I just bought a house and I was pruning my rosebushes and I noticed these brown woody looking bumps on the stems. It looks like part of the bush but when you touch it, it falls away easily and there is a white powder underneath.
Is this a current pest, an old pest that has been killed or something totally different?
they might be aphids but I'm not too sure im no expert or anything. but yea if they are aphids just search the forum theres plenty of ways to fight them instead of just buying chemical sprays. those kill pests but they will have many undesirable effects like killing lady bugs (which eat many aphids for you) or other beneficial insects