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Host Species
Amablilis Fir - Abies amabilis
Pacific Dogwood - Cornus nuttallii
Tamarack Larch - Larix laricina
Western Larch - Larix occidentalis
Lodgepole Pine - Pinus contorta
Engelmann Spruce - Picea engelmannii
Douglas-Fir - Pseudotsuga menziesii
Western White Pine - Pinus monticola
Ponderosa Pine - Pinus ponderosa
Sitka Spruce - Picea sitchensis
Trembling Aspen - Populus tremuloides
Common Black Cotton Wood - Populus trichocarpa