| 5458129 |
Caliciopsis canker |
Caliciopsis pinea |
Caliciopsis pinea spermagonia on a Pinus strobus branch |
| 1400113 |
chestnut blight or canker |
Cryphonectria parasitica |
Canker on main stem; note dead branch in center of canker, discolored bark, and orange bumps (stroma) breaking through killed bark. |
| 1470127 |
stalactiform blister rust |
Cronartium coleosporioides |
aecia |
| 1406019 |
Diplodia blight |
Sphaeropsis sapinea |
stem canker |
| 4215075 |
cedar-apple rust |
Gymnosporangium juniperi-virginianae |
telia on cedar |
| 1427068 |
sudden oak death |
Phytophthora ramorum |
Dried ooze caused by bleeding from P. ramorum infection on coast live oak. |
| 1467396 |
fir needle cast |
Lirula abietis-concoloris |
hysterothecium (top) and pycnidia (bottom) |
| 0355049 |
pine needle rusts |
Coleosporium spp. |
|
| 1427054 |
sudden oak death |
Phytophthora ramorum |
Canker and zone lines caused by P. ramorum. |
| 1467303 |
comandra blister rust |
Cronartium comandrae |
|
| 4215008 |
Armillaria root rots |
Armillaria spp. |
bioluminescent mycelial fans under bark |
| 2652005 |
western gall rust |
Endocronartium harknessii |
Sporulating aecial gall on shore pine in southeast Alaska |
| 2139064 |
limber pine dwarf mistletoe |
Arceuthobium cyanocarpum |
|
| 0976062 |
white heartwood rot |
Phellinus tremulae |
large conk on tree |
| 0808048 |
Armillaria root rots |
Armillaria spp. |
Mycelial mats on windthrown tree. North Fork John Day Ranger District, Umatilla National Forest, northeastern Oregon |
| 0355061 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Aecia |
| 0355053 |
eastern pine gall rust |
Cronartium quercuum |
aecia |
| 1301078 |
Dutch elm disease |
Ophiostoma ulmi |
Coremia (spore-bearing bodies) of Ophiostoma ulmi in a Scolytus multistriatus gallery |
| 1406056 |
Sirococcus blight of conifers |
Sirococcus conigenus |
|
| 1406052 |
Sirococcus blight of conifers |
Sirococcus conigenus |
|
| 1406072 |
Lophodermium needle casts |
Lophodermium spp. |
|
| 1406069 |
pine needle cast |
Lophodermium pinastri |
|
| 1400098 |
Armillaria root rots |
Armillaria spp. |
Rhizomorphs on dead oak |
| 1400112 |
chestnut blight or canker |
Cryphonectria parasitica |
Lethal canker on main stem, with bark discoloration and orange stroma. |
| 1400114 |
chestnut blight or canker |
Cryphonectria parasitica |
Orange stroma of cryphonectria emerging through bark of canker. |
| 1467269 |
western gall rust |
Endocronartium harknessii |
aecia |
| 1467005 |
limb rust |
Peridermium filamentosum |
aecia |
| 1467011 |
western gall rust |
Endocronartium harknessii |
aecial gall |
| 1467023 |
needle rust |
Coleosporium senecionis |
telial horns |
| 3035091 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
pycnia |
| 3036014 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
closeup of telia |
| 1467025 |
Nectria canker |
Nectria spp. |
sporodochia |
| 1427083 |
sudden oak death |
Phytophthora ramorum |
Zone lines of P. ramorum on coast live oak. |
| 1457022 |
white pine blister rust |
Cronartium ribicola |
Aecial spore stage of white pine blister rust on main stem of a young tree. |
| 1400108 |
Hypoxylon cankers |
Hypoxylon spp. |
Canker (discolored, sunken area on bark) on aspen |
| 1400102 |
Armillaria root rots |
Armillaria spp. |
Armillaria rhizomorph under bark of root on declining (but still alive) aspen. See image #1400103. Nicolet National Forest, Wisconsin. |
| 1442040 |
comandra blister rust |
Cronartium comandrae |
showing aecia |
| 1406070 |
pine needle cast |
Lophodermium pinastri |
|
| 1406068 |
pine needle cast |
Lophodermium nitens |
|
| 0355054 |
eastern pine gall rust |
Cronartium quercuum |
Aecial stage |
| 1467275 |
limb rust |
Peridermium filamentosum |
aecial stage; note "tounge-like" pustules |
| 3035090 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
|
| 1467282 |
stalactiform blister rust |
Cronartium coleosporioides |
aecia on canker |
| 1467286 |
incense cedar broom rust |
Gymnosporangium libocedri |
telial stage |
| 1467265 |
western gall rust |
Endocronartium harknessii |
typical galls on young ponderosa pine |
| 1467309 |
pinyon blister rust |
Cronartium occidentale |
|
| 1241567 |
Rhabdocline needlecasts |
Rhabdocline spp. |
Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 1427069 |
sudden oak death |
Phytophthora ramorum |
Signs of bleeding caused by P. ramorum infection on lichen-covered bark of coast live oak. |
| 0355060 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
close-up view of telia on oak leaves, the alternate host. |
| 1427070 |
sudden oak death |
Phytophthora ramorum |
Residual signs of bleeding caused by P. ramorum infection on bark surface lichens. |
| 0355050 |
pine needle rusts |
Coleosporium spp. |
close-up view on aecia |
| 1406055 |
Sirococcus blight of conifers |
Sirococcus conigenus |
|
| 1241566 |
Rhabdocline needlecasts |
Rhabdocline spp. |
Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 2635026 |
oak wilt |
Ceratocystis fagacearum |
close-up view of fungal mat on peeled stem |
| 3036007 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
gall |
| 5424270 |
oak apple gall |
Amphibolips spp. |
Two galls, one with a exit hole. |
| 5424271 |
oak apple gall |
Amphibolips spp. |
Two galls, one with an exit hole. |
| 5424272 |
oak apple gall |
Amphibolips spp. |
Two galls, one with an exit hole |
| 5061096 |
pine needle rusts |
Coleosporium spp. |
Aecia on needles |
| 5061097 |
pine needle rusts |
Coleosporium spp. |
Aecia on pine needles |
| 5061100 |
pine needle rusts |
Coleosporium spp. |
Aecia on needles |
| 5062001 |
pine needle rusts |
Coleosporium spp. |
Aeica on needles |
| 5062002 |
pine needle rusts |
Coleosporium spp. |
Aecia on needles |
| 1241614 |
lodgepole pine needle cast |
Lophodermella concolor |
Fruiting bodies, produced during bud break, are the same color as the dead needles, giving the needles a warty appearance. |
| 5061098 |
pine needle rusts |
Coleosporium spp. |
Aecia on needles |
| 5061099 |
pine needle rusts |
Coleosporium spp. |
Aecia on needles |
| 1241587 |
larch needle cast |
