Christmas tree (Spruce)-Cooley spruce gall adelgid

Adelges cooleyi

Pest description and crop damage Causes ìpineappleî galls on spruce, the primary host.

See table:

Management-chemical control

Apply to control crawler stage, usually when new growth is expanding in spring.

  • bifenthrin (Brigade, OnyxPro, Sniper and others)-Restricted use pesticide. (Group 3)
  • chlorpyrifos (Lorsban Advanced, Warhawk and others)-Restricted use pesticide. (Group 1)
  • cyclaniliprole (Sarisa)-(Group 28)
  • cyclaniliprole (Group 28) + flonicamid (Group 29)-Pradia
  • dinotefuran (Safari 20 SG)-Check registration status at time of application. (Group 4)
  • imidacloprid (Admire Pro, Prey 1.6 and others)-(Group 4)
  • spirotetramet (Ultor, Movento)-(Group 23)
  • sucrose octanoate (SucraShield and others)-Some formulations are OMRI-listed for organic production.
  • thiamethoxam (Flagship 25 WG)-(Group 4)