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 3A)-Restricted use pesticide
- cyantraniliprole (Mainspring GNL) (Group 28)
- cyclaniliprole (Sarisa and others) (Group 28)
- cyclaniliprole + flonicamid (Pradia) (Group 28 + Group 29)
- dinotefuran (Safari 20 SG) (Group 4A)
- imidacloprid (Montana, Nuprid 4F and others) (Group 4A)
- spirotetramat (Ultor, Movento) (Group 23)
- thiamethoxam (Flagship 25 WG) (Group 4A)