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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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| 213 Images of 71 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5369840 | white apple leafhopper | Typhlocyba pomaria | Nymphal skin |
| 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. | |
| 5361141 | fall color | Fall foliage in Rocky Mountain National Park, Colorado. | |
| 5361142 | fall color | Fall foliage in Rocky Mountain National Park, Colorado. | |
| 5365739 | deadwood and snags | Tree snag in a lava field - Craters of the Moon National Monument, Idaho. | |
| 5361552 | ponderosa pine | Pinus ponderosa | Close-up view of the bark of a ponderosa pine tree in Rocky Mountain National Park. |
| 5382028 | wasp mantidfly | Climaciella brunnea | Adult feeding (lower right) on black blowfly prey. Two Polistes wasps that it mimics are in this picture to the left. All were found on a willow limb with seeping wetwood. Photograph taken June 12, 2008. |
| 5382029 | wasp mantidfly | Climaciella brunnea | Two adults are feeding (left) on black blowfly prey. Two Polistes wasps (probably Polistes apachus) that it mimics are in this picture to the right. All were found on a willow limb with seeping wetwood. Photograph taken June 12, 2008. |
| 5359482 | pine | Pinus spp. | A scenic view of a mountain valley in Colorado, glimpsed through the branches of a pine tree. |
| 5367244 | bacterial wetwood | Enterobacter nimipressuralis | Cottonwood tree showing symptoms of infection with bacterial wetwood. |
| 5366989 | comandra blister rust | Cronartium comandrae | Signs of comandra rust (Cronartium comandrae), exposed by squirrels, under the bark of a lodgepole pine. |
| 5359403 | beard lichen | Usnea spp. | A tree moss/beard lichen on a tree in a field at Honduras. |
| 5359398 | tropical rainforest | Tropical vegetation in Honduras. | |
| 5359397 | tropical rainforest | Tropical vegetation in Honduras. | |
| 5361541 | lumber and building materials | Sawn end of a log, showing tree rings and cracks - Rocky Mountain National Park, Colorado. | |
| 5361542 | lumber and building materials | Close-up of old wood in a structure in Rocky Mountain National Park, Colorado. | |
| 5361554 | lichen | Moss-like lichen on a piece of old wood in Rocky Mountain National Park, Colorado. | |
| 5361553 | lichen | Moss-like lichen on the bark of a tree in Rocky Mountain National Park, Colorado. | |
| 5366889 | aspen/poplar | Populus spp. | Aspen trees overtaking old mining equipment near Silverthorne, Colorado. |
| 5366887 | aspen/poplar | Populus spp. | Aspens turning color in autumn, Rocky Mountain National Park. |
| 5367324 | mountains | West Creek scenery, Colorado. | |
| 5365741 | *trees | Tree growing inside a crater - Craters of the Moon National Monument, Idaho. | |
| 5361134 | quaking aspen | Populus tremuloides | Water-splattered fallen leaves of aspen - autumn, Rocky Mountain National Park. |
| 5361133 | quaking aspen | Populus tremuloides | Colorful fallen leaves of aspen - autumn, Rocky Mountain National Park. |
| 5360126 | gardens | Section of fern forest at the botanical garden in Medellin, Colombia. | |
| 5360112 | coffee | Coffea spp. | Coffee plantation and a stand of bamboo near Manizales, Colombia. |
| 5359411 | bromeliads | Flowering bromeliad in Honduras. | |
| 5359410 | bromeliads | Bromeliad growing on a tree in the Honduran jungle. | |
| 5359409 | bromeliads | Bromeliads growing in trees in the jungle in Honduras. | |
| 5364150 | nuclear polyhedrosis virus | Nucleopolyhedrovirus N/A | Gypsy moth larva (Lymantria dispar), killed by nuclear polyhedrosis virus (NPV), hanging from a pole. |
