They are white with a brown head, have a C-shaped body, and 3 pairs of short legs immediately behind the head. White grubs are one of the most destructive insects of turf. They feed on roots and are capable of destroying the entire root system. These grubs complete a life cycle in one year. Adults are present starting from late June into July.
Adults feed on the foliage.
Eggs are deposited in the soil under the turf. Small grubs begin feeding on grass roots, consuming more over larger areas as they grow. Most damage occurs in late summer and early fall after grubs are half grown. Grubs move deeper into the soil to over-winter and as the soil warms in the spring, they move up to the grass roots, feed a short time, pupate, and then emerge as adults to begin the cycle over again. Adults are active in the spring from late May until early July.