Adelges cooleyi
Pest description and crop damage Causes "pineapple" galls on spruce, the primary host.
See table:
Hosts and Symptoms of Major Aphid and Adelgid Pests of Christmas Trees
Management-chemical control
Apply to control crawler stage, usually when new growth is expanding in spring.
- bifenthrin (OnyxPro, Sniper and others) (Group 3)-Restricted use pesticide. Some products not registered for use in Washington.
- carbaryl (Sevin and others) (Group 1A)
- cyantraniliprole (Mainspring GNL) (Group 28)
- cyclaniliprole (Sarisa and others) (Group 28)
- cyclaniliprole + flonicamid (Pradia) (Group 28 + Group 29)
- dinotefuran (Safari 20 SG) (Group 4A)
- esfenvalerate (Asana XL and others) (Group 3A)-Restricted use pesticide.
- horticultural oil (Drexel Damoil, Purespray Green and others)-Test for phytotoxicity for any new product prior to widespread use. Some formulations are OMRI-listed for organic production.
- imidacloprid (Montana, Nuprid 4F and others) (Group 4A)-Some products not registered for use in Washington.
- insecticidal soap (M-Pede and others)-Some formulations are OMRI-listed for organic production.
- spirotetramat (Movento) (Group 23)