Digger wasps are insect inhabitants which usually do not damage the turf grass. They can be present in all turf grasses however. This wasp is about l 1/2 inches long and has bright yellow markings on its body. The wasp digs burrows in the ground and mounds the soil at the entrance. The female paralyzes grubs or cicadas by stinging them and places them in the burrow and lays an egg on it. When the egg hatches the larva feeds on the insect.
Cicada killer wasps usually appear in late July and August when adult insects are abundant. Although they generally have a mild disposition they can sting if molested. They cause no primary damage to lawns and therefore treatment is generally not recommended. Their presence sometimes though is unnerving and their burrows may detract from the appearance of a well-manicured lawn.