ElizabethAnn ...
Galls are common on rugosa roses and generally do not impact the plant significantly. It is crown gall that is the major problem for roses.
Since I do have galls caused by wasps in my garden, I can share that I just cut them out and the roses just keep on going. Since I don't spray, I don't even know if you can do anything about them. None of the roses in my garden that have had galls caused by wasps even slowed down a bit.
However, if your plants are slowly dieing, you might want to check and see if you have galls on the roots. That is crown gall and the rose should be removed.
