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Colorado State University is one of our nation's leading research universities with world-class research in infectious disease, atmospheric science, clean energy technologies, and environmental science. It was founded in 1870 as the Colorado Agricultural College, six years before the Colorado Territory became a state. Colorado State University, located in Fort Collins, Colorado, is situated on nearly 5,000 acres of land, including the main campus, a foothills campus, an agricultural campus, and a mountain campus (Pingree Park). Colorado State also has 4,600 acres for research centers, Cooperative Extension offices, and Colorado State Forest Service stations. |
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| 294 Images of 76 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5495183 | essigella aphids | Essigella spp. | adults and nymphs on Austrian pine foliage |
| 5495186 | giant conifer aphids | Cinara spp. | Giant conifer aphid infestation on blue spruce |
| 5495187 | giant conifer aphids | Cinara spp. | Giant conifer aphid infestation on blue spruce |
| 5495188 | giant conifer aphids | Cinara spp. | |
| 5490303 | Ips engraver beetles | Ips spp. | Tops of ponderosa pine killed by ips beetles |
| 5490304 | Ips engraver beetles | Ips spp. | Tops of ponderosa pine killed by ips beetles |
| 5490305 | Ips engraver beetles | Ips spp. | Tops of ponderosa pine killed by ips beetles |
| 5490334 | mountain pine beetle | Dendroctonus ponderosae | Verbenone sachets used to deter colonization of mountain pine beetle |
| 5488748 | kauri | Agathis australis | Kauri gum flowing from wound |
| 5488749 | kauri | Agathis australis | Kauri gum flowing from wound |
| 5488758 | kauri | Agathis australis | Lower canopy of kauri tree |
| 5490369 | mountain pine beetle | Dendroctonus ponderosae | Blue stain associated with mountain pine beetle |
| 5490370 | mountain pine beetle | Dendroctonus ponderosae | Pitch out of adult beetle |
| 5490371 | mountain pine beetle | Dendroctonus ponderosae | Galleries exposed because of debarking by woodpeckers |
| 5490372 | mountain pine beetle | Dendroctonus ponderosae | Galleries revealed because of debarking by woodpeckers |
| 5490373 | woodpeckers | Wood chips at base of tree produced by woodpeckers feeding on mountain pine beetle | |
| 5490374 | mountain pine beetle | Dendroctonus ponderosae | Verbenone sachets used to repel oviposition |
| 5490375 | mountain pine beetle | Dendroctonus ponderosae | Campground closed during activities (tree removal, insecticide spraying) related to mountain pine beetle management. |
| 5490378 | mountain pine beetle | Dendroctonus ponderosae | Campground closed during activities(tree removal, insecticide spraying) related to mountain pine beetle management |
| 5490379 | mountain pine beetle | Dendroctonus ponderosae | Transition area where lodgepole pine and ponderosa pine intersect and are both attacked by mountain pine beetle. |
| 5490383 | spruce mealybug | Puto sandini | |
| 5489772 | Monterey pine | Pinus radiata | Wilding tree following plantation growth of Monterey pine |
| 5489773 | Monterey pine | Pinus radiata | |
| 5489774 | Monterey pine | Pinus radiata | Wilding tree following plantation growth of Monterey pine |
| 5489775 | Monterey pine | Pinus radiata | Old stand of Monterey pine growing near Wellington |
| 5489776 | Monterey pine | Pinus radiata | Old stand of Monterey pine growing near Wellington |
| 5489777 | Monterey pine | Pinus radiata | Growing woodlot |
| 5489778 | Monterey pine | Pinus radiata | Monterey pine being used as a hedge |
| 5489779 | Monterey pine | Pinus radiata | Trunk of mature Monterey pine |
| 5489780 | Monterey pine | Pinus radiata | |
| 5489781 | Monterey pine | Pinus radiata | Wood lot of Monterey pine growing near Golden Bay. |
| 5489782 | Monterey pine | Pinus radiata | Wood lot of Monterey pine. This area, as was most of New Zealand, was forested before human settlement. |
| 5489784 | Monterey pine | Pinus radiata | Wilding Monterey pine killed by Department of Conservation in woodland restoration. |
| 5489785 | Monterey pine | Pinus radiata | Wilding Monterey pine killed by Department of Conservation in woodland restoration. |