Hypodermella laricis |
Black dots of fruiting bodies form in midsummer on needles. |
| 2250037 |
Armillaria root rot |
Armillaria solidipes |
mycelial fan under bark at base of tree |
| 1301054 |
Eutypella canker |
Eutypella parasitica |
Eutypella cankers on maple are often colonized by the decay causing fungus Oxyporus populinus. |
| 1241670 |
Armillaria root rot |
Armillaria solidipes |
Cutting away the bark reveals white fan-shaped felts of Armillaria mycelium in the cambium at the root collar. |
| 1467404 |
pine needle cast |
Lophodermium nitens |
black shiny hyserothecia |
| 1467270 |
western gall rust |
Endocronartium harknessii |
atypical elongated galls |
| 1399111 |
Melampsora leaf rust |
Melampsora laricis-populina |
Uredospores on lower leaf surface |
| 1241673 |
Armillaria root rot |
Armillaria solidipes |
Even seedlings have mycellium fans in the root or root collar cambium. |
| 1467383 |
Medusa needle blight |
Davisomycella medusa |
|
| 1241727 |
comandra blister rust |
Cronartium comandrae |
Comandra blister rust sporulating on a young lodgepole stem. |
| 0355051 |
southern cone rust |
Cronartium strobilinum |
Aecia on swollen, infected cone |
| 1400043 |
stem girdling roots |
|
Girdling roots (excavated and painted by Gary Johnson) on Linden tree in image 1400042. |
| 1467384 |
Medusa needle blight |
Davisomycella medusa |
hysterothecia |
| 1467405 |
pine needle cast |
Lophodermium pinastri |
hysterothecia |
| 1399114 |
powdery mildews |
|
on hybrid poplar |
| 1467402 |
needlecast |
Bifusella pini |
hysterothcia (black irregular lines); pycnidia (brown structures); all fruiting structures confined to sorid areas |
| 1467415 |
white pine blister rust |
Cronartium ribicola |
urediospores on Ribes spp. |
| 1467400 |
common snow mold |
Phacidium infestans |
apothecia |
| 1427037 |
Hypoxylon canker |
Annulohypoxylon thouarsianum var. thouarsianum |
a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black. |
| 2635002 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
Rhizomorphs under bark |
| 2250026 |
Armillaria root rot |
Armillaria solidipes |
mycelial fan under bark of young western hemlock |
| 0355052 |
white pine blister rust |
Cronartium ribicola |
Uredia stage on alternate host Ribes |
| 1467397 |
fir needle cast |
Lirula abietis-concoloris |
hysterothecium |
| 1467395 |
fir needle cast |
Lirula abietis-concoloris |
long black hysterothecium along midrib (top) conidia along sulcus on upper surface (bottom) |
| 5058046 |
tar spot |
Rhytisma punctatum |
Sporocarps on leaves |
| 5058047 |
tar spot |
Rhytisma punctatum |
Sporocarps on leaves |
| 5300087 |
eastern tent caterpillar |
Malacosoma americanum |
Tent of eastern tent caterpillar |
| 2141067 |
comandra blister rust |
Cronartium comandrae |
on a seedling |
| 5046023 |
Stigmina leaf spot |
Stigmina lautii |
Fruiting bodies (sporodochia) emerging through stomata |
| 5299020 |
false tinder polypore |
Phellinus igniarius |
Older sporocarp of P. igniarius. |
| 5299021 |
false tinder polypore |
Phellinus igniarius |
Atypical sporocarp of P. igniarius. Orientation of the sporocarp changed when the tree fell. |
| 5299008 |
ash root rot |
Scytinostroma galactinum |
Root rot responsible for windthrow in white ash in northern lower Michigan. |
| 5050080 |
basal cankers |
|
Large oak tree with basal opening and severe decay. |
| 5252015 |
dieback |
|
Large branch dieback in bur oak. |
| 5252022 |
white muscadine disease |
Beauveria bassiana |
Larvae of Scolytus multistriatus killed by the insect pathogen Beauveria bassiana. |
| 5044031 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Shoots of black spruce dwarf mistletoe. |
| 5044032 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Shoots of black spruce dwarf mistletoe. |
| 5038069 |
epicormic branch |
|
Epicormic branches |
| 5051074 |
Eriophyid mite |
|
Eriophyid mites on red maple leaves |
| 5051075 |
Eriophyid mite |
|
Eriophyid mites on silver maple leaves. |
| 5051086 |
Eutypella canker |
Eutypella parasitica |
Black sporocarps of Eutypella parasitica on the surface of a canker on sugar maple. |
| 5038070 |
mossy maple polypore |
Oxyporus populinus |
Sporocarps of Oxyporus populinus fruiting on the surface of a Eutypella canker. Oxyporus is commonly associated with Eutypella cankers. |
| 5051093 |
Eutypella canker |
Eutypella parasitica |
Eutypella parasitica sporocarps (perithecia) on the face of the canker. |
| 5051094 |
Eutypella canker |
Eutypella parasitica |
Sporocarps of Eutypella parasitica on the surface of a canker. |
| 5252032 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Female flowers of black spruce dwarf mistletoe. |
| 5052015 |
cold injury (low temperature) |
|
A sealed-over frost crack. |
| 5038076 |
Scleroderris canker of pine and spruce |
Gremmeniella abietina |
Green stain of wood caused by G. abietina |
| 5052078 |
poor architecture |
|
Maple with numerous accumulated defects. An "ugly" tree. |
| 5052080 |
cracks or splits |
|
A sealed-over crack. |
| 5053020 |
deadwood and snags |
|
Dead spruce near parking lot |
| 5042098 |
white pine blister rust |
Cronartium ribicola |
Aecial sacs of Cronartium ribicola on eastern white pine. |
| 5053011 |
uncorrected lean |
|
Leaning tree near a picnic table. |
| 5053017 |
deadwood and snags |
|
Dead and dying white birch in playground area |
| 5053018 |
deadwood and snags |
|
Dead tree in parking lot |
| 5053023 |
imbedded objects |
|
Fencing embedded in tree. |
| 5053028 |
poor architecture |
|
House with large trees in yard. Multiple large branches arising from a single point (poor architecture). |
| 5053036 |
storm damage (general) |
|
Storm-damaged tree with broken branch. |
| 5053037 |
risk tree |
|
Multiple defects (cracks, decay, poor branch angles) in a yard tree. |
| 5053039 |
storm damage (general) |
|
Storm damage and partial mitigation |
| 5053040 |
uncorrected lean |
|
Leaning tree |
| 5053054 |
risk tree |
|
Large tree with multiple defects, including cracks, decay, dead branches. |
| 5053055 |
deadwood and snags |
|
