Certified GKH Gardening Expert
I would try pulling up as much as you can by hand first, especially around your other plants. You can then use any non-selective herbicide containing glyphosate (like Roundup), but make sure it doesn't get on any plants you want to survive. You can normally use a shield of some sort, like cardboard boxes, to protect the other plants by placing it over top of them while spraying. In place of the herbicide, you can try boiling water, but again, this will kill any plant on contact so shield the plants you're keeping.