Choristoneura fumiferana
Pest description and crop damage Green-brown larvae up to 1 inch long feed on foliage and buds of fir, spruce, and Douglas-fir.
Management-chemical control
Apply May-June or when bud flush is at 90 to 95% and new growth is 0.75 to 1 inch. Pay particular attention to areas adjacent to infested forest. Two applications may be necessary.
- carbaryl (Sevin and others) (Group 1A)
- Burkholderia spp. (Venerate) - OMRI-listed for organic production.
- Chromobacterium subtugae (Grandevo)-OMRI-listed for organic production
- esfenvalerate (Asana XL and others) (Group 3)-Restricted use pesticide
- methoxyfenozide (Intrepid 2F) (Group 18)
- spinosad (Blackhawk, Conserve, Entrust and others) (Group 5)-Some formulations are OMRI-listed for organic production
- tebufenozide (Confirm) (Group 18)