In reference to several posts about rugosas:
I too had stem girdler damage - when I tried to put in a raspberry bed. There are wild blackberries close by, and they don't seem so bothered, or perhaps we just don't notice. Anyway, I gave up on the berries and have not seen any stem girdler damage in four (this will be the fifth) summers.
Royal River Roses was originally owned by Suzy Verrier, who now owns North Creek Farm - there's a website for it. She has rugosas, I got my Polareis there.