Black vine weevil
What are black vine weevil?
The black vine weevils (Otiorhynchus sulcatus) are considered as one of the most damaging insect pests of over 100 species of greenhouse, nursery and landscape plants. Main host plants include azalea, grapes, Japanese holly, Ilex crenata, rhododendron, Rhododendron spp., yew, Taxus spp., euonymus, Euonymus spp. Both adults and larvae of black vine weevil cause direct damage to host plants. Adults mostly feed on foliage and flowers whereas larvae (also called as grubs) feed on the roots. Adult weevils are 10- 15 mm long and black or gray in color. Although adults have both front and hind wings, they cannot fly. They also have typical elbowed antennae and a prominent short snout. Fully-grown grubs are C-shaped, legless, about 15 mm long and whitish in color with brown head capsule.