Posted: 30/08/2012 at 19:01
I don't know if anyone else will agree, but I have noticed that brambles root when the stems touch the ground, so maybe cutting down top growth will limit further new growth. If you have an agricultural store near you, I'd visit it and see what chemicals they have to help, if that is acceptable to your gardening practice. I seem to remember that there is a potion ( not cheap I fear) that is effective. And would endorse yvonne1's advice - DON'T ROTOVATE.