Christmas tree (Douglas-fir)-Black pineleaf scale

Nuculaspis californica

Pest description and crop damage Gray-black scale. Hosts: Douglas-fir and pine.

Management-chemical control

  • azadirachtin (AzaDirect and others)-Some formulations are OMRI-listed for organic production.
  • bifenthrin (Brigade, OnyxPro, Sniper and others)-Restricted use pesticide. (Group 3)
  • buprofezin (Talus)-(Group 16)
  • chlorpyrifos (Lorsban Advanced, Warhawk and others)-Restricted use pesticide. (Group 1)
  • dinotefuran (Safari 20 SG)-Check registration status at time of application. (Group 4)
  • horticultural oil (Ultra-Pure, 440 Superior Oil and others)-Some formulations are OMRI-listed for organic production.