To eliminate bindweed, certain cleaning plants have also proven themselves, this is the case for plants of the tagetes family, which are toxic to bindweed. As a preventive measure, try the marigold, or Tagetes patula or the Tagetes nématicides, a plant whose root secretes anti-bindweed, anti-quackgrass and anti-nematode herbicidal substances.
https://www.alsagarden.com/blog/elimine ... n-miracle/