Yep, that's exactly what it does, its practically impossible to get rid of it. On unplanted ground, the best thing is to give it a thorough dig and remove every bit of root you find, then turn it over again and remove more. Every tiny piece left in will grow again. However, as yours is growing amongst your plants, you've only got one course of action. Place canes where you can see it growing - the bindweed will twine around the canes and once you've got a good bit of growth, treat with glyphosate. If you use a spray, protect the plants around and about from spray drift.

And before you spray, lay the canes flat - its easier to keep the spray off the other plants that way. Also watch the bed every day and hoe off every tiny new shoot to avoid feeding the roots. The roots are horrible brittle fat white things that go down several feet, and some gardeners call them devil's guts - after fighting them myself I can see why! Good luck with it.

I personally would avoid digging about to get the roots out. Unless you wait until early next spring and get every root ball out and clean them up. Leave on little piece of root behind and you have new plants. But I'd certainly do as advised above re the glysophate. train it round a cane, or put the above ground section in a bag and spray.

thankyou for your responses im now going on a mission today canes in hand in prep to get them all.

"Spraying" should be undertaken with due care. Try dripping the killer on leaves or use an artist's paintbrush to apply the killer thus avoiding any killer getting onto your prized plants. It takes a little longer but does ensure that the wind does not carry spray to the wrong places.

Putting the cane in a bag before spraying is a brilliant idea, 2ndhand - wish I'd thought of it when I had the problem.

I must adnit I personally don't bother waiting for it to grow up a cane, I just poke all the top growth into a small hole in a bag and spray away. I leave the bag in situ for a while until it dries.