Brown spots/patches on Grape Leaves

Asked June 26, 2016, 3:23 PM EDT

Dear Master, I have 2 grapes as you can see in the pictures and they both look like have the same issue (as seen in the pictures). I tried Googling but could not locate the exact problem I am having. I need your help. Best Regards Frank

Lehigh County Pennsylvania

1 Response

The leaf spots could be anthracnose. Here is a link to a publication on diseases of grape including leaf spot diseases. I recommend you take a sample to your local Penn State extension office and have it identified there or at the plant clinic. Here is a link to their website. Penn State can diagnose and recommend a treatment plan. It's a good idea to remove and bag or burn the damaged leaves to help stop the spread of the spores to new areas.