Biology and Habits

June beetles, also known as junebugs or may beetles, are a diverse group of beetles that are commonly encountered in the spring and early summer. Adults begin emerging in the spring and feed on a variety of plants, including foliage of oak, crabapple, ash, and other trees. Females deposit eggs in the soil, which hatch into C-shaped white grubs. In large numbers, these grubs may cause significant damage to turf. The grubs reach maturity in their third year and pupate into adult beetles by the fourth year. June beetles are strongly attracted to lights and are commonly seen flying into windows or porch lights on summer nights. 

Control
June beetle activity in or around buildings and homes is temporary and treatment is not recommended. However, if the white grubs are damaging turf, it may be necessary to treat these areas with an appropriately labeled insecticide.