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Common Black Cotton Wood - Populus trichocarpa

Columnocystis abietina
( Wound Parasites )

Cryptorhynchus lapathi
( Poplar-and-Willow Borer )

Fomitopsis pinicola
( Brown Crumbly Rot )

Fusarium oxysporum
( Fusarium Root Rot )

Ganoderma applanatum
( White Mottled Rot )

Hyphantria cunea
( Fall Webworm )

Lymantria dispar
( Gypsy Moth )

Malacosoma californicum
( Northern Tent Caterpillar )

Malacosoma disstria
( Forest Tent Caterpillar )

Melampsora spp.
( Melampsora Foliage Rusts )

Stereum sanguinolentum
( Red Heart Rot )

Venturia spp.
( Poplar Shoot Blights )