| 1361160 |
Cytospora cankers |
Cytospora spp. |
Sunken lesions |
| 5372376 |
lichen |
Strigula smaragdula |
on ivy (Hedera spp.), lichenized |
| 5337060 |
unknown |
|
Unknown Problem |
| 5371997 |
Cercospora fungus |
Cercospora antipus |
|
| 5367244 |
bacterial wetwood |
Enterobacter nimipressuralis |
Cottonwood tree showing symptoms of infection with bacterial wetwood. |
| 1473242 |
robustus conk |
Phellinus robustus |
indistinct conk nearly hidden in upper righ seam |
| 5366461 |
bacterial gummosis |
Pseudomonas syringae |
Trunk of a Russian olive tree with gummosis, symptomatic of a variety of diseases or abiotic stresses. |
| 1473047 |
southwestern white-spored gall rust |
Peridermium (An undescribed species) |
White spores, highly contagious local distribution, separation of outer bark gives galls a 'collared' feature; when photo taken it was recognized that this rust has white spores and resembles P. harnessii. DNA data suggests these rusts in SW should be recognized as distinct taxa but not yet formally described. A species description and valid scientific name is still pending. Mycologia, 90(2), 1998, pp244-257. http://www.jstor.org/stable/3761300 |
| 5356774 |
X-disease |
Phytoplasma MLO |
Symptoms of "Droopy Aspen," caused by an unknown phytoplasmic agent. |
| 5366438 |
powdery mildew |
Sphaerotheca phytoptophila |
Witches' brooms in hackberry trees afflicted with powdery mildew (Sphaerotheca phytotophila). |
| 5366829 |
Douglas-fir needlecast |
Rhabdocline pseudotsugae |
Close-up view of Douglas-fir needles showing symptoms of infection with Douglas-fir needlecast fungus (Rhabdocline pseudotsugae). |
| 5366825 |
Elytroderma needle cast of pine |
Elytroderma deformans |
Witches broom on ponderosa pine (Pinus ponderosa) caused by Elytroderma needle cast fungus (Elytroderma deformans). |
| 5366816 |
shepherd's crook leaf and shoot blight |
Venturia tremulae |
Young aspen tree showing symptoms of shoot blight (Venturia tremulae). |
| 5366802 |
leaf mold |
Articularia quercina |
Gambel oak with oak witches' broom, caused by the mold Articularia quercina. |
| 5366753 |
Armillaria root rots |
Armillaria spp. |
Pine tree showing symptoms of infection with Armillaria root disease. |
| 5356877 |
nutrient deficiency |
|
Maple tree showing symptoms of iron deficiency. |
| 5366808 |
anthracnose |
Apiognomonia spp. |
Trunk of sycamore tree showing symptoms of infection with anthracnose (Apiognomonia sp.). |
| 5366993 |
limb rust |
Peridermium filamentosum |
Ponderosa pine tree showing evidence of infection with limb rust (Peridermium filamentosum). |
| 5366990 |
comandra blister rust |
Cronartium comandrae |
"Spike top" symptom of comandra rust (Cronartium comandrae) in a lodgepole 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. |
| 5366965 |
western gall rust |
Endocronartium harknessii |
Hip canker of western gall rust (Endocronartium harknessii) on a lodgepole pine. |
| 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. |
| 5366935 |
laminated root disease |
Phellinus weirii |
Evidence of laminated root disease (Phellinus weirii) in douglas-fir. |
| 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). |
| 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. |
| 5367219 |
dwarf mistletoes |
Arceuthobium spp. |
Lodgepole pine trees infected with dwarf mistletoe (Arceuthobium sp.). |
| 5367217 |
dwarf mistletoes |
Arceuthobium spp. |
Dwarf mistletoe (Arceuthobium sp.) on a ponderosa 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. |
| 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. |
| 5367186 |
Armillaria root rots |
Armillaria spp. |
Ponderosa pine trees showing symptoms of infection with armillaria root rot (Armillaria sp.). |
| 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. |
| 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. |
| 5366794 |
Marssonina blight of poplar |
Marssonina populi |
Marssonina blight (Marssonina populi) on leaves of an aspen tree. |
| 5366788 |
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.). |
| 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. |
| 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). |
| 5366734 |
Dothiora fungus |
Dothiora polyspora |
Twigs of an aspen tree showing symptoms of infection with Dothiora canker (Dothiora polyspora). |
| 5366729 |
Cytospora cankers |
Cytospora spp. |
Symptoms of Cytospora canker (Cytospora sp.) on the limbs of a cottonwood tree (Populus sp.). |
| 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. |
| 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). |
| 5366710 |
Thyronectria canker |
Thyronectria austroamericana |
Symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree. |
| 5366706 |
Thyronectria canker |
Thyronectria austroamericana |
Symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree. |
| 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). |
| 5366680 |
Hypoxylon canker of aspen |
Entoleuca mammata |
Symptoms 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. |
| 1473170 |
Cryptosphaeria canker |
Cryptosphaeria ligniota |
photo taken in 1973 |
| 1473017 |
root rot |
Phellinus hartigii |
decay of Tree 177 |
| 1473243 |
robustus conk |
Phellinus robustus |
conk in seam and hollow at junction of arms |
| 5028072 |
blue stain |
Chlorociboria aeruginascens |
This fungus causes a blue-green stain in wood. It is not related to the usual blue-stain fungi (Ceratocystis and allies). |
| 5028073 |
blue stain |
Chlorociboria aeruginascens |
Blue-green stain characteristic of that caused by this species. |
| 5033043 |
blue stain |
Chlorociboria aeruginascens |
|
| 5033044 |
blue stain |
Chlorociboria aeruginascens |
|
| 4825027 |
Neonectria canker |
Neonectria galligena |
Hypertrophied bark in crown. |
