Second crabgrass preventer application

I put down the second application of the crabgrass preventer on May 12th hoping for some rain that night to work it in. That didn't happen and it wasn't until yesterday that we got some rain and only .10" at that, but I irrigated today so that should do the trick. It also give the grass some more fertilizer which is good. I want it to outgrow the diseases. So far no signs of any crabgrass, so the half application seemed to do the trick.