Research Results
Click a title below to view a research summary or narrow your search by entering a specific search term or topic. You can find research summaries keyword, funding year, primary investigator or category using the search boxes at right. Project summaries are available for every year since 1991.
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Impact of Fungicide Use on Wine Quality
The purpose of this continuing research project was to investigate…
Improving nitrogen fertilizer efficiency in winegrapes
This was a four-year study on the effects of N fertilizer timing…
Influence of rootstock and vine spacing on root distribution, vine growth
Root profile mapping of Cabernet Sauvignon on AxR, 110R and St.…
Interaction of commercial wine yeasts and malolacric bacteria
Twenty-nine strains of malolacric bacteria and forty-three strains…
AN APPRAISAL OF LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY FOR THE ANALYSIS AND TRACKING OF WINE AND GRAPE COMPONENTS
Objectives and Results: Our initial assessment was that this…
Meristem tip culturing for the elimination grapevine viruses
Young grapevines have been successfully propagated from virus…
Minimizing Fertilizer Inputs for Variegated Leafhopper Management in Grapes
This research investigated the relationship between host plant…
New technology for determining vine water status and controlling vineyard
We confirmed that ultrasonic acoustic emissions occur in field-grown…
Influence of nitrogen fertilization and other vineyard cultural practices on the
Sauvignon blanc and Chardonnay grapevines grown at the North…
Influence of Potassium Deficiency and Temporary Potassium Deficiency on Nitrogen Metabolism in Leaves and Berries of Wine Grapes
During the 1991 season work was conducted to develop a procedure…
Production of Antisera to Grapevine Viruses
A good supply of antisera to two isolates (type II and type III)…
Reducing Bitterness in Wines
As reported previously (Noble, final report, AVF 91), astringency…
Shoot positioning as a means of improving fruit composition, wine quality
Two replicated shoot positioning field trials were conducted…
Soil Pest Profile for Grape Rootstocks
At this time we can present a ranking of sixteen rootstocks and…
Spiders as Beneficials in Grape Agro-ecosystems
Spiders represent an entirely predacious group of organisms whose…
Spread and Control of Biotype B Phylloxera
Summary From the 1990-1991 Report: Known biotype B sites are…
Determination of long term normal storage effects on urea and ethyl carbamate in wine.
The prediction of the changes in ethyl carbamate are directly…
Factors Affecting Sugar Utilization and Rate of Fermentation During Vinification
Adenine supplementation stimulated fermentation rate in Montrachet…
The Regulation of Fruit Growth, Fruit Composition, and Wine Composition by Water Management
This summary will constitute a brief overview of what we have…
Trellises for Wine Grape Canopy Management in the San Joaquin Valley
A wine grape trellis trial was designed and planted in 1986 at…
Use of Prune Refuges and Cultural Practices for Enhancing the Biological Control of the Grape Leafhopper
1. Impact of Prune refuges. Prune refuge management. Results…
Investigation of pattern of utilization of nitrogen compounds and urea
A field experiment, fertilized at seven different nitrogen levels…
Vineyard canopy management practices for improving grapevine
The main conclusions from a four-year study of trellising, row…
Volatile Sulfur Compounds: Incidence and factors affecting their formation in Californian Wines.
Research Accomplishments: As previously suggested, nitrogen-deficient…
Water Conservation in Wine Grape Production
An infrared thermometer (IRT) was used to schedule irrigation…
WATER REQUIREMENTS DURING AND AFTER VINEYARD ESTABLISHMENT FOR CHARDONNAY GRAPEVINES GROWN IN THE CARNEROS DISTRICT
A study was conducted to determine the water use or vineyard…
Winemaking Without Sulfur Dioxide
Spoilage organisms: Zygosaccharomvces and Kloeckera, whose presence…
