Can you help recognize this disease?
Hi there. A lot of my roses started developing a disease in the last 1-2 months.
It's got these yellow spots on the frontside of the leaves and black/yellow fungus-like dust spots underneath. I'll attach pics because it's hard to describe. (Uhh, I can only add 1 pic).
I'm trying to Find what it is named so I can get treatment. Hope you can help. Thanks a lot !!!