| 5366947 | polypore fungi | Polyporus spp. | Polyporus conks growing on a piece of downed wood in the forest. |
| 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. |
| 5366809 | anthracnose | Apiognomonia spp. | Sycamore tree showing defoliation as a result of anthracnose (Apiognomonia sp.). |
| 5366808 | anthracnose | Apiognomonia spp. | Trunk of sycamore tree showing symptoms of infection with anthracnose (Apiognomonia sp.). |
| 5366807 | anthracnose | Apiognomonia spp. | Sycamore leaf showing signs of infection with anthracnose (Apiognomonia sp.). |
| 5366806 | anthracnose | Apiognomonia spp. | Sycamore tree showing defoliation as a result of anthracnose (Apiognomonia sp.). |
| 5366805 | anthracnose | Apiognomonia spp. | Twig blight symptoms of anthracnose (Apiognomonia sp.) on a sycamore. |
| 5366731 | Tubercularia cankers | Tubercularia spp. | Sporodochia fruiting structures of Tubercularia canker on the trunk of a hardwood tree. |
| 5366730 | Tubercularia cankers | Tubercularia spp. | Sporodochia fruiting structures of Tubercularia canker on limbs of a hardwood tree(s). |
| 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. |
| 5366972 | Melampsora rusts | Melampsora spp. | Symptoms of rust infection (Melampsora sp.) in cottonwood. |
| 5366971 | Melampsora rusts | Melampsora spp. | Rust spores (Melampsora sp.) on a cottonwood leaf. |
| 5366970 | Melampsora rusts | Melampsora spp. | Signs of rust spores (Melampsora sp.) on lanceleaf cottonwood. |
| 5366969 | Melampsora rusts | Melampsora spp. | Microscope view of rust spores (Melampsora sp.) from lanceleaf cottonwood. |
| 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. |
| 5366959 | Gynosporanium rusts | Gymnosporangium spp. | Aecia of Gymnosporangium rust (Gymnosporangium sp.) on leaves of a hawthorn. |
| 5366956 | Gynosporanium rusts | Gymnosporangium spp. | Witches' brooms in a juniper, caused by a rust (Gymnosporangium sp.). |
| 5366955 | Gynosporanium rusts | Gymnosporangium spp. | Juniper rust (Gymnosporangium sp.) on its alternate host, serviceberry. |
| 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. |
| 5366941 | indian paint fungus | Echinodontium tinctorium | View of the underside of an Echinodontium tinctorium conk. |
| 5366942 | indian paint fungus | Echinodontium tinctorium | An Echinodontium tinctorium conk. |
| 5366938 | red heart of pine | Phellinus pini | Phellinus pini conk. |
| 5366937 | red heart of pine | Phellinus pini | Phellinus pini conk. |
| 5366936 | laminated root disease | Phellinus weirii | Ectotrophic mycelium of the root disease Phellinus weirii, which causes decay in conifer trees. |
| 5366935 | laminated root disease | Phellinus weirii | Evidence of laminated root disease (Phellinus weirii) in douglas-fir. |
| 5366931 | carbon balls | Daldinia concentrica | Conks of carbon ball fungus (Daldinia concentrica) on aspen. |
| 5366929 | sulfur shelf | Laetiporus sulphureus | Conks of sulfur shelf fungus (Laetiporus sulphureus). |
| 5366928 | sulfur shelf | Laetiporus sulphureus | Conks of sulfur shelf fungus (Laetiporus sulphureus) on a rotting stump. |
| 5366922 | white heartwood rot | Phellinus tremulae | Section of aspen showing decay due to Phellinus tremulae. |
| 5366921 | white heartwood rot | Phellinus tremulae | Conk of Phellinus tremulae on the trunk of an aspen. |
| 5366920 | white heartwood rot | Phellinus tremulae | Conks of Phellinus tremulae on the trunks of aspen trees. |
| 5366919 | oyster mushroom | Pleurotus ostreatus | Oyster mushroom (Pleurotus ostreatus) on the trunk of a boxelder tree (Acer negundo). |
| 5366909 | Trametes wood decay | Trametes hirsuta | Conk of Trametes hirsuta, which causes decay in several species of hardwood trees. |
