Have you seen it?? It KILLS the sand burrs, but leaves the grass alive. It's called 529 MSMA, and can be purchased at any of the local Seed/Feed stores. I've used it for 2 years now, it works great if you want to see a bunch of dead sand burrs. It's about $12.60 at West Feed Store and $13.++ at Jupe's, per quart. One quart makes 100 gallons of spray.