Like many who enjoy the hunt and destruction of buckthorn, autumn olive, and tree of heaven, I'm a believer in herbicide. NAISMA has their buckthorn blaster, which is a fantastic idea, and I get it for branding purposes, but its like $30. Not all of us have fancy grants paying our bills. So I bought a few of these, mixed some 50/50 triclopyr and glycophosate with a bit of landscape paint. And it does the job just as well. Best of all, these fit better in my field work bag.