| 0355053 |
eastern pine gall rust |
Cronartium quercuum |
aecia |
| 1241567 |
Rhabdocline needlecasts |
Rhabdocline spp. |
Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 1241566 |
Rhabdocline needlecasts |
Rhabdocline spp. |
Rhabdocline apothecia are released when flaps of leaf epidermis fold back on either side of the midrib. |
| 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. |
| 1241587 |
larch needle cast |
Hypodermella laricis |
Black dots of fruiting bodies form in midsummer on needles. |
| 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. |
| 1241673 |
Armillaria root rot |
Armillaria solidipes |
Even seedlings have mycellium fans in the root or root collar cambium. |
| 1241727 |
comandra blister rust |
Cronartium comandrae |
Comandra blister rust sporulating on a young lodgepole stem. |
| 5300087 |
eastern tent caterpillar |
Malacosoma americanum |
Tent of eastern tent caterpillar |
| 2141067 |
comandra blister rust |
Cronartium comandrae |
on a seedling |
| 5252022 |
white muscadine disease |
Beauveria bassiana |
Larvae of Scolytus multistriatus killed by the insect pathogen Beauveria bassiana. |
| 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. |
| 5038076 |
Scleroderris canker of pine and spruce |
Gremmeniella abietina |
Green stain of wood caused by G. abietina |
| 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 |
| 5044003 |
cracks or splits |
|
Long spiral frost crack. |
| 5044018 |
deadwood and snags |
|
Dead oak top (tree hazard) |
| 5038036 |
cracks or splits |
|
Dead top with major split. |
| 5044019 |
deadwood and snags |
|
Large dead branches |
| 5042080 |
poor architecture |
|
Poor tree architecture caused by improper pruning and storm damage. |
| 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 |
| 5043054 |
cracks or splits |
|
Vertical seam closed with callus tissue. |
| 5050035 |
cracks or splits |
|
Sealed-over crack showing discoloration and decay in the center of the specimen. |
| 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 |
| 5252002 |
included bark |
|
Poor branching angle with included bark, causing a crack all the way to the ground. |
| 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; |
| 5044092 |
inrolled crack |
|
|
| 5045054 |
imbedded objects |
|
|
| 5033060 |
cracks or splits |
|
|
| 5033061 |
cracks or splits |
|
|
| 5042081 |
poor architecture |
|
|
| 5058036 |
inrolled crack |
|
|
| 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. |
| 5029093 |
clinker polypore |
Inonotus obliquus |
|
| 5030002 |
western gall rust |
Endocronartium harknessii |
Single gall on jack pine |
| 5030003 |
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 |
| 5030010 |
western gall rust |
Endocronartium harknessii |
Sporulating gall |
| 5027084 |
black knot |
Apiosporina morbosa |
Galls on small twigs usually kill the shoots distally from the gall. |
| 5027087 |
eastern dwarf mistletoe |
Arceuthobium pusillum |
male shoots; Arceuthobium pusillum male shoots |
| 5028015 |
black knot |
Apiosporina morbosa |
Older sporocarp of Apiosporina morbosa on black cherry stem. |
| 5028090 |
Coprinellus fungi |
Coprinellus radians |
orange mycelial mat called the ozonium |
| 5037073 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat |
| 5037074 |
Armillaria root rots |
Armillaria spp. |
Armillaria mycelial mat |
| 5032079 |
Armillaria root rots |
Armillaria spp. |
|
| 5045060 |
Hawaii |
|
Missouri plaque commemorating Japan's surrender in WWII |
| 5045098 |
California |
|
Gifford Pinchot tree dedication plaque |
| 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 |
|
| 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 |
| 2139072 |
pinyon blister rust |
Cronartium occidentale |
|
| 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. |
| 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. |
| 1241715 |
white pine blister rust |
Cronartium ribicola |
Rust sporulating on the bole of an infected tree. |
| 1241611 |
Dothistroma needle blight |
Mycosphaerella pini |
Distinctive red transverse bands in which the fungus forms fruiting bodies. |
| 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. |
| 1241580 |
fir needle rusts |
Pucciniastrum spp. |
Fir needle rusts fruit on 1-yr old needles. |
| 1241581 |
fir needle rusts |
Pucciniastrum spp. |
Yellow-white columns of aecial pustules are produced on the undersides of 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. |
| 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. |