Tree snag with decay and den hole. Not a hazard because there is no target. |
| 5044077 |
deadwood and snags |
|
Large deaying branch high in a tree. |
| 5044080 |
risk tree |
|
Sealed-over crack with decay. |
| 5044081 |
risk tree |
|
Hazard tree crack with sawdust at base of tree, indicating decay. |
| 5044083 |
exposed roots |
|
Erosion and exposed roots. |
| 5042076 |
Armillaria root rots |
Armillaria spp. |
signs of armillaria visible in recent crack |
| 5037090 |
Eutypella canker |
Eutypella parasitica |
|
| 5044003 |
cracks or splits |
|
Long spiral frost crack. |
| 5050049 |
Cyclaneusma needle cast |
Cyclaneusma minus |
Apothecia on needles of Scot's pine. |
| 5044018 |
deadwood and snags |
|
Dead oak top (tree hazard) |
| 5038036 |
cracks or splits |
|
Dead top with major split. |
| 5050074 |
deadwood and snags |
|
Dead trees in recreation area (tree hazard) |
| 5044019 |
deadwood and snags |
|
Large dead branches |
| 5298021 |
trunk rot |
Pholiota populnea |
Tree with internal decay, and Pholiota destruens fruiting body in cavity. |
| 5298024 |
clinker polypore |
Inonotus obliquus |
Decay and sterile conks produced by Inonotus obliquus. |
| 5298051 |
Armillaria root rots |
Armillaria spp. |
Decay and mycelial wefts on decayed, failed tree caused by Armillaria sp. |
| 5298052 |
Armillaria root rots |
Armillaria spp. |
Broken bole, decay and mycelial wefts caused by Armillaria sp. |
| 5298063 |
deadwood and snags |
|
Large tree with dead wood in crown, multiple burls and decay. Tom Eiber and Peggy Sand in image. |
| 5298067 |
Armillaria root rots |
Armillaria spp. |
Rhizomorphs and mycelial wefts of Armillaria sp. |
| 5298072 |
clinker polypore |
Inonotus obliquus |
Sterile conk of Inonotus obliquues and substantial decay (cross section) |
| 5298074 |
basal wound |
|
Basal wound with discolored wood |
| 5048005 |
ash root rot |
Scytinostroma galactinum |
White mycelial wefts of S. galactinum on windthrown white ash. |
| 5297079 |
ash root rot |
Scytinostroma galactinum |
This root rot fungus produces wefts of white mycelium on the roots and soil of tipped-up trees. |
| 5297080 |
ash root rot |
Scytinostroma galactinum |
Root rot responsible for windthrow in white ash in northern lower Michigan. |
| 5042080 |
poor architecture |
|
Poor tree architecture caused by improper pruning and storm damage. |
| 5251050 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5251051 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5251052 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5251053 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5251054 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5251055 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups and female flowers of black spruce dwarf mistletoe. |
| 5251056 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups and male flowers of black spruce dwarf mistletoe. |
| 5251057 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups and new shoots of black spruce dwarf mistletoe. |
| 5251058 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Basal cups of black spruce dwarf mistletoe. |
| 5048059 |
poor architecture |
|
Basswood with poor tree architecture arising from lack of maintenance. |
| 5048060 |
poor architecture |
|
Poor architecture and decay arising from improper maintenance. |
| 5043010 |
rust |
Chrysomyxa ledi var. rhododendri |
Spruce needle rust, heavy infection. |
| 5042100 |
black knot |
Apiosporina morbosa |
Black knot of cherry. Multiple galls on small tree. Bob Heyd in image |
| 5048062 |
beech bark disease |
Nectria coccinea |
Cottony coverings of Cryptococcus fagisuga on American beech. |
| 5048071 |
beech bark disease |
Nectria coccinea |
Cottony soverings of Cryptococcus fagisuga and tarry spots, associated with beech bark disease. |
| 5049002 |
beech scale |
Cryptococcus fagisuga |
Cryptococcus fagisuga on American beech. |
| 5049003 |
beech scale |
Cryptococcus fagisuga |
Cryptococcus fagisuga on American beech. |
| 5049004 |
beech scale |
Cryptococcus fagisuga |
Cryptococcus fagisuga on American beech. |
| 5043054 |
cracks or splits |
|
Vertical seam closed with callus tissue. |
| 5298012 |
Compartmentalization Of Decay In Trees (CODIT) |
|
|
| 5050035 |
cracks or splits |
|
Sealed-over crack showing discoloration and decay in the center of the specimen. |
| 5032040 |
uncorrected lean |
|
A tree that has partially failed, resulting in a severe lean. |
| 5029084 |
Leptographium root disease |
Leptographium spp. |
Leptographium stain and weevil chip cocoon in red pine. |
| 5033062 |
cracks or splits |
|
A red maple with a crack resulting from a bad branch union. |
| 5370026 |
Caliciopsis canker |
Caliciopsis pinea |
Ascocarp and spermagonium at base |
| 5370027 |
Caliciopsis canker |
Caliciopsis pinea |
Caliciopsis pinea associated with Matsucoccus scale under the bark surface |
| 5251047 |
ash root rot |
Scytinostroma galactinum |
Root rot in white ash caused by Scytinostroma galactinum. Note the wefts of mycelial material on the surface of the tip-up mound. |
| 1473080 |
fir broom rust |
Melampsorella caryophyllacearum |
|
| 1263084 |
eastern pine gall rust |
Cronartium quercuum |
Uredinia on leaves |
| 1263085 |
eastern pine gall rust |
Cronartium quercuum |
Telia |
| 1263083 |
eastern pine gall rust |
Cronartium quercuum |
Aecia |
| 5033008 |
fir broom rust |
Melampsorella caryophyllacearum |
Aecia of M. caryophyllacearum |
| 5033009 |
fir broom rust |
Melampsorella caryophyllacearum |
Aecia of balsam fir broom rust |
| 5048034 |
included bark |
|
Bad branch angle with included bark |
| 5051052 |
dodder |
Cuscuta spp. |
Dodder on small oak tree in west-centeral Mexico |
| 5053033 |
included bark |
|
Crack starting at a codominant branch junction, with included bark. A very hazardous tree. |
| 5252002 |
included bark |
|
Poor branching angle with included bark, causing a crack all the way to the ground. |
| 1473134 |
balsam twig aphid |
Mindarus abietinus |
|
| 2143075 |
pinyon blister rust |
Cronartium occidentale |
cut end of branch showing canker cross-section; |
| 2143076 |
pinyon blister rust |
