Symptoms: Irregular dead spots caused by beetle larvae feeding on grass roots. Damage is worst in the fall. Dead turf pulls up easily, like a rug, revealing c-shaped larvae. Animals such as armadillos, skunks, and gophers dig up lawn to feed on grubs.
Solution: Imidacloprid applied in late spring to early summer is the most effective chemical control. Predatory nematodes are a useful organic control.