"Dgaim" wrote in message
...
My Fantin-Latour, for the past year, has had deformity of most new canes.
There will be healthy canes, healthy canes with some distorted leaves, and
diseased canes. I have pruned off all diseased canes with sterile pruners
and
destroyed them. I don't know how else to describe the damage. Affected
mature
leaves are shriveled and don't open. There's a spiky-witches broom
appearance
to the affected canes. I've looked in all my books without success.

Many thanks

sounds like Rose Rosette Disease, or RRD. Google that and read up, it's
pretty serious stuff.