Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Photo 1: Anthracnose on grape berries
Anthracnose thrives in warm, wet weather. In Minnesota, some vineyards see Anthracnose every year, and others rarely have a problem says University of Minnesota Grape Breeder Dr. Jim Luby. The Canadian researchers found Frontenac and Frontenac Gris to be resistant to anthracnose, Frontenac Blanc and La Crescent to be susceptible, and Marquette to be highly susceptible. Growers interested in trying new wine grape cultivars should learn about disease resistance to several grape diseases in addition to anthracnose. Downy mildew, black rot, powdery mildew and Botrytis can all be problematic in Minnesota vineyards. More information about disease resistance and culture of cold hardy grapes can be found at the University of Minnesota Cold Hardy Grape webpage.