How to kill a buddleia?
It's growing in the 8" gap between the greenhouse and the boundary fence (sheep netting). It's distorted the greenhouse frame, breaking one of the panes. I've hacked back the buddleia and replaced the pane.
Knowing that buddleias like a good prune I'm assuming it's likely to carry on growing and cause more damage, so I'd like to kill it. First thoughts are chemical, but I don't know what to use and how to apply it.
Ideas?