| 5489670 | Monterey cypress | Cupressus macrocarpa | Hedge after trimming with bladed mower |
| 5489671 | Monterey cypress | Cupressus macrocarpa | Hedge trimmed under power line |
| 5489672 | pruning (general) | Road crew trimming hedge near power line. | |
| 5489673 | Monterey cypress | Cupressus macrocarpa | |
| 5489674 | Monterey cypress | Cupressus macrocarpa | Young trees lined out for windbreak hedge |
| 5489675 | Monterey cypress | Cupressus macrocarpa | Young trees lined out for windbreak hedge |
| 5489676 | Monterey cypress | Cupressus macrocarpa | grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand |
| 5489677 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This si the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489678 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489642 | Monterey cypress | Cupressus macrocarpa | Large mature tree |
| 5489643 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489644 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489645 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489646 | Monterey cypress | Cupressus macrocarpa | Grown as a hedge. This is the most common hedge species seen in many areas of the South Island of New Zealand. |
| 5489648 | Monterey cypress | Cupressus macrocarpa | This hedge shows evidence of recent shearing. |
| 5489663 | Monterey cypress | Cupressus macrocarpa | Trunk of large mature tree |
| 5445209 | cooley spruce gall adelgid | Adelges cooleyi | Galls on terminals of Engelmann spruce |
| 5445208 | cooley spruce gall adelgid | Adelges cooleyi | Adults swollen with eggs on underside of spruce terminals |
| 5445210 | cooley spruce gall adelgid | Adelges cooleyi | heavy infestation of Engelmann spruce |
| 5445207 | cooley spruce gall adelgid | Adelges cooleyi | Late stage nymphs within spruce gall |
| 5445206 | cooley spruce gall adelgid | Adelges cooleyi | early stage nymphs within spruce galls |
| 5445204 | cooley spruce gall adelgid | Adelges cooleyi | |
| 5445205 | cooley spruce gall adelgid | Adelges cooleyi | with eggs |
| 5445203 | cooley spruce gall adelgid | Adelges cooleyi | |
| 5445138 | white pine weevil | Pissodes strobi | terminal of blue spruce killed by white pine |
| 5445136 | white pine weevil | Pissodes strobi | Terminal of blue spruce killed by white pine weevil |
| 5445137 | white pine weevil | Pissodes strobi | Terminal of blue spruce killed by white pine weevil |
| 5445135 | white pine weevil | Pissodes strobi | Terminals of blue spruce repeatedly attacked by white pine weevil |
| 5445134 | white pine weevil | Pissodes strobi | terminals of blue spruce repeatedly attacked by white pine weevil |
| 5443235 | cooley spruce gall adelgid | Adelges cooleyi | Galls in initial stage of opening prior ro disprsal of the Cooley spruce gall adelgids |
| 5443237 | cooley spruce gall adelgid | Adelges cooleyi | Gall broken open to show developing Cooley spruce gall adelgids |
| 5443238 | cooley spruce gall adelgid | Adelges cooleyi | Cross-section of gall with developing Cooley spruce gall adelgids |
| 5443180 | spruce beetle | Dendroctonus rufipennis | Tree mortality along White River in Rio Blanco County. This area was near the epicenter of the massive outbreak of this insect in the late 1940s. Photograph taken July 27, 2011. |
| 5443181 | spruce beetle | Dendroctonus rufipennis | Tree mortality along White River in Rio Blanco County. This area was near the epicenter of the massive outbreak of this insect in the late 1940s. Photograph taken July 27, 2011 |
| 5443183 | spruce beetle | Dendroctonus rufipennis | Tree mortality along White River in Rio Blanco County. This area was near the epicenter of the massive outbreak of this insect in the late 1940s. Photograph taken July 27, 2011 |
| 1325082 | Zimmerman pine moth | Dioryctria zimmermani | pitch mass |
| 1246045 | green lacewings | Chrysoperla spp. | |
| 1325087 | Zimmerman pine moth | Dioryctria zimmermani | |
| 1325002 | pinyon spindlegall midge | Pinyonia edulicola | |
| 1455094 | tiger moth | Lophocampa ingens | |
| 1325021 | cooley spruce gall adelgid | Adelges cooleyi | on Douglas-fir |
| 1325030 | cooley spruce gall adelgid | Adelges cooleyi | |
| 1325022 | cooley spruce gall adelgid | Adelges cooleyi | winged adults emergin from spruce gall |
