Host Species

Amablilis Fir - Abies amabilis

Grand Fir - Abies grandis

Alpine Fir - Abies lasiocarpa

Birch - Betula spp.

Pacific Dogwood - Cornus nuttallii

Tamarack Larch - Larix laricina

Western Larch - Larix occidentalis

Jack Pine Pinus banksiana

Lodgepole Pine - Pinus contorta

Shore Pine - Pinus contorta

Engelmann Spruce - Picea engelmannii

White Spruce - Picea glauca

Black Spruce - Picea mariana

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

Willow - Salix spp.

Western Hemlock - Tsuga heterophylla

Mountain - Tsuga mertensiana

Western Redcedar - Thuja plicata