Adults emerge between May and July, depending on their geographic location. They feed first on low-growing plants, then fly to tree leaves. Adults live 30-45 days. After mating, each female lays from 40-60 eggs under the soil surface in grassy areas. The eggs hatch after two weeks, and the young grubs feed on fine grass roots until cold weather drives them below the frost line.
Hand pick adult beetles .
If only a few adults are present, they can be collected and dropped into a can of soapy water. Use pheromone traps. Pheromone traps can be used to attract and trap the insects. Place the traps no closer than fifty feet from the vulnerable crop. Traps are available from mail order garden supply catalogs and increasingly at garden and nursery centers.