I'm in the process of a test right now. It has been dry and I have been watching a nice patch of crabgrass in my backyard. I let it grow very large. I took a picture of it in all its glory and then I gave it a drink of Drive 75.
I am waiting for the pictures to be developed. The crabgrass is toast. This one did turn purple and brown on the seedheads. One thing is for sure, its dead. We did get 1/2 of rain about 2 days after the application. I know that is important according to the label.
Pricey stuff but really worth it if you have a problem.
I'll post results in a different thread.
Check out the SPONSORS, they keep this site going!!!