Has anyone ever use MSMA to treat crabgrass? Im asking because I have been treating a clients lawn bi-weekly with MSMA to get rid of a large area of dallas grass. Im on my 3rd application and it starting to look like its having some effect on the dallas. A couple apps ago I had some left in the back pack so I sprayed it on a patch of crabgrass in a vacant house next door. When I went back it looked like the MSMA had some sort of effect on the crabgrass. I had stop growing, it had spots all over the blades, and it had started turning yellow a little bit. I sprayed it again but I haven't been back to see what has happened. Just wondering if anyone else had tried this.