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Defoliation

Acleris gloverana
( Western Blackheaded Budworm )

Armillaria ostoyae
( Armillaria Root Disease )

Caripeta divisata
( Gray Spruce Looper )

Choristoneura spp.
( Budworms )

Coleophora laricella
( Larch Casebearer )

Cryptorhynchus lapathi
( Poplar-and-Willow Borer )

Dichomeris marginella
( Juniper Webworm )

Elatobium abietinum
( Spruce Aphid )

Hyphantria cunea
( Fall Webworm )

Lambdina fiscellaria
( Western Hemlock Looper )

Leptographium wageneri
( Black Stain Root Disease )

Leucoma salicis
( Satin Moth )

Lophocampa argentata
( Silver-spotted Tiger Moth )

Lymantria dispar
( Gypsy Moth )

Malacosoma californicum
( Northern Tent Caterpillar )

Malacosoma disstria
( Forest Tent Caterpillar )

Melanolophia imitata
( Green-striped Forest Looper )

Nepytia freemani
( Western False Hemlock Looper )

Phellinus weirii
( Phellinus (Poria) weirii Root Rot )

Pucciniastrum spp.
( Fir Needle Rusts )

Uredinopsis spp.
( Fir Needle Rusts )

Verticicladiella spp.
( Black Stain Root Disease )