|
Hosts:
Douglas-fir, white fir, grand fir,
subalpine fir, and western larch.
Look for the western spruce budworm between May and June
The western spruce budworm is the most destructive defoliator of conifers in central and northeast Oregon. Major outbreaks can last for more than a decade and impact millions of acres of forests. The five types of tree damage associated with budworm defoliation are growth loss, deformity, reduced seed production, and tree mortality. Host trees that survive major budworm outbreaks in a weakened condition  are often killed later by bark beetles.
|
Special Projects 
