Napa Valley Wine Community Pledges $2.5 Million to Fight Red Blotch Virus
Phase One of the Grapevine Red Blotch Virus Research Initiative will fund competitive research grants, with the first calls for proposals in January 2027.
NAPA VALLEY: Winegrowers and wineries have pledged $2.5 million to launch Phase One of the Grapevine Red Blotch Virus Research Initiative, a public-private collaboration aimed at accelerating practical research into grapevine red blotch virus, one of the wine industry’s most stubborn threats.
The pledge, announced Oct. 6, brings together growers, wineries, researchers and public institutions behind a coordinated research program. Phase One is designed as a three-year effort supporting multiple projects at leading research institutions, with defined milestones and a clear path from scientific discovery to vineyard use.
The initiative gained momentum through leaders including Christian Moueix of Dominus Estate, Darioush Winery, Joseph Phelps Vineyards, Joe Wender and Ann Colgin, Louis P. Ciminelli of Laelius Winegrowing, Opus One Winery, Phillips Family Farming and Vine Hill Ranch, Tom Gamble of Gamble Estates, Pete Richmond of Silverado Farming Company, the Araujo family and other industry figures, according to a corrected announcement from the initiative.
The wine community deserves tremendous credit for stepping up with the resources to put that plan into motion.
Red blotch virus impairs vine performance, delays fruit ripening, alters grape composition and diminishes wine quality, while driving up management costs and replanting. Growers still lack early detection methods and proven field strategies to limit the virus’s spread or manage affected vines, which the initiative describes as one of the most serious unresolved threats facing wine production.
Researchers and industry leaders have come together to identify the most urgent Red Blotch research needs and coordinate the work aheadDr. Ben Montpetit, chair of the UC Davis Department of Viticulture and Enology
The effort began in 2025 as discussions among wine industry and research leaders, initiated by the Moët Hennessy Robert-Jean de Vogüé Research Center, about the principal knowledge gaps in red blotch and the need for a coordinated, multi-institutional response. In July 2026, the discussions culminated in a meeting of industry and research participants to refine research priorities and consider a shared funding effort, and a smaller working group was formed to evaluate governance and administrative options.
What the research will target
The first competitive calls for proposals will focus on earlier, more reliable detection and diagnostic methods; virus and vector biology, including transmission and patterns of spread; practical mitigation and vineyard-management strategies; and nursery testing, clean plant material and validation of diagnostic tools. The program may also support work on vine physiology and longer-term resistance.
Research awards will be made through open, competitive calls available to qualified institutions. A proposed 10-member governance committee with equal representation from the wine and research communities will set priorities and budgets, approve calls for proposals and make final funding decisions, while an independent technical review panel will evaluate proposals for scientific merit, feasibility, team capability, measurable milestones and practical vineyard impact.
The initiative is working with the American Vineyard Foundation to serve as fiscal agent and program administrator for Phase One, with administrative agreements expected to be completed soon. The first calls for proposals are expected in January 2027, with initial funding decisions in spring 2027. Additional fundraising will continue to expand the program and support future phases; growers and wineries interested in supporting the initiative are asked to contact Bart Araujo.
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