Latent infections inside a cluster can take over the bunch by harvest time. PHOTO COURTESY OF CORNELL UNIVERSITY Last year’s cool season not only challenged growers and winemakers with slow fruit ripening, it also brought bunch rot to some vineyards, causing significant damage from a lack of disease awareness. The 2010 growing season was wet throughout, with 40 days of measurable rain recorded in Prosser by Washington State University’s AgWeatherNet system compared with 18 days the previous year. Moreover, it was wet at critical times during the growing season, said Dr. Gary Grove, WSU plant pathologist. “It was wet during […]