| 5366908 | Trametes wood decay | Trametes hirsuta | Conk of Trametes hirsuta, which causes decay in several species of hardwood trees. |
| 5367258 | fire blight | Erwinia amylovora | Branch of a crabapple tree symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367256 | fire blight | Erwinia amylovora | Branch of a crabapple tree symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367253 | fire blight | Erwinia amylovora | Branch of a crabapple tree symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367252 | fire blight | Erwinia amylovora | Branch of a crabapple tree symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367251 | fire blight | Erwinia amylovora | Dead branch of crabapple, symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367250 | fire blight | Erwinia amylovora | Twig of a crabapple tree showing symptoms of infection with fire blight (Erwinia amylovora). |
| 5367249 | fire blight | Erwinia amylovora | Dead branch symptomatic of infection with fire blight (Erwinia amylovora). |
| 5367248 | crown gall | Rhizobium radiobacter | Cottonwood tree with a very large crown gall (Agrobacterium tumefaciens) high on the trunk. |
| 5367247 | crown gall | Rhizobium radiobacter | Juniper seedling afflicted with crown gall (Agrobacterium tumefaciens). |
| 5367246 | crown gall | Rhizobium radiobacter | Cottonwood tree afflicted with crown gall (Agrobacterium tumefaciens). |
| 5367245 | crown gall | Rhizobium radiobacter | Cottonwood tree afflicted with crown gall (Agrobacterium tumefaciens). |
| 5367241 | bacterial wetwood | Enterobacter nimipressuralis | Cottonwood tree showing symptoms of infection with bacterial wetwood. |
| 5367240 | bacterial wetwood | Enterobacter nimipressuralis | American elm tree showing evidence of infection with bacterial wetwood, or slime flux. |
| 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. |
| 5367195 | annosum root disease | Heterobasidion annosum | Root rot symptoms in a tree, due to either annosum (Heterobasidion annosum) or Armillaria sp. |
| 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. |
| 5367189 | Armillaria root rots | Armillaria spp. | Rhizomorphs of Armillaria sp. on roots of a 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.). |
| 5367185 | Armillaria root rots | Armillaria spp. | Mycelial fans of armillaria (Armillaria sp.) under the bark of a fir tree. |
| 5367184 | Armillaria root rots | Armillaria spp. | Sign / symptom of armillaria root rot (Armillaria sp.) on the branch of a tree. |
| 5367164 | Road salt or de-icing salt | Salt damage to aspen leaves. | |
| 5366442 | Stigmina fungus | Wilsonomyces carpophilus | Potted chokecherry plant showing symptoms of shothole fungus, Wilsonomyces carpophilus. |
| 5366441 | Stigmina fungus | Wilsonomyces carpophilus | Potted chokecherry plant showing symptoms of shothole fungus, Wilsonomyces carpophilus. |
| 5366834 | brown felt blight | Herpotrichia juniperi | Young spruce tree showing symptoms of brown felt blight, Herpotrichia juniperi. |
| 5366833 | brown felt blight | Herpotrichia juniperi | Spruce tree showing symptoms of brown felt blight, Herpotrichia juniperi. |
| 5366828 | Douglas-fir needlecast | Rhabdocline pseudotsugae | Douglas-fir branch showing symptoms of the needlecast fungus Rhabdocline pseudotsugae. |
| 5366827 | needle cast | Bifusella saccata | Limber pine (Pinus flexilis) afflicted with the needlecast fungus (Hypoderma saccatum). |
| 5366826 | Elytroderma needle cast of pine | Elytroderma deformans | Ponderosa pine with witches' brooms and needlecast symptoms of needle cast fungus of pine (Elytroderma deformans). |
