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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Baseline Levels of Smoke-related Volatiles and their Glycosidic Precursors in California Grapes and Wines
The increasing incidence of wildfires in grape growing regions of California and the West Coast has highlighted the need for enhanced understanding of the levels of volatile phenols and their non-volatile glycoside precursors that contribute to smoke taint off-flavors in grapes and wines.
Building community resilience, coordination, and collaboration for individual and regional red blotch disease management.
The goal of this project is to increase the adoption of grapevine red blotch disease (GRBD) management practices at the individual and regional scale. To accomplish the goal, this outreach project supported and empowered viticulture specialists with the educational resources and technical skills to advocate for adoption of practices within their organizations and when attempting collective action with neighboring vineyards.
Variable rate irrigation scheduling based on high-resolution short-wave infrared sensing and internet-of-things.
Vineyards face climate change, increasing temperatures, and drought affecting vine water status. Water deficit affects plant physiology and can ultimately decrease yield and grape quality when it is not well managed. Monitoring vine water status and irrigation can help growers better manage their vineyards.
Extension and Outreach through UC Davis Viticulture and Enology On the Road Events
By the end of the 2022-2023 funding cycle, we completed three of the four On the Road (OTR) educational events originally proposed in the 2022 AVF Extension and Outreach proposal (Tulare, Mendocino, and Lodi) plus the in-person program in Shasta County (twice postponed due to COVID circumstances).
LEVERAGING BERRY PHYSIOLOGY TO MITIGATE LATE-SEASON DEHYDRATION
Summary: Warm, dry conditions can exacerbate late-season berry shrivel, reducing yield and altering berry sensory properties. Late-season shrivel occurs when the berries undergo programmed cell death, and the water released from the ruptured cells is drawn from the fruit to the canopy by a water potential gradient.
CAN WATER-SAVING TRAITS REDUCE GRAPEVINE IRRIGATION DEMAND WITHOUT COMPROMISING YIELD AND QUALITY?
Climate change is expected to increase irrigation demand at the…
Sudden Vine Collapse
This project was planned to determine if co-infections of grapevine…
Furthering Elite Grape Rootstocks With Reduced Nematode Susceptibility
The long-time plantings of vineyards are continuously at risk…
Grape Powdery Mildew Reduction
SUMMARY Spray-Induced Silencing of Grape Powdery Mildew Genes…
Tropical Fruit Aroma in Wine
Summary The overall goal of this project is to produce Chardonnay…
Smoke Taint Sensory Interactions
Evaluate and select Pinot noir and Cabernet Sauvignon wines that…
Raman for Smoke Exposure
During the 2022-2023 funding cycle, we have finished the volatile…
Malolactic Fermentation Timing and Color
The malolactic fermentation (MLF) is a key process in the production…
Field Trials of Biocontrol for Grapevine Trunk Disease
Three bacterial isolates selected from previous AVF grants (2019-2332…
Baseline Smoke-Taint Volatiles and Glycosides
Summary The increasing incidence of wildfires in grape growing…
VRI Scheduling System
Summary: Vineyards face climate change, increasing temperatures,…
Reducing Late Season Berry Dehydration
Summary: Warm, dry conditions can exacerbate late-season berry…
Botrytis Bunch Rot: Who, Where, When, and What to Use
In the 2021 field season, eleven field sites from nine different…
Spray-Induced Silencing of Grape Powdery Mildew Genes to Reduce Powdery Mildew Growth
Powdery mildew is the dominant disease of grapevine. It infects…
Achieving Tropical Fruit Aroma in White Wines: From Winemaking to Consumer Acceptance
The overall goal of this project is to produce Chardonnay wines…
Rootstock Effects on Mature Pinot Noir Growth and Productivity Under Cool Climate, Dry-farmed Conditions
Vine growth, yield, and fruit composition of Pinot noir grafted…
Online Guide to Grapevine Varieties and Rootstocks in the United States
A webpage called Grape Varieties in the USA (https://grapevarieties.info)…
Baseline Levels of Smoke-related Volatiles and their Glycosidic Precursors in California Grapes and Wines
The increasing incidence of wildfires in grape growing regions…
Developing an Efficient DNA-free, Non-transgenic Genome Editing Methodology in Grapevine
Genome editing is a plant breeding innovation that allows rapid…
On-the-go Mapping of Grape Composition in the Field Through Hyperspectral Machine-Vision
This project reports the first six months of activity for this…
Extension and Outreach through UC Davis Viticulture and Enology On the Road Events
By the end of the 2020-2021 funding cycle, we completed three…
The Role of Rootstocks and Single and Mixed Infections of Grapevine Leafroll Associated Virus-3 and Grapevine Virus A in Sudden Vine Collapse
Eighteen blocks in 12 vineyards, located in five different counties,…
Assessment of the Variability in Soil Health Indicators and Incorporating Healthy Soil Management Practices into the Context of Napa Valley Terroirs
Adoption of sustainable soil management practices is becoming…
Controlling Grapevine Trunk Diseases in California
A total of 20 vineyards from 10 counties across California were…
Physiological Responses of Grapevine to Salt Stress and Remediation by CaSO4 Amendments in Central Valley of California
Proper management of salt accumulation in soils is crucial to…
Exploring the Etiology of Berry Shrivel Ripening Disorder: Considerations of Biotic and Abiotic Factors
While there are several disorders affecting grapevine berry development,…
Spray-Induced Silencing of Grape Powdery Mildew Genes to Reduce Powdery Mildew Growth
Powdery mildews are widespread pathogens of grapevine that are…
Evaluating Grape Rootstocks for Nematode Susceptibility
In California grape production is one of the perennial high-value…
Revisiting Tartrate Stability
Despite the claim in the initial proposal that there were no…
Measuring Grape Smoke Taint Protection
Smoke taint has become a recurring issue since 2008, and one…
Tropical Fruit Aroma in Wine
The overall goal of this project is to produce Chardonnay wines…
