Gardening

Not necessarily curtains, but the rootstock may keep sending up shoots. Don't dig the bush up. Maybe loosen the soil near the shoot. Reach down there as close to where it's coming from as possible, and just wrench the shoot off with your hand. Replace the soil up next to the bush, and tamp it down firmly. It may still try to grow back, or others may form. I don't think there would be any benefit to trying to treat the wound, so I would say no.

You could certainly try to transplant the cutting if you want; but as it seems to come from the rootstock, it would likely be a red shrub rose, and not the one that is blooming above ground.