I contacted Palatine Roses, source of my Dark Desire roses that have RRD just to make them aware of the infection and to ask for their experience and/or perspective. They have had only one customer notify them of RRD, and that was just once, several years ago. They sent me the following link, which I found very helpful.
One sentence especially caught my attention because it may explain the death of one Dark Desire rose plant after alternating periods of warm and freezing days, with their accompanying growth spurts and foliage death:
"The disease causes the plant to be exceptionally susceptible to freeze damage."
There are some excellent photos too.
http://www.missouribotanicalga...
