Clematis: What's wrong with this clem?, 0 by Sharkey

Sharkey wrote:
Guru, here are the plants. There is a multiblue and a carnaby planted next to the steps. In fact, Carnaby has just finished its second flush of blooms, which I just snipped off a few days ago. Both did very well. Carnaby was a liner, so no big loss if I have to dig it up. These look awful right now. They are next to a knockout shrub rose which I sprayed with that awful stuff less than a week ago. I wonder if the same Ortho spray would kill the clem?

Thank you for the links, BG. I tried reading the research, but I'm still having my first cup of coffee and couldn't absorb a lot of it this early. If this is a fungus, I need to know how to treat it, or just dig up the plant and discard it.