I have 6 DA roses and GJ is the only one that gets it. I prune it of to the extent there is very little left by winter, prune and feed at correct times and it comes back from the dead with lovely roses again in spring. It just looks so awful for so long though. Wondering if it’s time to get rid although I love it. I don’t use any pesticides.
Its odd as none of the other DA roses struggle like this.