A survey of costs of various techniques to control bird damages to grapes will be conducted this fall by Oregon State University in a project funded by the Oregon Wine Advisory Board. Costs of equipment, materials, labor, maintenance and interest on loans will be compiled for a variety of control...
The following abstracts are from recent publications and presentations by Oregon State University researchers and graduate students working in viticulture and enology. For more information or reprints contact the authors at OSU.
For the past three years we have been bringing rootstocks into Oregon for inclusion into the OSU Grapevine Mother Block at the Lewis-Brown Farm east of Corvallis. Most of the material has come from the Foundation Plant Materials Service (FPMS) at Davis. The main purpose of the Mother Block is...
In 1994-95, the Oregon Wine Advisory Board supported a cooperative study entitled "Crown gall and phylloxera in Oregon grape vines: Biology and treatment of planting stock with hot water dips" with Bernadine Strik and Marilyn Canfield (Larry Moore) as co-principal investigators. We will report our findings on hot water dips...
Develop and publish literature to provide up-to-date information on specific topics zDevelop grape grower and County Extension Agent training sessions and short courses zResearch phyiloxera biology in Oregon
There are basically two types of grafting, bench grafting and field grafting. Worldwide the main reasons for bench grafting vines are: a) to obtain vines of the desired fruiting variety on roots resistant to phylloxera or nematodes, or b) to obtain vines on roots tolerant to certain soil conditions such...
This edition contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Dr. Elizabeth Tomasino, OSU associate professor, and Quynh Phan, OSU doctoral candidate, open the newsletter with an article on Pinot noir wine lipid composition....
Our latest edition of the OWRI Technical Newsletter contains research updates, the latest Extension resources, and a comprehensive list of publications outlining research conducted by members of the Oregon Wine Research Institute at Oregon State University. Dr. Patty Skinkis, Viticulture Extension Specialist & Associate Professor, OSU opens the newsletter with...
This edition contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Drs. Alexander Levin and Achala KC, both assistant professors at OSU-Southern Oregon Research and Extension Center (SOREC), along with Cody Copp, graduate research assistant,...
This edition contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Dr. Patty Skinkis, OSU Viticulture Extension Specialist and Professor, opens the newsletter with an article on canopy yield management. Dr. James Osborne, OSU Enology...
This issue is packed with new information from various research trials conducted here in Oregon, whether it is from vineyard plots, the wine lab, or the growth chamber, results are likely to have impact on vineyard and winery production here in Oregon. James Osborne, Enology Extension Specialist, opens this month’s...
Welcome to the March 2011 Viticulture & Enology Newsletter! We have a number of great articles from members of our team to keep you informed. Marcus Buchanan provides an update on the mealybug trapping efforts that have been in place in southern Oregon’s winegrape regions since 2009. Jay Pscheidt writes...
Welcome to the spring edition of the OWRI Technical Newsletter. This edition showcases several articles and resources that will help you to prepare for the 2013 season. Dr. James Osborne, OSU Enology Extension Specialist, opens this edition with a timely article about Brettanomyces and winemaking. You will also find an...
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....
For over 14 years there has been a 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 winch pay...
For over 14 years there has been a 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...
Objectives:
1. Evaluate canopy management options available to Oregon growers including trellising and pruning for their effects on yield and grape composition.
2. Investigate the relationships between vine growth, cluster environment cluster morphology, and grape composition.
3. Develop techniques that improve the capabilities of Oregon winegrape growers to maximize wine...
This study was initiated in its original form in 1982 with the Yamhill Soil and Water Conservation District and the McMinnville Field Office of the USDA-Soil Conservation Service. The Soils Department, Oregon State University, was one of several cooperators, in part funded by The Wine Advisory Board.
In 1984 and...
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...
A research trial was started in 1987 at Woodhall III Vineyard in Alpine to analyze the changes in composition which occur during ripening of Pinot noir and to determine their effect on wine composition and quality. This study developed in response to industry experience and our own problems with trying...
Five replicated rootstock trials established in Oregon's three main viticultural regions were evaluated for the effect of rootstock on Pinot noir performance. All the trials except Alpine included the following seven rootstocks: ungrafted Pinot noir, 3309 Couderc, 101-14 Millardet et De Grasset, 44-53 Malegue, 420 A Millardet et De Grasset,...
The planting operation is one of the most significant performed by the viticulturist, affecting as it does the future productivity and quality of the vineyard. Not only are decisions as to row and vine spacing of importance, but the most significant of all is the nature of the grapevines planted....
1. To provide technical services and consultation for solving commercial winemaking problems. 2. To develop applied workshops and technical seminars for the continuing education and professional development of Oregon wine industry personnel. 3. To apply research results to commercial wine production to improve wine stability and quality. The Oregon wine...
Malolactic fermentations are important in the production of quality table wines in cool climate winegrowing areas world-wide. The fermentation is encouraged to lower the acidity by converting malic to lactic acid, to increase aroma and flavor complexity, and to increase biological stability (1,2,3). Traditionally malolactic fermentations occur sporadically from growth...
