Have you tried blasts of water from your hose end sprayer? Is this a fast moving insect? I've successfully picked off certain pests that weren't too speedy. Wear the gloves of death, pick, and squeeze. It's very satisfying. This pest looks like it might be fast, though. I wish I could help more--here in the desert we don't have a lot of insect pests, mainly some thrips. Diane

Much closer view needed - at this point it looks like the supposed culprit may even be a spider.

Your location would also help.

Not sure, because it is a side shot.... but is it a Shrilanka weevil.... we get them here in Florida.... they are NOT native to our location so nothing attacks them.... they are really nasty and can decimate roses, shrubs and trees..... if it is the Shrilanka weevil about the only thing that gets rid of it is Othene....