Cronartium occidentale |
sporulating canker erupting through bark; |
| 2143077 |
pinyon blister rust |
Cronartium occidentale |
sporulating canker erupting through bark; |
| 2143078 |
pinyon blister rust |
Cronartium occidentale |
sporulating canker erupting through bark; |
| 2143085 |
pinyon blister rust |
Cronartium occidentale |
bark removed to show sporulating canker |
| 2143087 |
pinyon blister rust |
Cronartium occidentale |
cut end of branch showing canker cross-section |
| 2143088 |
pinyon blister rust |
Cronartium occidentale |
cut end of branch showing canker cross-section |
| 2143089 |
pinyon blister rust |
Cronartium occidentale |
bark removed to show sporulating canker |
| 2143090 |
pinyon blister rust |
Cronartium occidentale |
sporulating canker |
| 2143091 |
pinyon blister rust |
Cronartium occidentale |
sporulating canker |
| 2145058 |
pinyon blister rust |
Cronartium occidentale |
Rough bark on tree with some removed to expose sporulating canker; |
| 2145061 |
pinyon blister rust |
Cronartium occidentale |
Discolored, rough bark with sporulating canker visible below pitch mass borer; |
| 2145062 |
pinyon blister rust |
Cronartium occidentale |
Discolored, rough bark with several sporulating cankers visible;. |
| 2145069 |
pinyon blister rust |
Cronartium occidentale |
Rough bark and pitching with sporulating canker exposed; |
| 2145070 |
pinyon blister rust |
Cronartium occidentale |
Rough bark and pitching with sporulating canker exposed; |
| 2145071 |
pinyon blister rust |
Cronartium occidentale |
Rough bark and pitching with sporulating canker exposed; |
| 2145079 |
pinyon blister rust |
Cronartium occidentale |
Sporulating canker exposed; |
| 5028007 |
risk tree |
|
Hazardous conditions caused by poor tree maintenance. |
| 5048017 |
weak branch union |
|
|
| 2141066 |
comandra blister rust |
Cronartium comandrae |
|
| 1473132 |
needle cast |
Bifusella saccata |
|
| 1473133 |
needle cast |
Bifusella linearis |
|
| 1473173 |
artist's conk |
Ganoderma applanatum |
sporophore; photo taken 8/1973 |
| 1473176 |
scaly pholiota |
Pholiota squarrosa |
sporophore and aspen wounds; photo taken 8/1973 |
| 1473185 |
Cytospora canker |
Valsa sordida |
spore horns; photo taken 10/1974 |
| 1473245 |
robustus conk |
Phellinus robustus |
|
| 1473131 |
Hypoderma fungus |
Hypoderma mexicanum |
photo taken in 1963 of asci and ascospores from needle tissue of type specimen |
| 1473129 |
needle cast |
Bifusella saccata |
1963 |
| 1473127 |
Pacific mistletoe |
Phoradendron villosum |
view of haustorium; 3/1/1964 |
| 1473244 |
robustus conk |
Phellinus robustus |
|
| 1473156 |
Hypoxylon cankers |
Hypoxylon spp. |
sporophores; October 1968 |
| 1473019 |
spruce broom rust |
Chrysomyxa arctostaphyli |
|
| 1473053 |
stalactiform blister rust |
Cronartium coleosporioides |
|
| 1473095 |
spruce broom rust |
Chrysomyxa arctostaphyli |
broom after infected needles produced in present year have shed |
| 1473102 |
Armillaria root rot |
Armillaria solidipes |
mycelial fans |
| 1473103 |
Armillaria root rot |
Armillaria mellea |
pathological specimens; the Armillaria is prominent in specimens on the left. Western gall rust and a conk also pictured. |
| 1473107 |
ponderosa pine dwarf mistletoe |
Arceuthobium vaginatum |
branch infections |
| 5044092 |
inrolled crack |
|
|
| 5048058 |
canker |
|
|
| 5050018 |
grade change |
|
|
| 5052066 |
Scleroderris canker of pine and spruce |
Gremmeniella abietina |
|
| 5050091 |
Diplodia blight |
Sphaeropsis sapinea |
|
| 5053026 |
tornado |
|
|
| 5034065 |
exposed roots |
|
|
| 5034066 |
exposed roots |
|
|
| 5052090 |
imbedded objects |
|
|
| 5052094 |
imbedded objects |
|
|
| 5048023 |
weak branch union |
|
|
| 5052076 |
undermined root system |
|
|
| 5050011 |
grade change |
|
|
| 5050012 |
grade change |
|
|
| 5050014 |
grade change |
|
|
| 5050016 |
grade change |
|
|
| 5053005 |
imbedded objects |
|
|
| 5053008 |
imbedded objects |
|
|
| 5053013 |
imbedded objects |
|
|
| 5053016 |
imbedded objects |
|
|
| 5050019 |
grade change |
|
|
| 5042081 |
poor architecture |
|
|
| 5040063 |
poor architecture |
|
|
| 5050015 |
grade change |
|
|
| 5052098 |
undermined root system |
|
|
| 5048030 |
weak branch union |
|
|
| 5049057 |
canker |
|
|
| 5033060 |
cracks or splits |
|
|
| 5033061 |
cracks or splits |
|
|
| 5053043 |
shear crack |
|
|
| 5048018 |
weak branch union |
|
|
| 5040064 |
poor architecture |
|
|
| 5040065 |
poor architecture |
|
|
| 5040062 |
poor architecture |
|
|
| 5053060 |
undermined root system |
|
|
| 5051001 |
Diplodia blight |
Sphaeropsis sapinea |
|
| 5051002 |
Diplodia blight |
Sphaeropsis sapinea |
|
| 5051004 |
Diplodia blight |
Sphaeropsis sapinea |
|
| 5050086 |
Diplodia blight |
Sphaeropsis sapinea |
|
| 5052095 |
imbedded objects |
|
|
| 5050083 |
imbedded objects |
|
Deck encroachment on tree bole |
| 5052096 |
topping |
|
|
| 5055091 |
imbedded objects |
|
|
| 5058035 |
inrolled crack |
|
|
| 5058036 |
inrolled crack |
|
|
| 5045054 |
imbedded objects |
|
|
| 5052046 |
stem girdling roots |
|
|
| 5052047 |
stem girdling roots |
|
|
| 5034016 |
stem girdling roots |
|
|
| 5034017 |
stem girdling roots |
|
|
| 5038073 |
stem girdling roots |
|
|
| 5202099 |
poplar rust |
Melampsora medusae |
The causal agent of poplar leaf rust (also called conifer-aspen rust) fruiting on tamarack. |
| 5032087 |
Armillaria root rots |
Armillaria spp. |
|
| 5032088 |
Armillaria root rots |
Armillaria spp. |
Mycelial mat remnants on declining white spruce in Wisconsin. |
| 5032090 |
Armillaria root rots |
Armillaria spp. |
Extensive development of mycelial mats on the root collar of recently dead white spruce in Wisconsin. |
| 5032091 |
Armillaria root rots |
Armillaria spp. |
Mycelial mats on large root of declining white spruce in Wisconsin. |
| 5032092 |
Armillaria root rots |
Armillaria spp. |
Heavy resin production at the root collar of a declining white spruce in Wisconsin. |
| 5032083 |
Armillaria root rots |
Armillaria spp. |
White mycelial mats of Armillaria sp. on declining spruce in Wisconsin. |
| 5032084 |
Armillaria root rots |
