I have used Serenade and Green Cure. They both work better if you start early before you see symptoms and maintain a very regular spray program. They're better preventives than cures.

Thanks, I was wondering about that.

We have limited choices up here. Either copper or sulphur based or serenade.

I appreciate your time.

SCG

I don't spray. There was a time I would use diluted sulphur, but I haven't bothered with that in 5 years or more.

There are simply too many good rose choices now that are exceptionally resistant to diseases. If any rose in my garden shows a recurring susceptibility to a specific disease, it now ends up being shovel pruned and replaced with a variety that doesn't.

Life is simply too short to grow bad roses.