At least half a dozen species of weevils occur in landscapes
in Pacific Coast states. The black vine weevil, Otiorhynchus
sulcatus, is the most damaging. Larvae can seriously
damage roots and girdle plants near the soil surface, causing
a general decline and death of young plants.
Other weevils include the obscure root weevil (Sciopithes
obscurus), the woods weevil (Nemocestes incomptus),
the live oak weevil (Deporaus glastinus),
and the pine needle weevil (Scythropus spp.).
Larvae of several of these feed on roots or bark around
the crown and can injure container plants in nurseries.
black vine weevil on euonymus leaf