Monday, July 4, 2016
Green June Beetle
Mating takes place during the morning in mid-summer. The female emits a strong-smelling milky pheromone that the male is attracted to and can smell from great distances. Mating lasts several minutes before the male departs and the female disappears into her burrow or under a nearby clump of grass. If mating was successful she will lay up to 75 eggs over the course of 2 weeks. She typically chooses organically rich soil to lay her eggs. The larva, or grubs as they are called, feed on humus and mold early in their development. In their final instar they move closer to the surface of the ground and their feeding habits switch to roots of turf grass, ornamental plants and garden plants. If these beetles occur in large enough numbers their feeding can cause significant damage to grasses, and plants. The grubs pupate in early spring and finish their development by late May or early June when the first of the adults will begin to appear, the peak emergence is in mid to late June.
Unlike their brown cousins the June Bugs or May Beetles, which are active at night, Green June Beetle are day active beetles. The one pictured here was found at my work place in the parking lot in the middle of the afternoon.