Arborvitae Weevils


They are small and black, covered patched metallic green and fine short hairs. Their grubs, are white to pink with brown heads, attack arborvitae roots from June or July to midwinter sometimes into the following spring. Then they emerge from the soil to feed on leaves from May to July. Marks appearing in the margins of arborvitae leaves probably means these weevils are eating. The adults usually will be mostly active at night and hide in soil and ground debris during the day. Adult weevils will act dead when disrupted, crossing their legs and dropping off plants and falling to the ground.