Western Spruce Budworm (Choristoneura occidentaalis) Infestation
widespread outbreak in Northeast Oregon in 1991
copyright 1991-2018 - Gildemeister

Spruce Budworm Infestation
Grande Ronde River west of Perry - 8-2-1991

Spruce Budworm Infestation
I-84 corridor east of Perry - 8-2-1991

Spruce Budworm Infestation
Hwy 244 - Sullivan Gulch - 8-20-1991

Spruce Budworm Infestation
Defoliation - 1992

Spruce Budworm Pupa Case & Moth

Spruce Budworm
defoliation of young trees - 8-2-1991

Spruce Budworm defoliation

Spruce Budworm larvae feeding on needles