| 1325023 | cooley spruce gall adelgid | Adelges cooleyi | female with egg mass |
| 1325028 | cooley spruce gall adelgid | Adelges cooleyi | overwintered female on twig |
| 1476126 | weevil | Magdalis spp. | |
| 1246055 | western conifer-seed bug | Leptoglossus occidentalis | with field syptoms from infection |
| 1246054 | conifer sawfly | Zadiprion townsendi | |
| 1326030 | pinyon tip moth | Dioryctria albovittella | Flagging of damaged terminals |
| 1326032 | pinyon tip moth | Dioryctria albovittella | Larva in damaged terminal |
| 1326027 | white pine weevil | Pissodes strobi | Larvae in damaged terminal |
| 1326031 | pinyon tip moth | Dioryctria albovittella | Pupa in damaged terminal |
| 1455159 | blue spruce engraver | Ips hunteri | |
| 1326029 | pinyon tip moth | Dioryctria albovittella | Damage to heavily infested tree |
| 1326058 | blue spruce engraver | Ips hunteri | Crown dieback symptom if infestation |
| 1455025 | spruce needleminer | Taniva albolineana | Needle tying |
| 1246053 | cooley spruce gall adelgid | Adelges cooleyi | Galls on heavily infested tree |
| 1326057 | blue spruce engraver | Ips hunteri | Early crown fading symptom of infestation |
| 1326033 | pinyon tip moth | Dioryctria albovittella | Larva in damaged terminal |
| 1326081 | cooley spruce gall adelgid | Adelges cooleyi | Alate stage emerged from gall |
| 1326021 | white pine weevil | Pissodes strobi | Early stage wilting symptoms |
| 1326060 | blue spruce engraver | Ips hunteri | |
| 1326059 | blue spruce engraver | Ips hunteri | |
| 1325033 | eastern spruce gall adelgid | Adelges abietis | |
| 1326026 | white pine weevil | Pissodes strobi | Damage to terminal |
| 1326022 | white pine weevil | Pissodes strobi | Early stage wilting symptoms on codominant terminals |
| 1326025 | white pine weevil | Pissodes strobi | |
| 1326024 | white pine weevil | Pissodes strobi | Damage to terminal |
| 1326147 | black pineleaf scale | Dynaspidiotus californica | Close up of scales on Blue Spruce. |
| 1325035 | cooley spruce gall adelgid | Adelges cooleyi | on Douglas-fir |
| 5369885 | blue horntail woodwasp | Sirex cyaneus | Adult female |
| 1326023 | white pine weevil | Pissodes strobi | Codominant terminals produced by damage |
| 5369760 | tussock moths | Comparison of gypsy moth (Lymantria dispar) and douglas-fir tussock moth (Orygia pseudotsugata) | |
| 1476087 | giant conifer aphids | Cinara spp. | colony on juniper twig |
| 1476091 | cooley spruce gall adelgid | Adelges cooleyi | overwintered female with eggmass |
| 1476092 | cooley spruce gall adelgid | Adelges cooleyi | mature female on douglas fir needles |
| 5369805 | monarch butterfly | Danaus plexippus | Chrysalis |
| 5369891 | brown felt blight of pines | Neopeckia coulteri | A snow mold, sometimes known as ‘bear wipe’. Photo taken September 4, 2007. The identification of the fungus is speculated since spores were not recovered. However, affected trees were immediately adjacent to similarly infected lodgepole pine. |
| 5369880 | brown felt blight of pines | Neopeckia coulteri | A snow mold, sometimes known as ‘bear wipe’. Photo taken September 4, 2007. The identification of the fungus is speculated since spores were not recovered. However, affected trees were immediately adjacent to similarly infected lodgepole pine. |
| 5369874 | flatheaded pine borer | Phaenops gentilis | A small series collected in Colorado showing range in coloration |
| 5369869 | brown felt blight of pines | Neopeckia coulteri | A snow mold, sometimes known as ‘bear wipe’. Photo taken September 4, 2007. |
| 5369883 | blue horntail woodwasp | Sirex cyaneus | Adult female |
| 5369900 | acorn and nut weevils | Curculio spp. | Adult. Photographed July 7, 2006 |
| 5369902 | brown felt blight of pines | Neopeckia coulteri | A snow mold, sometimes known as ‘bear wipe’. Photo taken September 4, 2007. The identification of the fungus is speculated since spores were not recovered. However, affected trees were immediately adjacent to similarly infected lodgepole pine |
| 5369944 | whitespotted sawyer | Monochamus scutellatus | Male and female that were mating on pile of recently cut lodgepole pine |
| 5369886 | blue horntail woodwasp | Sirex cyaneus | Adult female cleaning antennae |
