| 1409034 |
Compartmentalization Of Decay In Trees (CODIT) |
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In this oak, the red arrows show the limits of an old wound. An open crack formed where callus first closed the injury. The green arrows point to radial shakes that split outward, while the blue arrows show ring shakes associated with other wounds. The purple arrows point to internal radial shakes. |
| 1409035 |
Compartmentalization Of Decay In Trees (CODIT) |
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This black walnut was wounded at the green arrows when it was 1 inch in diameter. At the red arrows the calus infoll cut into the trunk and caused an internal crack. |
| 1409036 |
Compartmentalization Of Decay In Trees (CODIT) |
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Multiple cracks form when many radial shakes associated with old wound split outward, as in this post oak. The cracks start at the circular barrier zone. |
| 1409037 |
Compartmentalization Of Decay In Trees (CODIT) |
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When decay and cracks combine, as they did in this black locust, wall 2 is the tree's only defense against the spread of decay. |
| 1409038 |
Compartmentalization Of Decay In Trees (CODIT) |
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A decayed basal sprout on this oak was a weak spot from which a crack spread inward at the purple arrows and outward at the red arrows. "S" indicates sapwood, "H" is heartwood, and the dotted line shows the boundary between them. |
| 1409039 |
Compartmentalization Of Decay In Trees (CODIT) |
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This is a typical cracking pattern. The purple arrows point to where callus closed the wound. |
| 1409040 |
Compartmentalization Of Decay In Trees (CODIT) |
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In response to insect wounds, this maple formed wall 4. Radial cracks developed later at the blue arrows. |
| 1409041 |
Compartmentalization Of Decay In Trees (CODIT) |
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Wall 4 in this eucalypt separated to form a ring shake. Felling caused a radial crack at the 6 o'clock position. |
| 1408021 |
human caused injury |
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This oak was severely wounded when it was small. A crack later formed over the callus closure. Lawn mowers cause many injuries that later become cracks. Injured roots or roots killed during planting may also lead to cracks five or even 10 years later. |
| 1408022 |
flush cut |
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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. |
| 1407036 |
ribbed crack |
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Many problems can be traced to wounds. The split seam in this piece of oak is called a frost crack, but the trouble actually began with an injury that occurred when the tree was one inch in diameter. As callus formed around the wound, a seam developed and later split. The tree may have been injured by a lawnmower or some type of equipment. If people knew the consequences of their actions, |
