In late summer, adults emerge from pupal cases, but they do not leave the ground. These beetles overwinter, emerging the next spring to feed and mate. Green June beetles complete one generation each year. May beetles produce one generation approximately every 3 years. In spite of the length of this life cycle, generations overlap so that both beetles and grubs are present every year.
Crop rotation is the most effective control method.
In areas where green June beetle grubs are the primary problem species, avoid planting small-seeded legumes or grasses immediately after plowing under larger amounts of vegetative matter. For current control recommendations, consult the current North Carolina Agricultural Chemicals Manual .