Thanks for the suggestions. Don't know if this will work long term, but I am mowing the crap out of it. It is tiff Bermuda (golf fairway grass) so I can cut it short. When I do that, what's left of the dallisgrass are these round, flat pods about the side of a dinner plate. they are very visible and very exposed. Now, I know you are supposed to put round up on the leaves, and I have done that. But with the flat pods, I have basically been walking around like Dirty Harry, round up pistol in hand, gunning down every sorry ass pod that comes within my line of sight. On the flat ones, I am spraying smack in the middle. Very little gets on the surrounding grass, and the pod turns brown within 30 minutes. One batch I zapped about a week ago is deader than a doornail. Yeah, I am probably doing it wrong, but it sure is quick and easy this way. The hope is to kill off the big plants, dig up the carcass in the winter, put sand down, and over seed like hell in the Spring. For the rest of the Summer, mow like crazy to hopefully suppress new development. We'll see.....
[This message has been edited by Captain Pablo (edited 8/22/2011 3:14p).]