What is this Bayer w/Merit of which you speak?
It is a wonderful grub control product you put down once and it kills grubs all season long. I like it because it’s pretty specific and I don’t have a problem with outside bugs that don’t eat my grass. Except for mosquitoes, gnats, flies, and ticks. Oh wait, maybe I do have a problem with outside bugs after all! LSA

Merit is a trade name for imidacloprid.
I won a bag of this stuff in a drawing at werk. So I've got it stored in my garage and dang if some chipmunk chewed it's way into the bag and strewed it all over the place. Steenkin' varmints!