Q.Cranefly larvae damage
We were gone for several months and when we returned home the grass in our backyard is mostly dead. A lawn care contractor came and looked at the damage. He noticed small holes all over the yard. He said the damage was caused by cranefly larvae. We want to install new sod, but need to know what is the best way to get rid of the larvae before we put down new sod. Thanks for any suggestions you have.

This article will help you:
https://www.gardeningknowhow.com/plant-problems/pests/insects/crane-flies-and-lawn-damage.htm