I have a very heavy infestation of this weed as i back on to a piece of field/wasteland. I've dug, treated, burned & even paved bad areas to no affect, until that is i came across a very old gardening Q&A book. It suggest waiting till autumn/winter wen weed is at it's quietest, unravelling it & leave it soaking in a very weak systemic water mix(a large bucket with a cover on it is required). I'm going to try this at the weekend as i see i have nothing to lose. Will let you know how this goes.