I work 99.9% with bermuda lawns and have much more experience with MSMA, but I sprayed a 45,000 sq. ft. zoysia lawn that was newly installed about 9 weeks ago with 1 lb. of Drive and 1 pint oil surfactant. I have never used Drive before. Every seem of the sod was crabgrass and some crabgrass was out in the middle of the zosia. Much of the crabgrass was large. It has been 6 days since the application and the results are looking pretty good, but not a kill yet. So, my question is when will the results have peaked? I told the homeowner that everthing this one application is going to kill should have happened within 2 weeks. Am I right? Any Drive tips/recommendations from the people who use it alot would be appreciated.