Grub worms, also called white grubs, can be found in the soil damaging lawns by feeding on the roots and thatch of turfgrass. Although they're called grubs, they're actually considered an insect as they have six little legs located near the head of their bodies.

Where do grub worms come from?

Not only can these pests damage the lawn, but their presence also invites unwelcome wildlife that feed on lawn grubs — digging up patches of grass in search of them. The majority of grub worms come from Japanese beetles, which lay their eggs in midsummer in sunny areas of the lawn.

What causes grubs in your lawn?

Lawn grubs hatch from eggs that have been laid by scarab beetles just under the surface of your lawn. Once they have hatched, they feast on lawn roots and turn into pupae and re-emerge as scarab beetles. These beetles then feed on other foliage and relay eggs under the lawn, restarting the cycle.