Armillaria spp. |
Mycelial mat on major root of a declining spruce tree in Wisconsin. |
| 5042082 |
stubs |
|
Badly pruned white pine |
| 5047084 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial wefts |
| 5047074 |
black knot |
Apiosporina morbosa |
Sporulating galls of the black knot fungus. |
| 5048020 |
included bark |
|
Codominant branches with a long crack |
| 5048052 |
weak branch union |
|
Poor branch attachment architecture in American elm |
| 5048038 |
inrolled crack |
|
Sugar maple with codominant stems and long crack. |
| 5048016 |
inrolled crack |
|
Codominant branches with crack |
| 5048032 |
shear crack |
|
Codominant stems coming apart at the point of attachment |
| 5048029 |
shear crack |
|
Codominant branches causing a shear crack. |
| 1397099 |
shear crack |
|
split at crotch |
| 5031058 |
Rhizosphaera needle cast |
Rhizosphaera kalkhoffii |
Sporocarps of Rhizosphaera emerge from the stomata. The sporocarps are black, and the stomata are often capped with a white waxy plug, which sometimes can be seen on the top of the sporocarps. |
| 1504046 |
violet-pored bracket fungus |
Trichaptum abietinum |
Hirschioporus abietinus; Four Notch Area |
| 1502031 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage - lob pine |
| 1501090 |
white pine blister rust |
Cronartium ribicola |
White pine blister rust |
| 1501093 |
white pine blister rust |
Cronartium ribicola |
White pine blister rust |
| 1501094 |
eastern pine gall rust |
Cronartium quercuum |
Eastern gall rust |
| 1501096 |
eastern pine gall rust |
Cronartium quercuum |
Eastern gall rust; Va. Pine |
| 1502013 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; branch gall |
| 1502014 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; aecial fruiting on stem gall |
| 1502020 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; stem gall causing "cabbage" |
| 1502027 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; stem gall |
| 1502028 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502029 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502030 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502032 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting branch canker (aecia) |
| 1502033 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502034 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502035 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1502036 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; fruiting aecial stage |
| 1503019 |
needle blight of cedar |
Didymascella thujina |
Needle blight; red cedar; pycnidia |
| 1503020 |
needle blight of cedar |
Didymascella thujina |
Needle blight; red cedar; pycnidia |
| 1503022 |
pine needle rusts |
Coleosporium spp. |
Needle rust; Coleosporium sp.; loblolly pine; aecia |
| 1503052 |
southern cone rust |
Cronartium strobilinum |
Cone rust; slash pine |
| 1503053 |
southern cone rust |
Cronartium strobilinum |
Cone rust; slash pine; North Lake City |
| 1501102 |
comandra blister rust |
Cronartium comandrae |
Comandra blister rust - fusiform rust comparison |
| 1501099 |
comandra blister rust |
Cronartium comandrae |
Comandra blister rust; loblolly pine |
| 1501101 |
comandra blister rust |
Cronartium comandrae |
Comandra blister rust; shortleaf pine; Buffalo Road |
| 1501039 |
oak wilt |
Ceratocystis fagacearum |
Oak wilt, old (6 mos +) pressure pad on live oak |
| 1501081 |
cedar-apple rust |
Gymnosporangium juniperi-virginianae |
Cedar apple rust gall; E. red cedar |
| 1501084 |
cedar-apple rust |
Gymnosporangium juniperi-virginianae |
Cedar apple rust |
| 1270008 |
root lifting, soil heaving, and windthrow |
|
|
| 1270006 |
shear crack |
|
codominant stems often reslut in a cracked trunk as the result of a weak branch union |
| 5030027 |
risk tree |
|
Hazard tree in a park near Tawas City, MI |
| 5029093 |
clinker polypore |
Inonotus obliquus |
|
| 5030002 |
western gall rust |
Endocronartium harknessii |
Single gall on jack pine |
| 5030003 |
western gall rust |
Endocronartium harknessii |
Sporulating gall |
| 5030004 |
western gall rust |
Endocronartium harknessii |
Sporulating gall |
| 5030006 |
western gall rust |
Endocronartium harknessii |
Sporulating gall, almost girdling a sapling |
| 5030007 |
western gall rust |
Endocronartium harknessii |
Multiple galls |
| 5030008 |
western gall rust |
Endocronartium harknessii |
Multiple galls |
| 5030010 |
western gall rust |
Endocronartium harknessii |
Sporulating gall |
| 5030011 |
western gall rust |
Endocronartium harknessii |
|
| 5030012 |
western gall rust |
Endocronartium harknessii |
Small gall |
| 5027085 |
American dwarf mistletoe |
Arceuthobium americanum |
|
| 5027086 |
American dwarf mistletoe |
Arceuthobium americanum |
|
| 5027087 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
male shoots; Arceuthobium pusillum male shoots |
| 5027079 |
annosum root disease |
Heterobasidion annosum |
|
| 5027095 |
Armillaria root rots |
Armillaria spp. |
Armillaria spp. often produce white pads of mycelium under the bark of infected trees. |
| 5027089 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
Arceuthobium pusillum witches brooms |
| 5027090 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
witch's brooms |
| 5027091 |
Armillaria root rots |
Armillaria spp. |
Armillaria on 40-year-old red pine |
| 5028090 |
Coprinellus fungi |
Coprinellus radians |
orange mycelial mat called the ozonium |
| 5027088 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
|
| 5027084 |
black knot |
Apiosporina morbosa |
Galls on small twigs usually kill the shoots distally from the gall. |
| 5029017 |
Diplodia blight |
Sphaeropsis sapinea |
pycnidia on a needle |
| 5028015 |
black knot |
Apiosporina morbosa |
Older sporocarp of Apiosporina morbosa on black cherry stem. |
| 5027092 |
Armillaria root rot |
Armillaria gallica |
Armillaria rhizomorphs are often found at or above the root collar under the bark of trees that have been killed by the fungus. |
| 5027093 |
Armillaria root rot |
Armillaria gallica |
