I think this is not a gall caused by a wasp...I've seen them ant the galls are much smaller and turn reddish..more hairy looking. I think this is a stem gall caused by a bacteria or something else. The problem roses are in Edmonton and my roses are in Calgary. I have not had these galls on my roses so I wasn't sure what to advise. She is going to take the roses out. the concern is that it may spread to some of her ornamental trees & shrubs. Looks like the roses are only affected
