Its host plants in the native range include conifers like the Lodgepole Pine ("Pinus contorta"), the White Spruce ("P. glauca"), and the Coast and Rocky Mountain Douglas-firs ("Pseudotsuga menziesii"). Outside the native range, it is also found on species like the Eastern White Pine ("P. strobus") and Red Pine ("P. resinosa") in eastern North America and Europe, and the Mountain Pine ("P. mugo"), European Black Pine ("P. nigra"), Scots Pine ("P. sylvestris") and Pistachio ("Pistacia vera") (pistaches or pistacio trees) in Europe.