| 1408036 |
flush cut |
|
On the other side of the same sample, you can see where the dead branch was flushcut. The red arrow marks the limit of the cut, while the actual limit extended to the green arrow due to cambial dieback. Discolored sapwood spread to the purple arrows as a result of the cut. |
| 1408037 |
pruning (general) |
|
Cut dead brancheds as shown here. Do not injure or remove the callus ring... |
| 1408035 |
Compartmentalization Of Decay In Trees (CODIT) |
|
This section of a naturally shed cherry branch shows the perennial smal pocket of decay within the branch collar. The red arrows indicate a protective zone formed by the tree as the branch began to die 11 years ago when the tree had eight rings of sapwood. |
| 1398006 |
Lophodermium needle casts |
Lophodermium spp. |
|
| 1396134 |
Armillaria root rot |
Armillaria mellea |
|
| 1396141 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396150 |
Nectria canker |
Nectria spp. |
|
| 1396153 |
red heart of pine |
Phellinus pini |
|
| 1396143 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396144 |
Eutypella canker |
Eutypella parasitica |
Argonne Experimental Forest |
| 1396142 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1398052 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396140 |
Dutch elm disease |
Ophiostoma ulmi |
Wildcat Mountain Park |
| 1396148 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 1396139 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396136 |
Dutch elm disease |
Ophiostoma ulmi |
|
| 1396138 |
Dutch elm disease |
Ophiostoma ulmi |
Wildcat Mountain Park |
| 1396147 |
butternut canker |
Sirococcus clavigignenti-juglandacearum |
|
| 5050081 |
decay |
|
Decay column in red maple. |
| 5038075 |
Scleroderris canker of pine and spruce |
Gremmeniella abietina |
Green staining of G. abietina under the bark. |
| 5051092 |
Eutypella canker |
Eutypella parasitica |
Eutypella canker on small tree |
| 5037027 |
Verticillium wilts |
Verticillium spp. |
|
| 1407052 |
Dutch elm disease |
Ophiostoma ulmi |
Like all living things, trees eventually die and decay, victims of many living and manmade agents. The agent here is Dutch elm disease. To ward off this widespread infection, keep elm trees well pruned. If they do become infected, cut and destroy the diseased trees as soon as possible. |
| 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 |
| 1408004 |
tree pit |
|
pressure from concrete causes root deformation as tree grows to fill a tree pit at a street corner |
| 1396149 |
Nectria canker |
Nectria spp. |
|
| 1396132 |
sapstreak disease of sugar maple |
Ceratocystis coerulescens |
|
