In Ohio, the local parks have been treating bush Honeysuckle with Round- up (Glyphosphate) in mid November because by then the only thing green in the woods is Honeysuckle, there for it is the only specieses effected, all of the desirable woody plants and trees ie, Oak, Maple ect.. are already dormant. I have tryed this at My farm and the result was around 85% kill with nothing else effected.