Christmas tree (Douglas-fir)-White pine weevil

Pissodes strobi

Pest description and crop damage A small brown weevil, roughly 0.25 inch long, with the snout typical of other weevils. Wing covers are marked with irregular patches of brown and white scales. Important pest of spruce and pine, occasionally a pest of Douglas-fir.

Management-chemical control

Apply to the tops to control egg-laying weevils as weather warms in spring. Several applications 3 to 4 weeks apart may be necessary.

  • bifenthrin (OnyxPro, Sniper and others)-Restricted use. (Group 3)
  • diflubenzuron (Diflumax )-Restricted use pesticide. (Group 15)
  • phosmet (Imidan 70W)-(Group 1)