The Napa Valley Grapegrowers on Thursday inaugurated the first Rootstock, an annual conference and exhibit in Napa that replaced two biennial events. It was well attended, with a sell-out group of trade exhibitors as well as attendees, and both the exhibit halls and seminars were crowded with growers, winemakers and staff seeking to learn the latest information about making quality wine.

Among the most interesting sessions was one about “wild” yeast strains that also examined the role of what could be called feral yeasts, cultured yeasts that have gone wild.

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