Green June beetles (Figure 1) and bluewinged wasps (Figure 2) are beginning to cruise turf areas now. Green June beetle grubs feed on organic matter in the soil. These grubs do not feed on plant roots, but they can uproot seedlings as they visit the surface at night and churn the soil.
Green June beetle grubs are the targets of bluewinged wasps. The vividly colored wasps zoom over grassy areas in search of grubs. Female wasps enter the soil to lay eggs on the beetle larvae. While intimidating, the wasps are neither aggressive nor dangerous.
By Lee Townsend, Extension Entomologist