My buddy, this year in late April as Bermuda was coming out of dormancy, decided to spray his own 4000 sq ft front lawn with a 25 gallon sprayer. He added: Half of a 2.5 gallon jug of Tri-mec Quarter jug of Prowl and God only knows how much Blue die was in that tank. He said the die was used to ruin the kids shoes that walked across his lawn on their way to school. He put all of the 25 gallons on the front lawn (driveway included). Yep, it looked like something from the Smurfs. Even he was blue from head to toe. When I asked him what he was doing, he replied that he had some Crab grass that he needed to get rid of. LOL! Needless to say, all he has now is crabgrass. And I do have video of it to prove that people are that dumb. OR in his case, highly intoxicated!