Orange areas on grape leaves

Asked August 18, 2019, 3:45 PM EDT

As I was picking off some Japanese beetles, I noticed some orange areas on some grape leaves. I am assuming it is a rust of some sort. I am not sure how to treat it.

Arapahoe County Colorado

1 Response

Hi,

Without a photo, we think it is black rot. See the information below for how to control it.

https://ask.extension.org/questions/156104

The Purdue information no longer seems to be available, but if you click on the Ohio State link, it provides a photo, information, and how to control it.

Hope that helps.
Judy