Posted: 08/05/2015 at 22:37
It can be dug out if you have the time and inclination. We had bindweed rife at the top end of our garden four years ago. I dug several bin bags of roots out and have not had any re growth (and I don't claim to have removed every piece). The received wisdom that every bit of root left behind will regrow is probably a bit wide of the mark. Every piece left behind has the capacity to regrow but not all will as they won't all be valid.
If you have the time and energy to dig and use glyphosate combined you can minimise any re growth quite effectively.
Good luck with whichever method you go for