Diario del proyecto Powdery Mildews of Ontario

Please add the name of the host plant to your observation. If you don’t know the name, please also add a photo of the whole plant. This will help someone to make or confirm an ID of the powdery mildew.

Here is a link to “The Guide to the Powdery Mildews (Erysiphaceae) of the Americas” (written by Senna Robeson). https://uchicago.app.box.com/s/y2wrhwu3huy37cuy6b8lvp8l0smg2m4d