| 5366818 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366817 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366815 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366814 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366813 | shepherd's crook leaf and shoot blight | Venturia tremulae | Aspen tree severely affected by shepherd's crook leaf and shoot blight (Venturia tremulae). |
| 5366812 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366811 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366810 | shepherd's crook leaf and shoot blight | Venturia tremulae | Shepherd's crook leaf and shoot blight (Venturia tremulae) on aspen. |
| 5366796 | Marssonina blight of poplar | Marssonina populi | Close-up view of Marssonina blight (Marssonina populi) on an aspen leaf. |
| 5366795 | Marssonina blight of poplar | Marssonina populi | Marssonina blight (Marssonina populi) on leaves of an aspen tree. |
| 5366792 | Marssonina blight of poplar | Marssonina populi | Microscopic view of the conidia of Marssonina blight (Marssonina populi). |
| 5366793 | Marssonina blight of poplar | Marssonina populi | Microscopic view of the conidia of Marssonina blight (Marssonina populi). |
| 5366790 | Marssonina blight of poplar | Marssonina populi | Close-up view of Marssonina blight (Marssonina populi) on an aspen leaf. |
| 5366791 | Marssonina blight of poplar | Marssonina populi | Close-up view of Marssonina blight (Marssonina populi) on an aspen leaf. |
| 5366794 | Marssonina blight of poplar | Marssonina populi | Marssonina blight (Marssonina populi) on leaves of an aspen tree. |
| 5366789 | ink spot leaf blight | Ciborinia whetzelii | Signs and symptoms of ink spot leaf blight (Ciborinia whetzelii) on an aspen leaf. |
| 5366788 | ink spot leaf blight | Ciborinia whetzelii | Signs and symptoms of ink spot leaf blight (Ciborinia whetzelii) on an aspen leaf. |
| 5366787 | ink spot leaf blight | Ciborinia whetzelii | Signs and symptoms of ink spot leaf blight (Ciborinia whetzelii) on an aspen leaf. |
| 5366786 | ink spot leaf blight | Ciborinia whetzelii | Signs and symptoms of ink spot leaf blight (Ciborinia whetzelii) on an aspen leaf. |
| 5366785 | ink spot leaf blight | Ciborinia whetzelii | Signs and symptoms of ink spot leaf blight (Ciborinia whetzelii) on an aspen leaf. |
| 5366781 | Mycosphaerella fungi | Mycosphaerella spp. | Septoria leaf spot, Mycosphaerella sp. (Septoria sp.), on a cottonwood leaf (Populus sp.). |
| 5366780 | Mycosphaerella fungi | Mycosphaerella spp. | Septoria leaf spot, Mycosphaerella sp. (Septoria sp.). |
| 5366779 | Mycosphaerella fungi | Mycosphaerella spp. | Septoria leaf spot, Mycosphaerella sp. (Septoria sp.), on the leaf of lanceleaf cottonwood (Populus angustifolia). |
| 5366778 | Mycosphaerella fungi | Mycosphaerella spp. | Septoria leaf spot, Mycosphaerella sp. (Septoria sp.), on the leaf of lanceleaf cottonwood (Populus angustifolia). |
| 5366775 | Mycosphaerella fungi | Mycosphaerella spp. | Microscopic view of the conidia of Septoria (Mycosphaerella) species, the causative agent of septoria leaf spot. |
| 5366776 | Mycosphaerella fungi | Mycosphaerella spp. | Microscopic view of the conidia of Septoria (Mycosphaerella) species, the causative agent of septoria leaf spot. |
| 5366761 | mechanical | Aspen tree displaying a condition known as "droopy aspen." The cause is unknown but may be the result of mechanical damage to the roots. | |
| 5366760 | mechanical | Aspen trees displaying a condition known as "droopy aspen." The cause is unknown but may be the result of mechanical damage to the roots. | |
| 5366758 | mechanical | Aspen tree displaying a condition known as "droopy aspen." The cause is unknown but may be the result of mechanical damage to the roots. | |
