Kalkaska County landowner

Asked June 24, 2020, 8:11 AM EDT

I have a landowner in Kalkaska County that planted grapes and had this condition occur on the leaves. Any idea what this is? Fire blight? Larry Caelusta, Kalkaska Conservation District Forester

Kalkaska County Michigan

1 Response

Hi there,

This is Phomopsis cane and leaf spot (caused by the fungal pathogen Phomopsis viticola), for more information about early season vineyard management see: https://www.canr.msu.edu/news/early_season_vineyard_disease_management