Disease Susceptibility of Interspecific Cold-Hardy Grape Cultivars in Northeastern U.S.A

Susceptibility to diseases of economically important grapes is critical the evaluation germplasm recommended for commercial production and development sustainable systems. In 2018–2019, cold-hardy grape cultivars including ‘Brianna’, ‘Crimson Pearl’, ‘Itasca’, ‘Louise Swenson’, ‘Marechal Foch’, ‘Marquette’ ‘Petite ‘St. Pepin’, ‘Verona’ were evaluated on non-treated vines susceptibility downy mildew, powdery black rot, anthracnose, Phomopsis leaf spot fruit Botrytis bunch rot. No consistently disease-free, all exhibited some degree rot mildew infection. Relative disease was not consistent across both years, but ‘Brianna’ had greater incidence Swenson’ showed lower in years. The relatively new Pearl’ comparatively moderate overall. Growers typically manage with fungicides farms, so cultivar just one component a pest management system.