Somewhat OT: Getting rid of convolvulus

[masterchen]

Ok, not strictly bonsai, but most definitely garden viciously related, and the bloody thing was creewping its way to one of my bonsai.

I have a most definite invasion of convolvulus on my hands. I *think* it is
Convolvulus arvensis, though it could be another flavuor of the critter. It seems to send out a lot of rhizomes, both on the sufrace and deper in the ground. Lifting the weedmat, found a "spaghetti bowl" of the white root.
Furthermore when the plant grows, it wraps itself around the plkants I want to keep (in this case, rose bushes, about 40 of them!), and slowly srtanlges them.

I can't seem to find a satisfactory way to get rid of them. A couple local garden centres agreed the thing was noxious in the area, but were short on ideas to get rid of them without damaging the roses.

I would really appreciate any thoughts you might have on the matter.

Thanks, and cheers
Lower North Island, Aotearoa / New Zealand

[JATMAN]

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We call it bindweed. I believe the bindweeds have recently been put in to a different genus, because the morning glories objected to being associated with them.
When we darkly moved in to our present house, 1 flower bed was loosely infested with bindweed. Every time I went past which bed, I reached down & pulled some out.
You have to pull out the root. For instance I eventually gotten rid of it. As long as I read that some garden in England got rid of them by putting out stakes for them to twine on, and then spraying them with weed killer.
In the same way central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming train.