A particularly heavy growth of rhizomorphs under the bark of a dead American elm. |
| 5037074 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat |
| 5047083 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat |
| 5037073 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat |
| 5032078 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat on white spruce |
| 5032079 |
Armillaria root rots |
Armillaria spp. |
|
| 1400020 |
risk tree |
|
White pine with defect over picnic area. |
| 1400044 |
stem girdling roots |
|
Girdling roots (excavated and painted white by Gary Johnson) on declining Linden tree in image 1400042. |
| 1407072 |
deadwood and snags |
|
eventual death will continue forever, or as long as trees survive. |
| 1408049 |
flush cut |
|
Fruit bodies of fungi often burst through wound dressings. This is a sure sign of decay, which can be stimulated by too much dressing. |
| 1408022 |
flush cut |
|
Cracks also start above flush-cut branches. One has started here at the pencil point on this maple which was flush-cut two years ago. |
| 1397078 |
shear crack |
|
Codominant stems with a major crack |
| 1408020 |
cracks or splits |
|
These large protruding splits are called frost cracks, a misnomer, since they begin with a wound, not frost. |
| 1397068 |
deadwood and snags |
|
hazard tree near swing; note the sloughing bark |
| 1397083 |
undermined root system |
|
Tree overhangs streambed. Campground tent site is just to the left of the stream in this image |
| 1397071 |
included bark |
|
Codominant stems in eastern white pine. These stems are very prone to failure from pressure exerted by included bark. |
| 1408015 |
inrolled crack |
|
Wounds sometimes start as vertical cracks. |
| 1408016 |
cracks or splits |
|
Cracks can also develop from branch stubs, |
| 1408017 |
cracks or splits |
|
splitting up from a branch stub |
| 1408018 |
cracks or splits |
|
crack forming down from stub |
| 1408019 |
cracks or splits |
|
Other causes of cracks, especially on young or thin-barked trees, include holes for injections and implants. |
| 1407061 |
wood decay |
|
Wood products are sometimes invaded by fungi, though these organisms are different from those that attack living trees. Keep wood products dry and protect them with preservatives to discourage fungi. |
| 1427066 |
Hypoxylon canker |
Annulohypoxylon thouarsianum var. thouarsianum |
Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black. |
| 1427067 |
sudden oak death |
Phytophthora ramorum |
bleeding canker |
| 3036077 |
wood rot fungi |
Trichoderma spp. |
Trichoderma sp. on stump |
| 3036074 |
Armillaria root rots |
Armillaria spp. |
Myceliall mat on wood- Armillaria |
| 3036002 |
comandra blister rust |
Cronartium comandrae |
Aecial pustules on commandra rust on pine branch |
| 3036003 |
pine needle rusts |
Coleosporium spp. |
Aecial pustules of a needle rust on pine needles, MN |
| 1502001 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; uredia on oak leaf; greenhouse |
| 1502004 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; pycnial ooze; greenhouse |
| 3035088 |
poplar rust |
Melampsora medusae |
Uredia of poplar rust on underside of cottonwood |
| 1501107 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; telia on oak leaf; Greenhouse |
| 1501109 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; telia on oak leaf; Greenhouse |
| 1501111 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Fusiform rust; uredia on oak leaf; greenhouse |
| 5032065 |
white pine blister rust |
Cronartium ribicola |
telia on Ribes sp. |
| 5061029 |
white pine blister rust |
Cronartium ribicola |
|
| 5061055 |
white pine blister rust |
Cronartium ribicola |
on alternate host |
| 5061056 |
white pine blister rust |
Cronartium ribicola |
on alternate host |
| 5061057 |
white pine blister rust |
Cronartium ribicola |
on alternate host |
| 5061058 |
white pine blister rust |
Cronartium ribicola |
on alternate host |
| 5061059 |
white pine blister rust |
Cronartium ribicola |
on alternate host |
| 5061083 |
white pine blister rust |
Cronartium ribicola |
|
| 5061084 |
white pine blister rust |
Cronartium ribicola |
|
| 5061086 |
white pine blister rust |
Cronartium ribicola |
and porcupine damage |
| 5058091 |
smooth patch of oak |
Aleurodiscus oakesii |
|
| 5040033 |
oak wilt |
Ceratocystis fagacearum |
|
| 5045060 |
Hawaii |
|
Missouri plaque commemorating Japan's surrender in WWII |
| 5045098 |
California |
|
Gifford Pinchot tree dedication plaque |
| 5035086 |
fire |
|
San Bernardino |
| 5058042 |
Rhabdocline needlecast |
Rhabdocline weirii |
|
| 5031076 |
wood decay |
Schizophyllum commune |
|
| 5031077 |
wood decay |
Schizophyllum commune |
|
| 5031078 |
wood decay |
Schizophyllum commune |
|
| 5031080 |
wood decay |
Schizophyllum commune |
|
| 5032018 |
oak leaf blister |
Taphrina caerulescens |
|
| 5032026 |
witch's butter |
Tremella mesenterica |
|
| 5032027 |
witch's butter |
Tremella mesenterica |
|
| 5032028 |
witch's butter |
Tremella mesenterica |
|
| 5032029 |
witch's butter |
Tremella mesenterica |
|
| 5046022 |
Rhabdocline needlecasts |
Rhabdocline spp. |
|
| 1427078 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 1427079 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 5058079 |
Sirococcus blight of conifers |
Sirococcus conigenus |
|
| 5032072 |
artist's conk |
Ganoderma applanatum |
|
| 5032074 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
|
| 5037094 |
white muscadine disease |
Beauveria bassiana |
Beauveria bassiana in Scolytus spp. galleries |
| 5037095 |
white muscadine disease |
Beauveria bassiana |
Beauveria bassiana on Scolytus multistriatus |
| 0364083 |
ectomycorrhizae |
|
conifer root tips with bifurcate branching habit |
| 0364079 |
ectomycorrhizae |
Pisolithus tinctorius |
ectomycorrhizal short roots |
| 2139061 |
Armillaria root rots |
Armillaria spp. |
rhizomorphs |
| 2139072 |
pinyon blister rust |
Cronartium occidentale |
|
| 1467026 |
Nectria canker |
Nectria spp. |
sporodochia |
| 1467129 |
dwarf mistletoes |
Arceuthobium spp. |
|
| 1467130 |
Douglas-fir dwarf mistletoe |
Arceuthobium douglasii |
