This weed killer is one of Wine Country’s biggest controversies. Can a Napa group phase it out?

The vineyards at Spottswoode Winery in Napa in 2016. The winery is among a handful of growers that has phased out its use of synthetic herbicides. Gabrielle Lurie/Special to The Chronicle Roundup products for sale at a hardware store in San Rafael. A Napa nonprofit that ceritfies sustainable wineries hopes to phase out the controversial […]

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