| 5422131 | pine spider mite | Oligonychus subnudus | Spider mite eggs at base of ponderosa pine needles |
| 5422132 | pine spider mite | Oligonychus subnudus | spider mites and damage to ponderosa pine needles |
| 5422130 | pine spider mite | Oligonychus subnudus | Healthy (left) and spider mite damaged (right) ponderosa pine seedlings |
| 5422128 | pine spider mite | Oligonychus subnudus | Healthy (left) and spider mite damage (right) ponderosa pine seedlings |
| 5422129 | pine spider mite | Oligonychus subnudus | Pondrosa pine seedlings damages by spider mites in nursery planting |
| 5422249 | ponderosa twig moth | Dioryctria ponderosae | collected from Pinyon Pine (Pinus edulis) |
| 5422250 | ponderosa twig moth | Dioryctria ponderosae | collected from collected from Pinyon Pine (Pinus edulis) larva and pupa |
| 5422251 | ponderosa twig moth | Dioryctria ponderosae | collected from Pinyon Pine (Pinus edulis) |
| 5422259 | pinyon needle scale | Matsucoccus acalyptus | nymphs on needles in summer |
| 5382037 | stem decay of black walnut | Phellinus weirianus | Pinyon showing crown thinning and grayish coloration of chronic infestation with pinyon needle scale. |
| 5024025 | long-horned beetle | Arhopalus asperatus | |
| 5408102 | fir broom rust | Melampsorella caryophyllacearum | |
| 5361550 | pine, fir, spruce and larch | Close-up view of bark on a tree in Rocky Mountain Park, Colorado. | |
| 5361551 | pine, fir, spruce and larch | Close-up view of bark on a tree in Rocky Mountain Park, Colorado. | |
| 5366670 | Scleroderris canker of western firs | Grovesiella abieticola | Apothecia of Scleroderris canker on a subalpine fir. |
| 5366669 | Scleroderris canker of western firs | Grovesiella abieticola | Evidence of Scleroderris canker on a twig of subalpine fir. |
| 5366668 | Scleroderris canker of western firs | Grovesiella abieticola | Scleroderris canker on a branch of subalpine fir. |
| 5361549 | ponderosa pine | Pinus ponderosa | Close-up view of the bark on a ponderosa pine in Rocky Mountain National Park. |
| 5382172 | mountain pine beetle | Dendroctonus ponderosae | Female in gallery with eggs |
| 5382173 | banded elm bark beetle | Scolytus schevyrewi | Dead adult in gallery with larval tunneling being initiated. |
| 5382164 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tubes |
| 5382165 | mountain pine beetle | Dendroctonus ponderosae | Adult killed in “pitch-out” of ponderosa pine. |
| 5382166 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tubes |
| 5382167 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tubes |
| 5382168 | mountain pine beetle | Dendroctonus ponderosae | Adult excavating tunnel. Although this tree is still producing pitch, it has been heavily attacked by mountain pine beetle, and this adult beetle is excavating a larval gallery, treading the oozing pitch. |
| 5382169 | mountain pine beetle | Dendroctonus ponderosae | Adult excavating tunnel. Although this tree is still producing pitch, it has been heavily attacked by mountain pine beetle, and this adult beetle is excavating a larval gallery, treading the oozing pitch. |
| 5382170 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tube |
| 5382171 | mountain pine beetle | Dendroctonus ponderosae | Adult killed in “pitch-out” of ponderosa pine |
| 5382162 | mountain pine beetle | Dendroctonus ponderosae | Female in gallery with eggs |
| 5382132 | scarab beetle | Phyllophaga falsa | Adult feeding injury to pinyon foliage. Photo taken August 19, 2008. |
| 5382133 | scarab beetle | Phyllophaga falsa | Adult feeding injury to pinyon foliage. Photo taken August 19, 2008 |
| 5382129 | scarab beetle | Phyllophaga falsa | Adult feeding injury to pinyon foliage. Photo taken August 19, 2008 |
| 5382130 | scarab beetle | Phyllophaga falsa | Adult feeding injury to pinyon foliage. Photo taken August 19, 2008. |
| 5382107 | pine catkin sawflies | Xyela spp. | Larvae were found dropping out of trees in large numbers following consumption of staminate flowers. |
| 5382108 | pine catkin sawflies | Xyela spp. | Larvae were found dropping out of trees in large numbers following consumption of staminate flowers. |
| 5382045 | cedar bark beetles | Phloeosinus spp. | Twig die-back from maturation feeding by adult cedar bark beetles. |
