2 Major issues when you are having a grub issue:
Yellowing and thinning of grass: As grub worms feed on the roots of grass, the grass isn’t able to take up nutrients and water, leading to yellowing and thinning of the turf.
Moles dig tunnels underground as they search for food, such as grubs. These tunnels can disturb the roots of grass and other plants, leading to poor growth and health.