The old GardenWeb FAQs about everything were written over fifteen years ago.
Back then, most state departments of agriculture as well as Federal Money supported the idea that RRD didn't affect cultivated roses.

It was only when I raised the question and with the assistance of photographs from Gardenweb, that a few scientists re-looked at what was happening. Even then the guys who spread it were saying that it was a good control of R. multiflora because it didn't bother cultivated roses.

For details, read the chapters in my E-book about the early history of RRD and its intentional spread.

Rose Rosette E-book

Ann

Please post a picture of the growth you are concerned about so we can give you more information.

None of the above post was mine. It was all a copy and paste from the Gardenweb FAQs