The report below and displays in the lobby summarize the first-year activities of the Oregon Vineyard Soil and Nutrition Initiative. This work has laid the foundations for OVID, the Oregon Vineyard Database, which will fill the second year of OVSNI and is discussed in the final sections.
In 1984, Oregon State University's Department of Agricultural and Resource Economics was again asked to make a winegrape acreage survey in Oregon. Winegrape acreage is currently increasing dramatically and the Wine Advisory Board is interested in keeping track of these changes. In 1981 and 1982, the Department made surveys of...
Oregon State University's Department of Agricultural and Resource Economics conducted a winegrape acreage survey in Oregon for the 1986 production year. Winegrape acreage has been increasing dramatically and the Wine Advisory Board (WAB) is interested in keeping track of these changes. In 1981, 1982, and 1984 the Department made surveys...
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...
The following is a report on a limited survey we conducted testing for the presence of Mesurol (Methiocarb) in Oregon wines. This study was undertaken as a result of recent publicity (resulting from testing in British Columbia) concerning the finding of Methiocarb residues in some wines, including Oregon wines; and...
This edition contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Dr. Bob Martin, Research Plant Pathologist (Virology), USDA, opens the newsletter with a research update on grapevine red blotch disease that provides growers with...
This edition contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Dr. Elizabeth Tomasino, OSU Associate Professor, opens the newsletter with an article on the influence of two compounds on Pinot noir aroma. Drs. Laurent...
Our latest edition of the OWRI Technical Newsletter contains research updates and a comprehensive list of publications summarizing research conducted by faculty of the Oregon Wine Research Institute at Oregon State University. Dr. R. Paul Schreiner, USDA-ARS Research Plant Physiologist, opens the newsletter with a research update on Pinot noir...
Our latest edition of the OWRI Technical Newsletter contains helpful Extension information, updates and research discoveries. Dr. Jay Pscheidt, Professor and Extension Plant Pathologist, OSU, opens the newsletter with an article about the potential effects of climate change on powdery mildew; a timely topic for the 2016 growing season. Dr....
This newsletter comes at the advent of bloom and fruit set in this 2011 season. To provide information on timely topics, Patty Skinkis provides an article on early season leaf removal and how it may help reduce disease infection. Inga Zasada provides information on plant parasitic nematodes to help you...
Progress Reports for projects: Audio/Visual instruction of canopy management for wine grapes in Oregon, Utilize the northwest berry and grape information network to communicate to Oregon wine grape growers on-farm experimentation techniques (on-line/on-farm), and Publishing of the 2003 pest management guide for wine grapes.
Pinot noir research in Oregon is aimed at improving wine quality and production and at increasing the diversity of virus-free clonal material available to our wine industry. Numerous clones of Pinot noir have been identified in France where the cultivar is known for its wide range of genetic variability. Because...
Grape phylloxera (Daktulosphaira vitifoliae), a root-feeding aphid-like insect, is the most important pest of European winegrape vineyards worldwide. They cannot be controlled on infested vines which eventually die. There are currently no satisfactory chemical or biological control methods for this pest; its management throughout the world has been by planting...
Soil and vineyard vegetation management are tools that may be used to create stable growing conditions for the grapevine roots and to preserve soil fertility for high grape quality in future years. The use of cover crops is commonly practiced in viticultural areas where precipitation exceeds 600-700 min (24-28 in)...
The new varietal trial at the Southern Oregon Experiment Station was monitored during the growing season and during ripening by David Sugar and Porter Lombard. Most of the varieties in the trial ripened well this vintage compared to 1993 where not all of the varieties developed adequate maturity. Unusually warm...
Recently there has been publicity concerning the finding of Methiocarb residues in some wines, including wines from Oregon, Washington and New Zealand. This article reviews the current (and potential future?) "status" of the use of Mesurol as a bird repellent on grapes in light of recent Federal legislation and of...
For several years thrips have been suspected of causing shoot damage in the form of reduced leaf size and stunted vine growth in a vineyard in the Cave Junction area of Southern Oregon. While the symptoms described above can be caused by several problems, it was decided in 1992 to...
Since phylloxera's discovery in a commercial vineyard in August of 1990, nine infestations have been verified in Oregon. With over 95% of Oregon's vineyards planted with ownrooted, Vitis vinifera, non-resistant vines, understanding the insect's biology under our conditions has become important for determining management strategies that minimize rate of spread....
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,...
Objectives: - Evaluate existing netting systems developed for use as bird control in horticultural crops, - Provide protection from birds for the Lewis-Brown Horticultural Farm yield trials vineyard, and - Establish a field trial to evaluate netting systems and provide a location for growers to observe the results.
To characterize the cultural aspects, maturation, production, and wine quality of several untested Italian, French, and Spanish wine cultivars in southern Oregon.
An industry panel tasting of wine from the 1987 Pinot noir maturity trials (see previous article by Watson et al this issue) was conducted at OSU in April, 1988. Thirteen winemakers participated in the half-day tasting which involved both the description of the aroma and flavor of the wines and...