve
Abstract:: Minimal pruning continues to look like a production system worthy of consideration in small scale commercial trials. In 1993, in a trial on Chardonnay at Woodhall vineyard, minimal pruning was compared to standard cane pruned vines on a vertical trellis. This was the second year of the trial.
Resource Type:: Technical Report

Creator:: VanBuskirk, Philip
Abstract:: For over 13 years there has been an Area Horticultural Extension Agent available to assist winegrape growers in Jackson and Josephine Counties with production problems by conducting educational programs and applied research projects. While the salary for this position is paid by Oregon State University Extension, support funds which pay...
Resource Type:: Technical Report

Creator:: Dumont, Ann, Watson, Barney, and McDaniel, Mina
Abstract:: Riesling, Chardonnay, and Pinot noir wines from the 1992 vintage were fermented with several different commercial yeast strains. Differences were observed in fermentation rates, wine composition, and aroma and flavor. Preliminary results were reported on in the OSU Wine Grape Research Progress Reports, 1992-1993, Special Report 929, June 1993, OSU...
Resource Type:: Technical Report

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