| 5454893 |
root problems |
|
Girdling root symptoms. |
| 5462124 |
decay |
|
|
| 5254093 |
canker |
|
Bleeding canker on landscape oak. Cause unknown. |
| 5061023 |
canker |
|
Unidentified canker on young walnut |
| 5047024 |
decay |
|
Severe decay in a willow. |
| 5047034 |
basal wound |
|
An ash with an open wound and decay at the ground line |
| 1400116 |
basal cankers |
|
Swollen butt and woodpecker damage. At the time this photo was taken, this tree had no signs of chestnut blight. The swollen butt and woodpecker damage seemed to be unrelated to chestnut blight. The tree has since succombed to the disease. |
| 5418685 |
stem girdling roots |
|
|
| 5418691 |
stem girdling roots |
|
|
| 5418686 |
stem girdling roots |
|
|
| 5418687 |
stem girdling roots |
|
|
| 5053049 |
decay |
|
Oak tree with decay resulting from death of codominant stem. |
| 5388187 |
root lifting, soil heaving, and windthrow |
|
When root growth is restricted by urban hardscapes, roots can cause damaging heaving of hardscapes. |
| 5375269 |
restricted root system |
|
Often, roots are restricted by roadways and sidewalks. |
| 5375240 |
decay |
|
Large cavity and decay at the base of a standing tree. |
| 5375261 |
restricted root system |
|
Restricted root systems shown signs of decline. |
| 5375265 |
decay |
|
Decay indications. |
| 5298092 |
decay |
|
|
| 5252011 |
decay |
|
Decay in a cottonwood that failed during a windstorm. |
| 5050081 |
decay |
|
Decay column in red maple. |
| 5052056 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5052057 |
decay |
|
Tree with a green crown, but extensive decay in the bole. |
| 5052058 |
decay |
|
Tree with a green crown, but extensive decay in the bole. |
| 5052059 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5052060 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5052061 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5052062 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5052063 |
decay |
|
Tree with green crown, but extensive decay in the bole. |
| 5044079 |
decay |
|
Tree with basal decay and hole, allowing water to enter. |
| 5394947 |
decay |
|
|
| 5394946 |
decay |
|
white mycellia in cavity of tree |
| 5298031 |
poor architecture |
|
"Ugly tree" syndrome from multiple defects and decay. |
| 5298040 |
poor architecture |
|
Poor tree architecture caused by accumulated defects, including decay and broken branches. |
| 5298016 |
decay |
|
Sawdust at base of tree, indicating internal decay. |
| 5298017 |
decay |
|
Decay at base of bole, in campground. |
| 5298018 |
decay |
|
Decay in stump from old codominant stem. |
| 5298019 |
decay |
|
Decay and piliated woodpecker injury. |
| 5298026 |
decay |
|
Hole in tree from decayed branch drop-out. |
| 5298027 |
decay |
|
Hole in tree from decayed branch drop-out. |
| 5298028 |
decay |
|
Hole in tree from decayed branch drop-out. |
| 5298029 |
decay |
|
Cavity and decay in bole, with abundant epicormic branching. |
| 5298030 |
decay |
|
Discoloration and decay in branch trace and stem, cross-section. |
| 5298032 |
decay |
|
Stump with extensive internal decay. |
| 5298041 |
decay |
|
Hole through tree caused by internal decay. Jana Albers is the person. |
| 5298042 |
decay |
|
Large open cavity and decay in bole of large tree. |
| 5298044 |
decay |
|
Extensive decay in bole. |
| 5298045 |
decay |
|
Extensive decay in bole (cross-section). |
| 5298046 |
decay |
|
Extensive decay and branch failure. |
| 5298047 |
decay |
|
Open cavity and decay at base of bole. Peter Bedker, Peggy Sand |
| 5298048 |
decay |
|
Tree with scar from large decayed branch failure. |
| 5298049 |
decay |
|
Sawdust and woodchips at base of decayed tree. |
| 5298050 |
decay |
|
Opening at base of tree signifying internal decay. |
| 5298058 |
decay |
|
Brown cubical rot at base of dead tree. |
| 5298059 |
decay |
|
Large cavity and decay at base of standing tree. |
| 5298060 |
deadwood and snags |
|
Snag with decay and large hole. |
| 5298064 |
decay |
|
Cross section showing extensive decay of heartwood, but showing good compartmentalization. |
| 5298065 |
decay |
|
Cross section with decay and carpenter ant tunnels. |
| 5298066 |
decay |
|
Cross section with extensive decay and carpenter ant tunnels. |
| 5298068 |
decay |
|
Hole in tree with extensive decay and cavity. |
