Grub Control is a highly recommended application that will control grubs in your lawn for the entire season. If you do not have a grub treatment and grubs are present they could destroy your lawn in a matter of days!

https://www.springfieldmo.gov/DocumentCenter/Home/View/15056

http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/insects/beetles/grubs-in-lawn.aspx