| 5366755 | Armillaria root rots | Armillaria spp. | Rhizomorphs of armillaria root rot (Armillaria sp.) on an aspen log. |
| 5366746 | Armillaria root rots | Armillaria spp. | Young ponderosa pine trees (Pinus ponderosa) dying due to infection with armillaria root rot (Armillaria sp.). |
| 5366743 | Verticillium wilts | Verticillium spp. | Sapwood of a maple tree showing symptoms of verticillium wilt (Verticillium sp.). |
| 5366737 | Dothiora fungus | Dothiora polyspora | Aspen branch showing symptoms of both Dothiora canker (Dothiora polyspora, on the right) and Cytospora canker (Cytospora sp.). |
| 5366736 | Dothiora fungus | Dothiora polyspora | Twigs of an aspen tree showing symptoms of infection with Dothiora canker (Dothiora polyspora). |
| 5366735 | Dothiora fungus | Dothiora polyspora | Damaged aspen tree showing symptoms of infection with Dothiora canker (Dothiora polyspora). |
| 5366734 | Dothiora fungus | Dothiora polyspora | Twigs of an aspen tree showing symptoms of infection with Dothiora canker (Dothiora polyspora). |
| 5366727 | Cytospora cankers | Cytospora spp. | Tip dieback in an ash tree (Fraxinus sp.), caused by infection with Cytospora canker (Cytospora sp.). |
| 5366729 | Cytospora cankers | Cytospora spp. | Symptoms of Cytospora canker (Cytospora sp.) on the limbs of a cottonwood tree (Populus sp.). |
| 5366728 | Cytospora cankers | Cytospora spp. | View through a microscope of Cytophora sp. spores, the causative agent of Cytospora canker. |
| 5366726 | Cytospora cankers | Cytospora spp. | Cytospora canker (Cytospora sp.) -- spore tendrils emerging from the trunk of a tree. |
| 5366725 | Cytospora cankers | Cytospora spp. | Cytospora canker (Cytospora sp.) -- spore tendrils emerging from the trunk of a tree. |
| 5366724 | Cytospora cankers | Cytospora spp. | Colorful symptoms of Cytospora canker (Cytospora sp.) on the trunk of an aspen tree (Populus tremuloides). |
| 5366723 | Cytospora cankers | Cytospora spp. | Symptoms of Cytospora canker (Cytospora sp.) on the trunk of an alder. |
| 5366722 | Cytospora cankers | Cytospora spp. | Cytospora canker (Cytospora sp.) -- spore tendrils emerging from the trunk of a tree. |
| 5366721 | Cytospora cankers | Cytospora spp. | Symptoms of Cytospora canker (Cytospora sp.) on the branches of three trees. |
| 5366717 | Cytospora cankers | Cytospora spp. | Symptoms of Cytospora canker (Cytospora sp.) on the trunk of an aspen tree (Populus tremuloides). |
| 5366714 | Thyronectria canker | Thyronectria austroamericana | Close-up view of the signs and symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree. |
| 5366710 | Thyronectria canker | Thyronectria austroamericana | Symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree. |
| 5366709 | Thyronectria canker | Thyronectria austroamericana | Cross-section of a honeylocust trunk showing signs of infection with both Thyronectria canker (Thyronectria austro-americana, yellow coloration) and Nectria canker (Nectria cinnabarina, dark coloration). |
| 5366706 | Thyronectria canker | Thyronectria austroamericana | Symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree. |
| 5366708 | Thyronectria canker | Thyronectria austroamericana | Microscopic view of the asci of Thyronectria canker (Thyronectria austro-americana) on honeylocust (Gleditsia triacanthos). |
| 5366696 | corky bark disease | Diplodia tumefaciens | Gall on the side of an aspen trunk (Populus tremuloides) caused by corky bark disease (Diplodia tumefaciens). |
| 5366697 | corky bark disease | Diplodia tumefaciens | Galls on the side of an aspen trunk (Populus tremuloides) caused by corky bark disease (Diplodia tumefaciens). |
