Is this Japanese knot weed
Hi. Any help appreciated, we have very suddenly had growth of vine weed and something similar appear in a number places in the garden. I am confident recognising the vine weed as it has the very distinctive trumpet like flowers. The other I am not sure of.
It has a similar vine like appearance and wraps itself around other plants as it grows. The leaves are heart / arrow shaped and quite thick and glossy - more like an ivy leaf than the softer vine weed leaf. The stalks from ground are dark maroon quite thick and full of sticky sap if you break them. The flowers are clusters of tiny and white on a cluster shaped a bit like a bunch of grape. Could it be Japanese knot weed - looking at Google the flowers look right but the leaves are different.
Next question is what do I do about them. We have about 3/4 acre so not sure where to start.