I cant get rid of black spots on my rose bushes
This article looks helpful Sissy
Remove the infected leaves and spray with Neem oil.
You must remove each infected leaf and put it immediately into a bag. Do not touch the other leaves with the black one. Take off all that have any black in them. Wear gloves and clean the tool you use after. A time consuming job. My bush looked denuded, but it came back fine. It still bloomed without leaves.