How to Manage Pests
Pests in Gardens and Landscapes
Pine needle weevils—Scythropus spp.
Pine weevils—Pissodes spp.
Pine needle weevil adults are 0.25 inch long, brownish snout beetles. Adult pine weevils are black to
brown, rough-surfaced snout beetles with lighter blotches on their backs.
Pine needle weevils chew needles, notching them along the length. Larvae feed on roots. Needles turn
brown in late winter or spring. Pine weevils distort and chew terminals, killing them. Foliage may become
bushy. Grublike larvae mine shoots. Larvae of some species, such as the Monterey pine weevil, feed on
roots and the trunk near the soil; this feeding can cause unsightly cankers on bark.
Damage caused by pine needle weevils appears not to harm trees. Damaged needles soon drop. No control
is known. Tolerate or prune out damage caused by pine weevils. On high aesthetic value (nursery) trees,
a foliar insecticide spray in the spring may be applied when adults feed and lay eggs.
White pine weevil adult, pupa, and larva (Packard, 1876)