| 5382042 | cedar bark beetles | Phloeosinus spp. | Twig die-back from maturation feeding by adult cedar bark beetles. |
| 5382043 | cedar bark beetles | Phloeosinus spp. | Twig die-back from maturation feeding by adult cedar bark beetle. The opening to the feeding site is at the center of the picture. |
| 5382044 | cedar bark beetles | Phloeosinus spp. | Twig die-back from maturation feeding by adult cedar bark beetle. The area of the feeding site has been cut away and exposed. |
| 5382041 | pinyon needle scale | Matsucoccus acalyptus | Young scales settled between needles. Photograph taken July 13, 2008 from scales infesting pinyon. |
| 5382038 | pinyon needle scale | Matsucoccus acalyptus | Pinyon showing crown thinning and grayish coloration of chronic infestation with pinyon needle scale. |
| 5382039 | pinyon needle scale | Matsucoccus acalyptus | Pinyon showing crown thinning and grayish coloration of chronic infestation with pinyon needle scale. |
| 5382040 | pinyon needle scale | Matsucoccus acalyptus | Pinyon showing crown thinning and grayish coloration of chronic infestation with pinyon needle scale. |
| 5382083 | pinyon tip moth | Dioryctria albovittella | |
| 5366989 | comandra blister rust | Cronartium comandrae | Signs of comandra rust (Cronartium comandrae), exposed by squirrels, under the bark of a lodgepole pine. |
| 5369843 | brown felt blight of pines | Neopeckia coulteri | a snow mold, sometimes known as 'bear wipe'. Photo taken September 4, 2007 at Rabbit Ears' Pass in Routt County, Colorado |
| 5369935 | fall webworm | Hyphantria cunea | Extensive infestation with webbing covering trunk |
| 5369924 | fall webworm | Hyphantria cunea | Extensive infestation with webbing covering trunk |
| 5369884 | blue horntail woodwasp | Sirex cyaneus | Adult female |
| 5369777 | hackberry nipplegall maker | Pachypsylla celtidismamma | Cast skins following emergence of adults from galls in September |
| 5369766 | hackberry nipplegall maker | Pachypsylla celtidismamma | Cast skins following emergence of adults from galls in September |
| 5369755 | poplar rust | Melampsora medusae | Yellowish uredia fruiting bodies are on the underside of the leaf. |
| 5369749 | cooley spruce gall adelgid | Adelges cooleyi | Dred galls on Colorado blue spruce |
| 5369748 | cooley spruce gall adelgid | Adelges cooleyi | Infestation on Douglas-fir cone |
| 5369732 | brown felt blight of pines | Neopeckia coulteri | A snow mold, sometimes known as 'bear wipe'. Photo taken September 4, 2007 at Rabbit Ears' Pass in Routt County, Colorado |
| 5361577 | ponderosa pine | Pinus ponderosa | Close-up view of foliage and developing cones on a ponderosa pine, Rocky Mountain National Park. |
| 5366943 | indian paint fungus | Echinodontium tinctorium | Conk of Indian paint fungus (Echinodontium tinctorium) on the trunk of a white fir (Abies concolor) in southern Colorado. |
| 5366993 | limb rust | Peridermium filamentosum | Ponderosa pine tree showing evidence of infection with limb rust (Peridermium filamentosum). |
| 5366992 | limb rust | Peridermium filamentosum | Evidence of limb rust (Peridermium filamentosum) on the branch of a ponderosa pine. |
| 5366991 | limb rust | Peridermium filamentosum | Evidence of limb rust (Peridermium filamentosum) on the limb of a ponderosa pine. |
| 5366990 | comandra blister rust | Cronartium comandrae | "Spike top" symptom of comandra rust (Cronartium comandrae) in a lodgepole pine. |
| 5366988 | comandra blister rust | Cronartium comandrae | Signs of comandra rust (Cronartium comandrae) on the limb of a lodgepole pine. |
| 5366987 | comandra blister rust | Cronartium comandrae | Signs of comandra rust (Cronartium comandrae) on the trunk of a lodgepole pine. |
| 5366986 | comandra blister rust | Cronartium comandrae | Signs of comandra rust (Cronartium comandrae) on the trunk of a pine. |
| 5366985 | comandra blister rust | Cronartium comandrae | Comandra plant showing signs of comandra blister rust (Cronartium comandrae), which affects pines. |
| 5366984 | comandra blister rust | Cronartium comandrae | Comandra plant showing signs of comandra blister rust (Cronartium comandrae), which affects pines. |
