Minor pest to
Abies alba (Silver fir)
Abies concolor (Colorado Fir)
Abies grandis (Grand Fir)
Betula pendula (Silver Birch)
Betula pubescens (White Birch)
Corylus avellana (Hazelnuts)
Pinus jeffreyi (Jeffrey Pine)
Pinus ponderosa (Ponderosa Pine)
Pinus resinosa (Red Pine)
Pinus strobus (White Pine)
Pinus sylvestris (Scot's Pine)
Pyrus communis (Pears)
Salix alba (White Willow)
Sorbus aucuparia (Mountain Ash)