Blackberry disease

Asked September 13, 2020, 4:09 PM EDT

Hello, I have these spots on a bunch of my blackberry leaves (and on some canes). I’ve noticed them since the spring so I don’t think it’s due to the heat or smoke/ash. I don’t see any bugs on the leaves (I checked the undersides, too). Do you know what this is and how I combat it? Thank you, Bethany

Washington County Oregon

1 Response

Common fungal disease called Septoria leaf spot. The following article describes the disease and ways to manage it: