Bug Identifier
Black Vine Weevil
Community identification

Black Vine Weevil

Otiorhynchus sulcatus

Order & Family
Coleoptera (Beetles), Curculionidae (True Weevils)
Size
8 mm to 11 mm (0.3 to 0.4 inches)
See this bug in the Encyclopedia

Natural Habitat

Gardens, nurseries, forests, agricultural fields, and occasionally indoor spaces when seeking shelter

Diet & Feeding

Herbivorous; adults feed on leaves of over 100 plant species (including rhododendrons, yews, and strawberries), leaving characteristically notched leaf edges. Larvae feed underground on plant roots.

Behavior Patterns

Flightless and nocturnal, adults hide in soil, leaf litter, or dark crevices during the day and climb host plants at night. Reproduction is primarily parthenogenetic (females lay unfertilized eggs without males).

Risks & Benefits

Risks: Significant agricultural and horticultural pest. Larval root feeding can stunt growth, cause wilting, or kill ornamental and crop plants. Benefits: Minimal, mainly serving as a food source for ground beetles, birds, and small mammals.