Black Vine Weevil

Scientific Name: Otiorhynchus sulcatus

Order & Family: Order: Coleoptera; Family: Curculionidae

Size: 8 to 11 mm (approximately 0.3 to 0.4 inches)

Black Vine Weevil

Natural Habitat

Found in gardens, nurseries, and greenhouses; often wanders into homes during the night or seeking moisture.

Diet & Feeding

Adults feed on the leaves of over 100 different plant species (including yews and rhododendrons); larvae feed on plant roots.

Behavior Patterns

They are nocturnal, flightless, and reproduce through parthenogenesis (all individuals are female). They typically hide in soil or mulch during the day.

Risks & Benefits

They are a significant agricultural and horticultural pest because the larvae can kill plants by girdling the roots. They are harmless to humans and pets, but can be a nuisance indoors.

Identified on: 6/18/2026