Botryosphaeria is often overlooked as a pathogen for canker diseases of grapevines, but Dr. Doug Gubler of the University of California, Davis wants growers to have a closer look at the fungus. Learning what to look for is a first step, however. Botryosphaeria cankers are often confused with the eutypa cankers that have long been considered the primary canker of California grapevines, Gubler told growers attending the British Columbia, Canada, Wine Grape Council’s annual viticulture and enology conference in Penticton, British Columbia this past summer. While botryosphaeria was known in southern California, it wasn’t suspected in northern parts of the […]