basal cups |
| 1467144 |
Sydowia fungus |
Sydowia gregaria |
small black fruiting bodies between needle scars |
| 1467156 |
black stain root disease |
Ophiostoma wageneri |
|
| 1467157 |
black stain root disease |
Ophiostoma wageneri |
vascular discoloration |
| 1467159 |
black stain root disease |
Ophiostoma wageneri |
vascular discoloration |
| 1467160 |
black stain root disease |
Ophiostoma wageneri |
hyphae |
| 1467163 |
indian paint fungus |
Echinodontium tinctorium |
cross-section of sporophore; spore-bearing teeth |
| 1467173 |
sulfur shelf |
Laetiporus sulphureus |
|
| 1467252 |
white pine blister rust |
Cronartium ribicola |
aecia |
| 1467256 |
white pine blister rust |
Cronartium ribicola |
|
| 1467257 |
white pine blister rust |
Cronartium ribicola |
uredia on underside of leaves |
| 1467258 |
white pine blister rust |
Cronartium ribicola |
telia on underside of leaves |
| 1467259 |
white pine blister rust |
Cronartium ribicola |
telial columns |
| 1467263 |
needle rust |
Pucciniastrum goeppertianum |
aecia on white fir needles |
| 1467268 |
western gall rust |
Endocronartium harknessii |
aecia |
| 1467271 |
western gall rust |
Endocronartium harknessii |
germinating aeciospores |
| 1467274 |
limb rust |
Peridermium filamentosum |
aecial stage |
| 1467291 |
fir broom rust |
Melampsorella caryophyllacearum |
|
| 1467292 |
fir broom rust |
Melampsorella caryophyllacearum |
|
| 1467301 |
comandra blister rust |
Cronartium comandrae |
aecia formed on canker |
| 1467302 |
comandra blister rust |
Cronartium comandrae |
aecia on canker |
| 1467192 |
wood decay |
Schizophyllum commune |
cross-section; underside of sporophore on maple with 'V-shaped' discoloration of rot |
| 1467394 |
needle cast |
Virgella robusta |
long black hysterothecium along midrib |
| 1467399 |
common snow mold |
Phacidium infestans |
|
| 1467401 |
needlecast |
Davisomycella montana |
hysterothecia; note brown margiinal lines surrounding sordid areas |
| 1467310 |
pinyon blister rust |
Cronartium occidentale |
telia |
| 1467318 |
mistletoes |
Phoradendron spp. |
|
| 1467327 |
Douglas-fir dwarf mistletoe |
Arceuthobium douglasii |
|
| 1467339 |
pinyon dwarf mistletoe |
Arceuthobium divaricatum |
|
| 1467340 |
pinyon dwarf mistletoe |
Arceuthobium divaricatum |
|
| 1467371 |
Elytroderma needle cast of pine |
Elytroderma deformans |
long, narrow, black, hysterothecia |
| 1467304 |
comandra blister rust |
Cronartium comandrae |
|
| 1467307 |
comandra blister rust |
Cronartium comandrae |
telia |
| 1467308 |
comandra blister rust |
Cronartium comandrae |
germinating aeciospore |
| 1467416 |
white pine blister rust |
Cronartium ribicola |
telial horns |
| 1467419 |
white pine blister rust |
Cronartium ribicola |
basidiospore germinating in stomata; 40x with flourescence |
| 1467420 |
white pine blister rust |
Cronartium ribicola |
pseudosclerotium; 38um microtome section; red spot color bleached by water |
| 1467427 |
white pine blister rust |
Cronartium ribicola |
pycniospores produced 6 months to 3 years later |
| 1467407 |
needlecast |
Gloeocoryneum cinereum |
pycnidia |
| 1467413 |
white pine blister rust |
Cronartium ribicola |
aeciospores; usually produced on cankers at least 2 years old; May 1976 |
| 1467403 |
pine needle cast |
Lophodermium nitens |
black shiny hyserothecia |
| 1406193 |
Rhizosphaera needle cast |
Rhizosphaera kalkhoffii |
|
| 1468346 |
Armillaria root rots |
Armillaria spp. |
|
| 1468345 |
Armillaria root rots |
Armillaria spp. |
|
| 1468005 |
Armillaria root rot |
Armillaria mellea |
mycelial fans exposed after bark is removed |
| 1470129 |
sweet fern blister rust |
Cronartium comptoniae |
|
| 1457019 |
white pine blister rust |
Cronartium ribicola |
Aecial spore stage of white pine blister rust on main stem of a small tree. |
| 1377023 |
annosum root disease |
Heterobasidion annosum |
Sporocarps |
| 1399113 |
Melampsora leaf rust |
Melampsora laricis-populina |
uredospores on hybrid poplar |
| 1400031 |
milk-white toothed polypore |
Irpex lacteus |
|
| 1400123 |
black knot |
Apiosporina morbosa |
Ottawa National Forest |
| 1400111 |
chestnut blight or canker |
Cryphonectria parasitica |
orange colored stroma of cryphonectria on main stem around base of dead branch. |
| 2254001 |
fire |
|
fire hazard, bug killed timber sign |
| 1198040 |
Eutypella canker |
Eutypella parasitica |
Eutypella causes severe deformation in the stems of maples it infects. In advanced stages, the canker often has the general appearance of a cobra head. |
| 1198029 |
eastern pine gall rust |
Cronartium quercuum |
Indistinguishable from western gall rust (pine-pine rust, Endocronartium harknessii) without microscopic examination of spore germination. |
| 1427085 |
sudden oak death |
Phytophthora ramorum |
Bleeding on bark surface of coast live oak, caused by P. ramorum. |
| 1427089 |
Hypoxylon canker |
Annulohypoxylon thouarsianum var. thouarsianum |
Sporocarps on coast live oak. |
| 1427104 |
sudden oak death |
Phytophthora ramorum |
Zone lines of P. ramorum on coast live oak. |
| 1427106 |
sudden oak death |
Phytophthora ramorum |
Zone lines of P. ramorum on coast live oak. |
| 1427055 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 1427056 |
sudden oak death |
Phytophthora ramorum |
Zone lines of P. ramorum on coast live oak. |
| 1427057 |
sudden oak death |
Phytophthora ramorum |
Cankers and zone lines on coast live oak at China Camp State Park in California. |
| 1427058 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 1427059 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 1427060 |
sudden oak death |
Phytophthora ramorum |
P. ramorum zone lines on coast live oak. |
| 1427061 |
sudden oak death |
Phytophthora ramorum |
Bleeding from P. ramorum canker on coast live oak. |
| 1361159 |
bacterial leaf spot |
Pseudomonas syringae |
Oozing gum |
| 1210091 |
Armillaria root rots |
Armillaria spp. |
Characteristic white mycelial fan at root collar and on large root |
| 1301008 |
Armillaria root rots |
Armillaria spp. |
rhizomorphs |
| 1427012 |
sooty mold |
|
