Christmas tree (Common pests)-Root weevil (adult)

Strawberry root weevil (Otiorhynchus ovatus) and others

Pest description and crop damage Larvae are cream-colored, C-shaped grubs that feed on roots, sometimes girdling them. Adults feed on Douglas-fir and true fir needles, resulting in characteristic notching.

Management-cultural control

Site preparation with fallow period prior to planting will reduce habitat for weevils.

Management-chemical control

Control typically targets adult feeding at emergence.

  • acephate (Orthene and others)-(Group 1)
  • bifenthrin ( Brigade, OnyxPro, Sniper and others)-Restricted use pesticide. (Group 3)
  • dinotefuran (Safari 20 SG)-Check registration status at time of application. (Group 4)
  • esenvalerate (Asana XL and others)-Restricted use pesticide. (Group 3)
  • permethrin (Ambush and others)-Restricted use pesticide. (Grp 3)
  • thiamethoxam (Flagship 25 WG)-(Group 4)