Lawn grubs can be very damaging to the health of your lawn. One way to help prevent grubs in your lawn is by thatching lawn on a regular basis, especially if the thatch is starting get out of hand. You will know if you have a lot of thatch in your lawn by trying to walk across it and it leaves footprints in your grass. The best way to do thatching is to rent a power rake and use that rake to pull out all of the dead grass and unwanted debris from your lawn. Since grubs tend to live either right on the surface or just below, getting rid of the thatch gets rid of their places to hide. Now, grubs are going to be a lot more exposed to natural predators such as birds and gophers.
Thatching doesn’t typically get rid of grubs, it only helps to prevent them. Once you have grubs in your lawn, you’re going to probably have to use grub control to get rid of them. You want to apply the grub control following the application instructions given on the label. I prefer to use a granular application for controlling grubs than using a liquid. A liquid application is a contact pesticide. And it will only control insects that are eating the top of the grass. Since grubs spend most of their time underneath the soil, eating the roots, it would be way more effective to use a systematic pesticide rather than a contact pesticide. This is why I think it is better to use a granular application. Aside from using chemicals, you can also use spike aerator shoes to help control grubs in your lawn, and you can even use a natural predator such as a nematode to help you control the population of grub worms in your lawn.