Grubs are still small and when they are small they are more susceptible to insecticide. There are three choices, Sevin XLR, diazinon or Dursban. With all of these insecticides it is a must to water them in. None of them will be effective unless they reach the grubs. It is best to water these products in as soon as possible after treating.
Rainy days are perfect for applying grub treatment where there is no irrigation.
By now hairy chinch bug damage should be a thing of the past. Most of them are adults now so the majority of the damage has been done. Usually they have stopped feeding by mid-August, but with all the heat they have finished a little earlier than usual. Sod webworm damage is starting to show up. This is a pest that we usually see in late August.