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Brown foliage

Acleris gloverana
( Western Blackheaded Budworm )

Adelges cooleyi
( Cooley Spruce Gall Adelgid )

Adelges spp.
( Adelgids )

Camarosporium strobilinum
( Camarosporium Blight of True Fir )

Choristoneura spp.
( Budworms )

Davisomycella ampla
( Davisomycella Needle Blight )

Delphinella spp.
( Delphinella Needle Blight of True Firs )

Dendroctonus ponderosa
( Mountain Pine Beetle )

Dendroctonus pseudotsuga
( Douglas-fir Beetle )

Diaporthe lokoyae
( Phomopsis (Diaporthe) Canker )

Dichomeris marginella
( Juniper Webworm )

Epipolaeum abietis
( Black Mildew )

Herpotrichia juniperi
( Brown Felt Blight )

Isthmiella crepidiformis
( Isthmiella Needle Blight of Spruce )

Isthmiella spp.
( Isthmiella Needle Blight )

Lambdina fiscellaria
( Western Hemlock Looper )

Leptomelanconium pinicola
( Leptomelanconium Needle Blight of Pine )

Lirula macrospora
( Lirula Needle Blight )

Lirula spp.
( True Fir Blights )

Lophodermella concolor
( Pine Needle Cast )

Lophodermella montivaga
( Pine Needle Cast )

Lophodermium piceae
( Common Needle Diseases of Spruce )

Lophodermium pinastri
( Lophodermium Needle Cast )

Lophodermium spp.
( Fir Needle Blights )

Melanolophia imitata
( Green-striped Forest Looper )

Nepytia freemani
( Western False Hemlock Looper )

Phacidium abietis
( Snow Blight )

Pineus spp.
( Adelgids )

Pissodes strobi
( Spruce Weevil )

Pristiphora erichsonii
( Larch Sawfly )

Rhabdocline pseudotsugae
( Douglas Fir Needle Blight )

Scirrhia pini
( Red Band Needle Blight )

Virgella robusta
( True Fir Blights )