Some Typical Patterns of Discolored and Decayed Wood Associated with Wounds

Near the wound, the individual columns within each growth ring will be clustered. Some of the various shapes of discolored and decayed wood will be seen as on transverse wedge-shaped sections in the next series of diagrams. (fig. 56)

The eye sees a macroscopic view like this. (fig. 57)

But the mind's eye SHOULD see a diagrammatic view like this. Keep this in mind while viewing the following diagrams. (fig. 58)

Walls 2, 3, and 4 are pointed out by arrows in this drawing. These walls will be present in other diagrams, but no arrows will be shown. (fig. 59)

CODES FOR ALL DIAGRAMS

Green-Discolored wood

Brown-Decayed wood

Orange-Wall 4

Figure 56
Figure 56		 Figure 57,58,59
Figure 57
Figure 58
Figure 59

Six-Year-Old Severe Type Wound
The discolored wood forms the typical triangular pattern into the pith. (fig. 60)

Four-Year-Old Moderate Type Wound
The compartments directly beneath the wound were the only ones affected (fig. 61)

Multiple Wounds: A central 10-year-old wound associated with a central column of discolored wood. A later 4-year-old wound with a triangular column of discolored wood that developed to the boundary of the inner barrier zone surrounding the 10-year-old wound. (fig. 62)

Multiple Wounds: A central 10-year-old wound with a central column of discolored wood. A 2-year-old wound with a small column of discolored wood did not spread into the older, more central column. (fig. 63)

Figure 60 Figure 61
Figure 60 Figure 61
Figure 62 Figure 63
Figure 62 Figure 63
Figure 64
Figure 64
A Deep Drill Wound: The tissues between the end of the drill wound and the inner column of discolored wood will discolor slightly. The radial walls (Walls 3) limit the lateral spread of the discolored wood. (fig. 64)

When the drill hole is shallow, the compartments between the inner column and the tip of the drill hole may remain healthy or nondiscolored. This is the case when shallow injection wounds are inflicted. (fig. 65)

A slanted drill hole usually gives this type of pattern. Note that the discolored compartment between the central column of discolored wood and the tip of the drill hole follow the ray pattern inward (Wall 3). The column beyond the end of the drill hole does not continue in the same direction as the hole. Often the side of the hole closest to the cambium will be darker from an accumulation of phenols. (fig. 66)
Figure 65 Figure 66
Figure 65 Figure 66

figure 67 A series of seven sections from above a wound similar to that shown on page 39 figure 56. Each section is approximately 20 centimeters above the other. Note the pattern of discolored and decayed wood and the position of the barrier zone. (figs. 67-73)

Figure 67


Figure 68 Figure 69 Figure 70
Figure 68 Figure 69 Figure 70
Figure 71 Figure 72 Figure 73
Figure 71 Figure 72 Figure 73
Four sections showing the pattern of discolored and decayed wood associated with multiple wounds on four trees. A multitude of specific multiple patterns is possible depending on the wounds inflicted, their severity, position, and time between woundings. (figs. 74-77)
Figure 74 Figure 75
Figure 74 Figure 75
Figure 76 Figure 77
Figure 76 Figure 77

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