Mix Rate: 1oz Drive in 3 Gal spot sprayer w/ sticker Coverage per 3 gal: about 3000-4000 sq ft Temperature: b/t 78-86 degrees Did 3 test strips to see if drive is affecting turf below crabgrass applications. Results: 4 days later-minimum tip browning 7 days later noticeable browning Don't know why the product is doing this. Applications are even and are applied just enough to wet the crabgrass. If I try to cut back a little on the drive, get little to no effect. Any suggestions would help. Thanks.