| 5366983 | comandra blister rust | Cronartium comandrae | Comandra plant showing signs of comandra blister rust (Cronartium comandrae), which affects pines. |
| 5366982 | white pine blister rust | Cronartium ribicola | Signs of white pine blister rust (Cronartium ribicola) on the trunk of a sugar pine. |
| 5366981 | white pine blister rust | Cronartium ribicola | Signs of white pine blister rust (Cronartium ribicola) on a branch of limber pine. |
| 5366980 | white pine blister rust | Cronartium ribicola | Signs of white pine blister rust (Cronartium ribicola) on a branch of limber pine. |
| 5366977 | fir broom rust | Melampsorella caryophyllacearum | Fir tree showing characteristic symptoms of fir broom rust (Melampsorella caryophyllacearum). |
| 5366976 | spruce broom rust | Chrysomyxa arctostaphyli | Spruce tree showing symptoms of spruce broom rust, Chrysomyxa arctostaphyli. |
| 5366975 | spruce broom rust | Chrysomyxa arctostaphyli | Spruce trees exhibiting symptoms of spruce broom rust, Chrysomyxa arctostaphyli. |
| 5366966 | western gall rust | Endocronartium harknessii | Pine tree in a plantation showing symptoms of western gall rust. |
| 5366965 | western gall rust | Endocronartium harknessii | Hip canker of western gall rust (Endocronartium harknessii) on a lodgepole pine. |
| 5366961 | Gynosporanium rusts | Gymnosporangium spp. | Telia of Gymnosporangium rust (Gymnosporangium sp.) on la juniper. |
| 5366956 | Gynosporanium rusts | Gymnosporangium spp. | Witches' brooms in a juniper, caused by a rust (Gymnosporangium sp.). |
| 5366954 | Gynosporanium rusts | Gymnosporangium spp. | Juniper tree with witches' broom caused by juniper broom rust. |
| 5366953 | juniper broom rust | Gymnosporangium speciosum | Symptoms of orange gall rust (Gymnosporangium speciosum) on a juniper. |
| 5366952 | juniper broom rust | Gymnosporangium speciosum | Orange gall rust (Gymnosporangium speciosum) on a juniper. |
| 5366936 | laminated root disease | Phellinus weirii | Ectotrophic mycelium of the root disease Phellinus weirii, which causes decay in conifer trees. |
| 5367247 | crown gall | Rhizobium radiobacter | Juniper seedling afflicted with crown gall (Agrobacterium tumefaciens). |
| 5357475 | eastern pine gall rust | Cronartium quercuum | Ponderosa pine showing symptoms of eastern pine gall rust caused by the fungus Cronatium quercuum. |
| 5357473 | cedar-apple rust | Gymnosporangium juniperi-virginianae | Rust galls on a cedar tree serving as an alternate host to the cedar-apple rust fungus Gymnosporangium juniperi-virginianae. |
| 5357472 | cedar-apple rust | Gymnosporangium juniperi-virginianae | Rust galls on a cedar tree serving as an alternate host to the cedar-apple rust fungus Gymnosporangium juniperi-virginianae. |
| 5367227 | juniper mistletoe | Phoradendron juniperinum | Juniper mistletoe (Phoradendron juniperum), a true mistletoe, growing in a juniper tree. |
| 5367226 | juniper mistletoe | Phoradendron juniperinum | Juniper mistletoe (Phoradendron juniperum), a true mistletoe, growing in a juniper tree. |
| 5367225 | juniper mistletoe | Phoradendron juniperinum | Juniper mistletoe (Phoradendron juniperum), a true mistletoe, growing in a juniper tree. |
| 5367224 | juniper mistletoe | Phoradendron juniperinum | Juniper mistletoe (Phoradendron juniperum), a true mistletoe, growing in a juniper tree. |
| 5367222 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) on a limber pine. |
| 5367221 | dwarf mistletoes | Arceuthobium spp. | Lodgepole pine trees infected with dwarf mistletoe (Arceuthobium sp.). |
| 5367220 | dwarf mistletoes | Arceuthobium spp. | Close-up view of dwarf mistletoe (Arceuthobium sp.) on a lodgepole pine. |
| 5367219 | dwarf mistletoes | Arceuthobium spp. | Lodgepole pine trees infected with dwarf mistletoe (Arceuthobium sp.). |
| 5367218 | dwarf mistletoes | Arceuthobium spp. | Close-up view of dwarf mistletoe (Arceuthobium sp.) on a ponderosa pine. |
| 5367217 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) on a ponderosa pine. |
| 5367216 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) on a ponderosa pine. |
| 5367214 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) on a white pine. |
| 5367198 | black stain root disease | Ophiostoma wageneri | Black stain (Leptographium wageneri) fungus on the root of a pinyon pine. |