Cladosporium, Aureobasidium, Antennariella, Limacinula, Scorias, and Capnodium and other species of fungi cause sooty mold on a variety of hosts |
| 1427013 |
sooty mold |
|
Cladosporium, Aureobasidium, Antennariella, Limacinula, Scorias, and Capnodium and other species of fungi cause sooty molds on a variety of hosts. |
| 1427014 |
sooty mold |
|
Cladosporium, Aureobasidium, Antennariella, Limacinula, Scorias, and Capnodium and other species of fungi cause sooty molds on a variety of hosts. |
| 1427015 |
sooty mold |
|
Cladosporium, Aureobasidium, Antennariella, Limacinula, Scorias, and Capnodium and other species of fungi cause sooty molds on a variety of hosts. |
| 1301007 |
abortive Entoloma |
Entoloma abortivum |
|
| 1501098 |
comandra blister rust |
Cronartium comandrae |
|
| 1241715 |
white pine blister rust |
Cronartium ribicola |
Rust sporulating on the bole of an infected tree. |
| 1241580 |
fir needle rusts |
Pucciniastrum spp. |
Fir needle rusts fruit on 1-yr old needles. |
| 1241582 |
fir needle rusts |
Pucciniastrum spp. |
Yellow-white columns of aecial pustules are produced on the undersides of needles. |
| 1241585 |
brown felt blight |
Herpotrichia juniperi |
Brown felt blight produces a thick mat of gray to dark brown mycelium on foliage that was buried under snow. |
| 1241581 |
fir needle rusts |
Pucciniastrum spp. |
Yellow-white columns of aecial pustules are produced on the undersides of needles. |
| 1241676 |
annosum root disease |
Heterobasidion annosum |
Button conks; tiny, poorly formed conks of Heterobasidion annosum are sometimes found near the root collar of killed seedlings. They are also found on small roots of larger trees. |
| 1241611 |
Dothistroma needle blight |
Mycosphaerella pini |
Distinctive red transverse bands in which the fungus forms fruiting bodies. |
| 1241683 |
laminated root disease |
Phellinus weirii |
Cream or yellow to cinnamon colored mycelium is found on the outer bark of roots with laminated root rot. |
| 1241684 |
laminated root disease |
Phellinus weirii |
Cream or yellow to cinnamon colored mycelium is found on the outer bark of roots with laminated root rot. |
| 1241577 |
fir needle cast |
Isthmiella quadrispora |
Yellow discolored needles of subalpine fir with Isthmiella quadrispora (needle cast) infection and secondary infection by Lophomerum autumnale (Darker) magasi. |
| 1241578 |
common snow mold |
Phacidium infestans |
Snow blight kills needles under snow. Small black dots of fruiting bodies are in two lines on either side of the midrib on the underside of needles. |
| 1241507 |
Elytroderma needle cast of pine |
Elytroderma deformans |
Fruiting bodies are black lines near the base of needles. |
| 1241530 |
veiled polypore |
Cryptoporus volvatus |
Pouch fungus fruits through bark beetle emergence holes on boles. |
| 1210058 |
western gall rust |
Endocronartium harknessii |
|
| 0355056 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
branch gall |
| 1442263 |
artist's conk |
Ganoderma applanatum |
|
| 1442261 |
Armillaria root rot |
Armillaria mellea |
mycelial fan under bark of dying tree |
| 1442145 |
white heartwood rot |
Phellinus tremulae |
|
| 1442042 |
white pine blister rust |
Cronartium ribicola |
|
| 1442066 |
Armillaria root rots |
Armillaria spp. |
Mycelial fan; Rio Grande National Forest |
| 1427062 |
sudden oak death |
Phytophthora ramorum |
Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black. |
| 1427063 |
sudden oak death |
Phytophthora ramorum |
Showing Hypoxylon thouarsianum, a sapwood decay fungus that is also commonly isolated from Sudden Oak Death - affected oak trees, although it is also found on trees not affected by SOD. The presence of the half-dome-shaped fruiting bodies are indicative of advanced stages of SOD. Newly formed fruiting bodies are olive greenish or shiny black and release powdery green spores upon contact. Older fruiting bodies are dull black. |
| 1427031 |
sudden oak death |
Phytophthora ramorum |
zone lines |
| 1427032 |
sudden oak death |
Phytophthora ramorum |
zone lines |
| 0355057 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
closeup view of telia |
| 3036008 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
|
| 3036013 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
|
| 2733055 |
annosum root disease |
Heterobasidion annosum |
conks at base of tree |
| 3035087 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
uredial stage |
| 3035089 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
|
| 0976071 |
Armillaria root rots |
Armillaria spp. |
fan at the base of an infected tree |
| 0364052 |
Armillaria root rot |
Armillaria mellea |
rhizomorphs |
| 2252009 |
oak wilt |
Ceratocystis fagacearum |
fungal mat |
| 2250098 |
comandra blister rust |
Cronartium comandrae |
telia on comandra plant |
| 2250035 |
Armillaria root rot |
Armillaria solidipes |
mycelial fan under bark at base of tree |
| 2250091 |
white pine blister rust |
Cronartium ribicola |
aecia |
| 2250092 |
white pine blister rust |
Cronartium ribicola |
aecia |
| 2250093 |
white pine blister rust |
Cronartium ribicola |
aecia on white bark pine |
| 2250096 |
comandra blister rust |
Cronartium comandrae |
aecia |
| 2250097 |
pine needle rusts |
Coleosporium spp. |
mature aecia on needles |
| 0590006 |
Hypoxylon canker of aspen |
Entoleuca mammata |
pappery bark covering hyphal pegs |
| 0590005 |
Hypoxylon canker of oak |
Biscogniauxia atropunctata atropunctata |
ascostroma on oak |
| 0355063 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
pycnia |
| 0355065 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
close-up view of uredinia and telia |
| 0355066 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
Pycnia |
| 0355068 |
fusiform rust |
Cronartium quercuum f.sp. fusiforme |
pycnia |
| 0364048 |
Armillaria root rot |
Armillaria mellea |
rhizomorphs |
| 0364063 |
white pine blister rust |
Cronartium ribicola |
Pycnia |
| 0364064 |
white pine blister rust |
Cronartium ribicola |
Aecia |
| 0364061 |
Armillaria root rot |
Armillaria mellea |
mycelial fan under bark of black oak |
