| 1409070 |
Armillaria root rot |
Armillaria mellea |
The same patterns occur with Armillaria mellea. This aspen compartmentalized decay associated with Armillaria mellea after infection in the bark was stopped. |
| 1409072 |
Armillaria root rot |
Armillaria mellea |
Decay associated with Armillaria mellea in this red spruce did not spread to the center, because it was already altered. The pencil shows where wall 4 separated decayed wood from sound wood that formed after the dead area stopped developing. |
| 1409073 |
Armillaria root rot |
Armillaria mellea |
In this beech root, decay associated with Armillaria mellea was strongly restricted by wall 3 at the red arrows. Again, fungi do not grow at will in a tree. |
| 1409075 |
red heart of pine |
Phellinus pini |
Fomes pini associated with rot produced a wedge of tissue in the bark as indicated by the red arrows. It does not infect healthy sapwood or heartwood, but only wound-altered, resin-soaked, old sapwood and young heartwood, shown by the red dot and letter W, creating a ring pattern. |
| 1409076 |
red heart of pine |
Phellinus pini |
Sound heartwood separates many rings of decayed wood in this pine. The center was probably infected when it was still producing resin. Fomes pini does not grow at will in heartwood must be altered to accomodate the fungus before it can spread. |
| 1409077 |
red heart of pine |
Phellinus pini |
A varient of Fomes pini that occurs in fir on the west coast produced large wedges of infection in the bark. When these wedges coalesce, they will girdle the tree. |
| 1409078 |
clinker polypore |
Inonotus obliquus |
Many fungi produce wedges in bark. Trees usually respond by producing a blocking tissue in the bark. A wedge, like this formed by Poria obliquua in paper birch, allows the fungus to spread to the outer side of wall 4, thus enlarging the wound and starting seesaw action between tree and fungus. The result is a perennial canker. |
| 1409079 |
Strumella canker |
Strumella coryneoidea |
The seesaw action between this red oak and Strumella coryneoidea went on for many years. The green arrows show where the tree kept the fungus from spreading by producing a wood barrier. At the red arrows a new fungus wedge broke out and began to advance, thus enlarging the canker. |
| 1409068 |
annosum root disease |
Heterobasidion annosum |
CODIT is also applicable to root rots. A tree either rapidly stops the spread of infection, as shown in this pine infected by Fomes annosus, or it does not, letting the infection girdle and kill the root or butt. A cross-section was cut near the top of the dead area.... |
