Plenty of experience, just not with the chemical application part of it. It is definitely crabgrass. I've got another battle with nutsedge.
I'm simply trying to get as much of a leg up on this issue as I can. I have tried to control it in the past with some passive aggressive attention, but that isn't working any longer. If it was up to me I'd take out the beds and put down sod, but they won't go for that.
I know that it dies with the first frost; that has already happened. But it comes back every year with a vengeance.