Blackberry plant fading leaves
Our blackberry plant is young. Although supposedly an upright variety it has long runners. Some of the leaves seem to be dying. We have kept it watered, but a month ago we had a great deal of rain here in South Carolina. I think it could be rust, but unsure. The leaves eventually fall off. It is mainly on the more mature parts.
Certified GKH Gardening Expert
This definitely follows the symptoms of a rust. Here is an article that will help you: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-orange-rust-treatment.htm