| 5367199 | black stain root disease | Ophiostoma wageneri | Black stain (Leptographium wageneri) fungus under the bark of a pinyon pine |
| 5367200 | black stain root disease | Ophiostoma wageneri | Black stain (Leptographium wageneri) fungus on the root of a pinyon pine. |
| 5367201 | black stain root disease | Ophiostoma wageneri | Pinyon pine showing severe symptoms of infection with black stain (Leptographium wageneri) fungus. |
| 5367209 | pinyon dwarf mistletoe | Arceuthobium divaricatum | Pinyon pines infected with dwarf mistletoe (Arceuthobium divaricatum). |
| 5367210 | pinyon dwarf mistletoe | Arceuthobium divaricatum | Dwarf mistletoe (Arceuthobium divaricatum) on pinyon pine. |
| 5367208 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) and Cytospora canker (Cytospora sp.) on a white fir. |
| 5367207 | dwarf mistletoes | Arceuthobium spp. | Dwarf mistletoe (Arceuthobium sp.) and Cytospora canker (Cytospora sp.) on a white fir. |
| 5367197 | annosum root disease | Heterobasidion annosum | Basidiocarps of annosum root rot (Heterobasidion annosum) on a fir. |
| 5367196 | Armillaria root rots | Armillaria spp. | White fir (Abies concolor) trees showing symptoms of either armillaria (Armillaria sp.) or annosum (Heterobasidion annosum) root rot. |
| 5367194 | annosum root disease | Heterobasidion annosum | Annosum stain (Heterobasidion annosum) in a cross-section of wood. |
| 5367193 | annosum root disease | Heterobasidion annosum | Basidiocarp of annosum root rot (Heterobasidion annosum). |
| 5367191 | Schweinitzii root and butt disease | Phaeolus schweinitzii | Basidiocarp of velvet top fungus (Phaeolus schweinitzii) from a conifer tree. |
| 5367190 | Schweinitzii root and butt disease | Phaeolus schweinitzii | Basidiocarp of velvet top fungus (Phaeolus schweinitzii) on a conifer tree. |
| 5367188 | Armillaria root rots | Armillaria spp. | Mycelial fans of armillaria (Armillaria sp.) under the bark of a conifer tree. |
| 5367187 | Armillaria root rots | Armillaria spp. | Mycelial fans of armillaria (Armillaria sp.) under the bark of a conifer tree. |
| 5367186 | Armillaria root rots | Armillaria spp. | Ponderosa pine trees showing symptoms of infection with armillaria root rot (Armillaria sp.). |
| 5366474 | frost and winter injury (general) | Winter injury to conifers at timberline. | |
| 5366754 | Armillaria root rots | Armillaria spp. | Mushroom and mycelial fan characteristic of armillaria root rot (Armillaria sp.) in a conifer tree. |
| 5366751 | Armillaria root rots | Armillaria spp. | Subalpine fir (Abies lasiocarpa) showing symptoms of armillaria root rot (Armillaria sp.). |
| 5366750 | Armillaria root rots | Armillaria spp. | Ponderosa pine forest (Pinus ponderosa) with trees showing symptoms of armillaria root rot (Armillaria sp.). |
| 5366749 | Armillaria root rots | Armillaria spp. | Mycelial fans of armillaria root rot (Armillaria sp.) under the bark of a ponderosa pine (Pinus ponderosa). |
| 5366748 | Armillaria root rots | Armillaria spp. | Mycelial fans of armillaria root rot (Armillaria sp.) under the bark of a ponderosa pine (Pinus ponderosa). |
| 5366746 | Armillaria root rots | Armillaria spp. | Young ponderosa pine trees (Pinus ponderosa) dying due to infection with armillaria root rot (Armillaria sp.). |
| 5366745 | Armillaria root rots | Armillaria spp. | Ponderosa pine forest (Pinus ponderosa) with trees showing symptoms of armillaria root rot (Armillaria sp.). |
| 5366720 | Cytospora cankers | Cytospora spp. | Symptoms of Cytospora canker (Cytospora sp.) on the branch of a spruce. |
| 5366963 | Gynosporanium rusts | Gymnosporangium spp. | Telia of rust (Gymnosporangium sp.) on a juniper twig. |
| 5303006 | red turpentine beetle | Dendroctonus valens | |
| 5303007 | red turpentine beetle | Dendroctonus valens | |
