Ask-a-Dave's-Gardener: How to kill Drymaria cordata (tropical chickweed), 0 by Feebysowner

Feebysowner wrote:
Does anyone know firsthand how to kill this weed? It has run amok in my backyard, which was once Floratam/St. Augustine - there is very little grass left now. I\'ve tried a couple of weed killers that are supposed to kill common chickweed, but they don\'t seem to phase this miserable plant. I have not run across any product that specifically mentions tropical chickweed. I will eventually have to re-sod the backyard, but want to kill this stuff so that I don\'t accidently transfer it to my front yard in the meantime. Thanks!