Black Vine Weevils (Otiorhynchus sulcatus) are one of the most widely distributed and destructive species of root weevils. Adults are large (about 3/4 of an inch long), gray or black in color and cannot fly. They have distinctive snouts and elbowed antennae. Black vine weevils and strawberry root weevils look very similar, but the black vine weevils are much larger (about twice the size). Adults feed at night and tend to hide in plants, mulch or garden debris during the day. The larvae feed on plant roots, and tend to be even more destructive than the adults. Black vine weevils cause damage to a wide variety of plants both indoors and outdoors, but especially plants of the cyclamen genus. Adults lay their eggs in the soil in spring. They can lay up to 500 eggs in just 2-3 weeks. They then hatch into tiny larvae a week or two later. The larvae feed on plant roots in the soil until temperatures decrease in the fall. They overwinter as larvae in the soil and emerge in early spring where they continue to feed until they pupate and eventually emerge as new adults. Black vine weevils have one generation per year.