| 5298069 |
decay |
|
Tree with wound caused by lightning, and associated woodpecker injury. |
| 5298070 |
decay |
|
Branch decay resulting from improper maintenance (topping) |
| 5298073 |
decay |
|
Discoloration and decay in wood pile after storm damage. |
| 5297082 |
canker |
|
Bleeding on surface of bark; cause unknown. |
| 5297083 |
canker |
|
Bleeding on bark surface; cause unknown. |
| 5251062 |
canker |
|
Bleeding on oak, unknown cause. |
| 5251059 |
decay |
|
Basal decay in oak; cause unknown. |
| 5048061 |
included bark |
|
Codominant branching and included bark. |
| 5049038 |
decay |
|
Brown cubical rot, unknown cause. |
| 5251099 |
canker |
|
Canker under tarry spot on oak. Cause unknown. |
| 5298011 |
decay |
|
|
| 5034049 |
deadwood and snags |
|
Dead aspen tree unknown cause, and living tree adjacent |
| 5034068 |
decay |
|
|
| 5034083 |
decay |
|
Large, dead, decayed white pine. Martin MacKenzie provides scale. |
| 5375229 |
decay |
|
Severely decayed stem |
| 5037075 |
decay |
|
Green ash with central stem decay. This open-grown green ash tree failed in a windstorm. |
| 5334073 |
stem girdling roots |
|
|
| 1473076 |
canker |
|
|
| 1473077 |
canker |
|
this has two cankers Cenaginium and Nectria |
| 5364499 |
root problems |
|
A chinese cabbage plant with abiotic root stress symptoms in the field. |
| 5364498 |
root problems |
|
A chinese cabbage plant with abiotic root stress symptoms in the field. |
| 5366449 |
root problems |
|
Pinyon pine showing severe symptoms of oxygen starvation of the roots, as well as root rot. |
| 1473003 |
canker |
|
|
| 1473004 |
decay |
|
|
| 1473005 |
canker |
|
|
| 1473027 |
canker |
|
|
| 1473028 |
canker |
|
A spruce with a broken top due to failure at a flat broad canker of unknown cause (Cytospora kunzi suspected).
|
| 5037091 |
decay |
|
This is a dead red pine, approximately 30' tall. The hazard is from potential kick-back when people dig at the lower part of the bole. |
| 5291098 |
decay |
|
heart wood decay evident |
| 5191062 |
decay |
|
decay in pine |
| 5191063 |
decay |
|
decay in pine |
| 5191066 |
decay |
|
decay in pine |
| 5033004 |
decay |
|
This tree has severe decay and extremely poor architecture, and is a very high hazard. |
| 5033005 |
decay |
|
A badly decayed and hazardous silver maple. |
| 3047015 |
decay |
|
cut logs showing hollowing; heartrot |
| 1503072 |
decay |
|
Heart rot; hardwoods; butt bulge shows the extent |
| 1503073 |
decay |
|
Stump rot |
| 1503094 |
decay |
|
Red heart; Four Notch area |
| 1238006 |
decay |
|
Heart rot cross-section showing inner branching |
| 1238007 |
decay |
|
Heartwood rot (Ram's horn) |
| 1468008 |
canker |
|
|
| 5191067 |
decay |
|
The base of the tree has had substantial decay and it is possible to see through the base |
| 3036037 |
restricted root system |
|
Parking lot caused dieback Columbia, SC |
| 5028069 |
restricted root system |
|
|
| 5029006 |
decay |
|
Severe decay in butt of red oak. Causal agent unknown. |
| 5177089 |
decay |
|
tree with a large hollow along a city street |
| 5177090 |
decay |
|
close-up of large hollow along a city street |
| 1361175 |
root problems |
|
Poor availability of air and water to root system |
| 1361182 |
root problems |
|
When transplanting balled trees, too often the ball is elvated several inches above original depth and 12" or greater of mulch is applied |
| 1400042 |
stem girdling roots |
|
Linden with girdling roots. |
| 1407074 |
decay |
|
brown cubical rot |
| 1408042 |
decay |
|
Fluids oozing from almost-closed wounds indicated internal problems. This English oak is 4 feet in diameter. The callus collar is very large, as is the internal column of decayed wood. |
| 1407034 |
decay |
|
Giant redwoods are no more immune to injury than the most auuaulted city tree; fruiting bodies on the exterior of the tree are cleas signs of internal decay |
| 1397069 |
root problems |
|
Root damage from erosion; Long-term erosion around tree in park. |
| 1397087 |
decay |
|
Bur oak with decay and large cavity. |
| 1397088 |
decay |
|
sawdust and chips at base of tree, indicating decay. |
| 1361196 |
root problems |
|
Seedlings planted with bent taproots tend to have greater levels of "sinuosity", an oscillating curvature of the stem |
| 0590038 |
basal cankers |
|
often initiated by fire injury |
