research

2019 Research Annual Report

In just four years, Washington State Wine has more than achieved the goals set in the industry’s initial strategic research plan. The following program components ensure that it remains effective and relevant to industry needs: Industry-Driven: Research priorities are established by growers and wineries.Industry-Guided: Funding recommendations are approved by the…
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WAVEx Webinar | Preparing for Drought

WA Wine | WAVEx Webinar | Preparing for Drought: Does it Make Sense to Drop Fruit | January 21, 2026 Dr. Charles Obiero, Washington State University post-doctoral researcher, conducted research on the timing of drought with Dr. Markus Keller, WSU professor of viticulture. This webinar shared insights on the…
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Advancing Sensor-based Irrigation Scheduling

Final Report – Funding Cycle 2022-2025 – Three years Principal Investigator: Pete Jacoby, Washington State University, Pullman Summary: The objective of this project was to evaluate the combined use of two types of soil water sensors for enhancing irrigation efficiency. Irrigation amount and frequency of application was monitored through recorded…
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Impact of Vineyard Fallow Practices on Northern Root-knot Nematode Densities

Principal Investigator: Michelle Moyer, Washington State University, Prosser Contact: michelle.moyer@wsu.edu (509) 786-9234 Co-PIs: Bernadette Gagnier, WSU; Inga Zasada, USDA-Agricultural Research Service, Corvallis Summary: The Washington State wine industry supported research to explore the impacts of site management practices on northern root-knot nematode (Meloidognye hapla). A previous survey found that…
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WAVEx Webinar | Wine pH Management

WA Wine | WAVEx Webinar | July 14, 2021 | Working with High pH Wines In winemaking, the pH of the grapes and must can affect microbial populations, fermentation rate, flavor and color. Washington’s red grape varieties often contain low amounts of malic acid and the musts have a high…
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WAVEx Webinar | Vineyard Soil Health

WA Wine | WAVEx Webinar | Vineyard Soil Health Insights | March 26, 2025 Dr. Devin Rippner, soil scientist for USDA-Agricultural Research Service, shares an update on establishment of a four-acre Long-term Agroecological Research and Extension wine grape vineyard planted in Prosser as part of Washington State’s Soil Health Initiative.
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WAVEx Webinar | Smoke Research Update

WA Wine | WAVEx Webinar | Smoke Exposure Research Update | January 22, 2025 Dr. Tom Collins, assistant enology professor at Washington State University, leads a multi-pronged research program to assess the risks and develop mitigation strategies for smoke exposed wine and grapes. In this webinar, he provides an update…
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Grape Powdery Mildew: Fungicide Resistance Monitoring and Alternative Management Strategies 

Final Report – Funding Cycles 2020-2024, includes one year no cost extension Principal Investigator: Michelle Moyer, Washington State University, Prosser Telephone: 509-786-9234 Co-PIs: Walt Mahaffee, USDA-Agriculture Research Service, Corvallis; David Gadoury, Cornell University Summary: This project funded for three years had two main objectives of evaluating the use of UV-C light…
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WAVEx Webinar | Phylloxera Risk

WA Wine | WAVEx Webinar | Assessing Your Phylloxera Risk | April 20, 2022 Many Washington vineyards are more susceptible to phylloxera due to soil type than previously thought. Learn how to use the recently developed Phylloxera Risk Assessment Map to determine the risk of phylloxera in your vineyards. Washington…
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Evaluating Novel Insecticides for Grape Mealybug Management, Quantifying Imidacloprid Resistance, Mating Disruption

Final Report: 2021-2023 Principal Investigator: Doug Walsh, Professor of EntomologyWashington State University Irrigated Agriculture Research and Extension Center24106 N. Bunn Rd, Prosser, WA 99350dwalsh@wsu.eduTel. 509.786.9287 Summary: This was a two year project with multiple objectives of screening candidate insecticides for grape mealybug control, learning if grape mealybug in Washington has…