Adelges piceae
Pest description and crop damage Appear as cottony or grayish mass on stems. They produce swelling at nodes and tips and are especially damaging to Fraser fir.
See table:
Hosts and Symptoms of Major Aphid and Adelgid Pests of Christmas Trees
Management-chemical control
Apply to control crawler stage around bud break, usually mid-April to early May.
- 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)
- esfenvalerate (Asana XL and others) (Group 3A)-Restricted use pesticide
- imidacloprid (Montana, Nuprid 4F and others) (Group 4A)
- insecticidal soap/oil (M-Pede)-Some formulations are OMRI-listed for organic production. Note: Some oils may cause discoloration. Test for phytotoxicity for any new oil product prior to widespread use.
- spirotetramat (Ultor, Movento) (Group 23)
- thiamethoxam (Flagship 25 WG) (Group 4A)