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Acleris gloverana
( Western Blackheaded Budworm )Adelges cooleyi
( Cooley Spruce Gall Adelgid )Adelges spp.
( Adelgids )Arceuthobium spp.
( Dwarf Mistletoes )Argyresthia cupressella
( Cypress Tip Moth )Armillaria ostoyae
( Armillaria Root Disease )Atropellis piniphila
( Atropellis Canker )Botryosphaeria piceae
( Botryosphaeria Canker of Spruce )Buprestis aurulenta
( Golden Buprestid )Camarosporium strobilinum
( Camarosporium Blight of True Fir )Caripeta divisata
( Gray Spruce Looper )Carulaspis juniperi
( Juniper Scale )Choristoneura spp.
( Budworms )Chrysomyxa arctostaphyli
( Spruce Broom Rusts )Chrysomyxa monesis
( Coastal Spruce Cone Rusts )Chrysomyxa pirolata
( Inland Spruce Cone Rusts )Coleosporium asterum
( Western Pine - Aster Rust )Columnocystis abietina
( Wound Parasites )Cronartium ribicola
( White Pine Blister Rust )Cronartium spp.
( Stem Rusts of Pine )Cryptorhynchus lapathi
( Poplar-and-Willow Borer )Davisomycella ampla
( Davisomycella Needle Blight )Delphinella spp.
( Delphinella Needle Blight of True Firs )Dendroctonus ponderosa
( Mountain Pine Beetle )Dendroctonus pseudotsuga
( Douglas-fir Beetle )Dendroctonus rufipennis
( Spruce Beetle )Dichomeris marginella
( Juniper Webworm )Discocainia treleasei
( Discocaninia Canker )Dryocoetes confusus
( Western Balsam Bark Beetle )Echinodontium tinctorium
( Brown Stringy Trunk Rot )Elytroderma deformans
( Elytroderma Needle Cast )Endocronartium harknessii
( Western Gall Rust )Epipolaeum abietis
( Black Mildew )Fomitopsis pinicola
( Brown Crumbly Rot )Fusarium oxysporum
( Fusarium Root Rot )Ganoderma applanatum
( White Mottled Rot )Gnathotrichus sulcatus
( Ambrosia Beetles )Herpotrichia juniperi
( Brown Felt Blight )Heterobasidion annosum
( Annosus Root Rot and Butt Rot )Hylobius warreni
( Warren's Root-Collar Weevil )Hyphantria cunea
( Fall Webworm )Hypodermella laricis
( Larch Needle Blight )Inonotus tomentosus
( Tomentosus Root Disease )Isthmiella crepidiformis
( Isthmiella Needle Blight of Spruce )Isthmiella spp.
( Isthmiella Needle Blight )Lambdina fiscellaria
( Western Hemlock Looper )Leptocorus trivittatus
( Boxelder Bug )Leptographium wageneri
( Black Stain Root Disease )Leptomelanconium pinicola
( Leptomelanconium Needle Blight of Pine )Leucoma salicis
( Satin Moth )Leucostoma kunzei
( Cytospora Canker of Spruce )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 )Lymantria dispar
( Gypsy Moth )Malacosoma californicum
( Northern Tent Caterpillar )Malacosoma disstria
( Forest Tent Caterpillar )Melampsora spp.
( Melampsora Foliage Rusts )
Melampsorella caryophyllacearum
( Fir Broom Rust )Melanolophia imitata
( Green-striped Forest Looper )Meria laricis
( Larch Needle Cast )Mindarus abietinus
( Balsam Twig Aphid )Nepytia freemani
( Western False Hemlock Looper )Oligonychus ununguis
( Spruce Spider Mite )Orgyia pseudotsuga
( Douglas-fir Tussock Moth )Petrova albicapitana
( Northern Pitch Twig Moth )Phacidium abietis
( Snow Blight )Phellinus pini
( Red Ring Rot )Phellinus tremulae
( Aspen Trunk Rot )Phellinus weirii
( Phellinus (Poria) weirii Root Rot )Pineus spp.
( Adelgids )Pissodes strobi
( Spruce Weevil )Pissodes terminalis
( Lodgepole Terminal Weevil )Pristiphora erichsonii
( Larch Sawfly )Pucciniastrum spp.
( Fir Needle Rusts )Rhabdocline pseudotsugae
( Douglas Fir Needle Blight )Rhizina undulata
( Rhizina Root Rot )Rhyacionia buoliana
( European Pine Shoot Moth )Scirrhia pini
( Red Band Needle Blight )Scolytus spp.
( Engraver Beetles )Stereum sanguinolentum
( Red Heart Rot )Synanthedon sequoiae
( Sequoia Pitch Moth )Trypodendron lineatum
( Ambrosia Beetle )Uredinopsis spp.
( Fir Needle Rusts )Venturia spp.
( Poplar Shoot Blights )Verticicladiella spp.
( Black Stain Root Disease )Virgella robusta
( True Fir Blights )