World's first organic treatment for Pierce's disease in grapevines
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Presentation on the Blaufränkisch Grape by Noted Wine Grape Geneticist Dr. José Vouillamoz
“We desperately need to get a better handle on the transmission aspects of grapevine viruses in Australia,” Constable said. “Many viruses, including grapevine virus A (GVA) and some leafroll viruses, are transmitted by mealybug and scale. And anecdotally, we’re seeing a lot more scale in vineyards.
Perennia Upcoming Webinar series on Cool Climate Winemaking
By: Luyi Cheng Northwestern University October 16th, 2020 Alison Crowe knows there’s a problem. Crowe is a winemaker in California’s Napa Valley. “If you drove through my vineyards right now, you’d see these cute little fuzzy leaves and tiny little baby grape clusters,” she said in April, when everything in the vineyards looked fine. But around July and August, for some vineyards, red blotches appeared on grapevines’ leaves. The blotches signal infection, caused by a virus that stunts...
OWRI Upcoming Webinar series on Red Blotch disease in grapevine