| 5303092 | mountain pine beetle | Dendroctonus ponderosae | Recently killed and fading lodgepole pine. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303093 | mountain pine beetle | Dendroctonus ponderosae | Recently killed and fading lodgepole pine. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303094 | mountain pine beetle | Dendroctonus ponderosae | Recently killed and fading lodgepole pine. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303095 | mountain pine beetle | Dendroctonus ponderosae | Recently killed and fading lodgepole pine. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303096 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tubes produced within 6 weeks. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303097 | mountain pine beetle | Dendroctonus ponderosae | Old pitch tubes produced previous year. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303098 | mountain pine beetle | Dendroctonus ponderosae | Fresh pitch tubes produced within 6 weeks. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5303100 | mountain pine beetle | Dendroctonus ponderosae | Old pitch tubes produced previous year. Rabbit Ears’ Pass, Routt County, Colorado. September 3, 2007 |
| 5188003 | pine leaf adelgid | Pineus pinifoliae | Aphids within gall |
| 5188004 | pine leaf adelgid | Pineus pinifoliae | Old gall |
| 5188005 | pine leaf adelgid | Pineus pinifoliae | Current season gall |
| 5084034 | pinyon tip moth | Dioryctria albovittella | frass at opening near larval tunnel in bud on pinyon |
| 5084035 | pinyon tip moth | Dioryctria albovittella | entrance wound on pinyon exposed with frass removed |
| 5084036 | pinyon tip moth | Dioryctria albovittella | larva exposed within pinyon bud |
| 5084037 | pinyon tip moth | Dioryctria albovittella | larva exposed within pinyon bud |
| 5082082 | ponderosa twig moth | Dioryctria ponderosae | larvae exposed from pitch mass on branch of pinyon |
| 5082085 | mountain pine beetle | Dendroctonus ponderosae | pitch out that successfully killed adult attempting to tunnel |
| 5082086 | powdery juniper aphid | Cinara pulverulens | colony on juniper twig |
| 5082087 | mountain pine beetle | Dendroctonus ponderosae | dead adult in pitch out produced in tree defense |
| 5024064 | western conifer-seed bug | Leptoglossus occidentalis | |
| 5024065 | western conifer-seed bug | Leptoglossus occidentalis | |
| 5024027 | whitespotted sawyer | Monochamus scutellatus | |
| 5024029 | spotted pine sawyer | Monochamus clamator | |
| 5024022 | pine needle scale | Chionaspis pinifoliae | heavy infestation |
| 5024023 | pine needle scale | Chionaspis pinifoliae | heavy infestation |
| 1455160 | blue spruce engraver | Ips hunteri | Adults on penny |
| 1246008 | Zimmerman pine moth | Dioryctria zimmermani | |
| 1326144 | pinyon needle scale | Matsucoccus acalyptus | Old scale exuviae on older needles on Pinyon. |
| 1326145 | pinyon needle scale | Matsucoccus acalyptus | "Bean stage" exuviae on needles of Pinyon. |
| 1326146 | black pineleaf scale | Dynaspidiotus californica | Scales on Blue Spruce needles. |
| 1325083 | spotted pine sawyer | Monochamus clamator | |
| 1325086 | ponderosa twig moth | Dioryctria ponderosae | larva in pitch mass |
| 1326028 | white pine weevil | Pissodes strobi | Chip cocoons in damaged terminal |
| 1325090 | ponderosa twig moth | Dioryctria ponderosae | in cavity |
| 1325036 | cooley spruce gall adelgid | Adelges cooleyi | newly hatched nymphs settled at base of newly emerging spruce needles |
| 1325040 | pine leaf adelgid | Pineus pinifoliae | galls on spruce |
| 1325061 | juniper tip midge | Oligotrophus betheli | on Rocky Mountain juniper |
| 1325034 | cooley spruce gall adelgid | Adelges cooleyi | nymphs and wax-coated honeydew droplets within gall |
| 1325031 | cooley spruce gall adelgid | Adelges cooleyi | needle twisting associated with Douglas-fir |
| 1325032 | cooley spruce gall adelgid | Adelges cooleyi | |
| 1325001 | pinyon spindlegall midge | Pinyonia edulicola | emerging from galls |
| 1325029 | cooley spruce gall adelgid | Adelges cooleyi | overwintering form in late winter |
| 1325003 | pinyon spindlegall midge | Pinyonia edulicola | |
| 1325004 | pinyon spindlegall midge | Pinyonia edulicola | |
| 1325024 | cooley spruce gall adelgid | Adelges cooleyi | overwintered female on twig |
| 1325025 | cooley spruce gall adelgid | Adelges cooleyi | symptoms of injury within week of initial infestation of terminal growth |
| 1325026 | cooley spruce gall adelgid | Adelges cooleyi | within spruce gall |
| 1325027 | cooley spruce gall adelgid | Adelges cooleyi | winged adults emerging from spruce gall |