| 5366695 | black knot | Apiosporina morbosa | Branches of a chokecherry (Prunus virginiana) showing signs and symptoms of black knot canker (Apiosporina morbosa). |
| 5366694 | black knot | Apiosporina morbosa | Cross-section of the trunk of a chokecherry (Prunus virginiana) showing signs and symptoms of black knot canker (Apiosporina morbosa). |
| 5366692 | black knot | Apiosporina morbosa | Section of a chokecherry branch (Prunus virginiana) showing signs and symptoms of black knot canker (Apiosporina morbosa). |
| 5366690 | Cryptosphaeria canker | Cryptosphaeria ligniota | Signs and symptoms of Cryptosphaeria canker (Cryptosphaeria ligniota) on the trunk of an aspen tree (Populus tremuloides). |
| 5366691 | Cryptosphaeria canker | Cryptosphaeria ligniota | Signs and symptoms of Cryptosphaeria canker (Cryptosphaeria ligniota) on the trunk of an aspen tree (Populus tremuloides). |
| 5366689 | Cryptosphaeria canker | Cryptosphaeria ligniota | Signs and symptoms of Cryptosphaeria canker (Cryptosphaeria ligniota) on the trunk of an aspen tree (Populus tremuloides). |
| 5366687 | Cryptosphaeria canker | Cryptosphaeria ligniota | Signs and symptoms of Cryptosphaeria canker (Cryptosphaeria ligniota) on the trunk of an aspen tree (Populus tremuloides). |
| 5366686 | sooty-bark canker | Encoelia pruinosa | Apothecia of sooty-bark canker (Encoelia pruinosa) on the trunks of aspen trees (Populus tremuloides). |
| 5366685 | sooty-bark canker | Encoelia pruinosa | Signs and symptoms of sooty-bark canker (Encoelia pruinosa) on the trunk of an aspen tree (Populus tremuloides). |
| 5366684 | sooty-bark canker | Encoelia pruinosa | Apothecia of sooty-bark canker (Encoelia pruinosa) on the trunk of an aspen tree (Populus tremuloides). |
| 5366683 | sooty-bark canker | Encoelia pruinosa | Close-up view of signs and symptoms of sooty-bark canker (Encoelia pruinosa) on the trunks of aspen trees (Populus tremuloides). |
| 5366682 | sooty-bark canker | Encoelia pruinosa | Signs and symptoms of sooty-bark canker (Encoelia pruinosa) on the trunk of an aspen tree (Populus tremuloides). |
| 5366681 | sooty-bark canker | Encoelia pruinosa | Close-up view of signs and symptoms of sooty-bark canker (Encoelia pruinosa) on the trunk of an aspen tree (Populus tremuloides). |
| 5366680 | Hypoxylon canker of aspen | Entoleuca mammata | Symptoms of hypoxylon canker (Hypoxylon mammatum) on the trunk of an aspen tree (Populus tremuloides). |
| 5366679 | Hypoxylon canker of aspen | Entoleuca mammata | Close-up view of hypoxylon canker (Hypoxylon mammatum) on the trunk of an aspen tree (Populus tremuloides). |
| 5366678 | Hypoxylon canker of aspen | Entoleuca mammata | Hypoxylon canker (Hypoxylon mammatum) on the trunk of an aspen tree (Populus tremuloides). |
| 5366677 | Hypoxylon canker of aspen | Entoleuca mammata | Hypoxylon canker (Hypoxylon mammatum) on the trunk of an aspen tree (Populus tremuloides). |
| 5366676 | black rot | Ceratocystis fimbriata | Symptom of black canker (Ceratocystis fimbriata) on an aspen tree. |
| 5366672 | black rot | Ceratocystis fimbriata | Black canker (Ceratocystis fimbriata) on an aspen tree. |
| 5366671 | black rot | Ceratocystis fimbriata | Black canker (Ceratocystis fimbriata) on an aspen tree. |
| 5366665 | Endothia fungus | Endothia singularis | Signs and symptoms of Endothia canker (Endothia singularis) on a branch of Gambel oak (Quercus gambelii). |
| 5366664 | Endothia fungus | Endothia singularis | Signs and symptoms of Endothia canker (Endothia singularis) on the branch of a Gambel oak (Quercus gambelii). |
| 5366663 | Endothia fungus | Endothia singularis | Signs and symptoms of Endothia canker (Endothia singularis) on branches of Gambel oak (Quercus gambelii). |
