Garlon/Remedy will take care of that. Try a basal bark appication of 1 part herbicide with 3 parts diesel. Dont need much.I’ll have to try Garlon. It almost seems like you do need something that stays around forever with bush honeysuckle though. This stuff loves to sucker back from roots years after it was “killed”, or “removed”. Would be nice to have an affective spray for the lower growing ones as pulling those just always just seems to lead to future suckers from little root pieces left behind.