| 2250030 |
Armillaria root rots |
Armillaria spp. |
resinosus on buttress root of Douglas-fir |
| 1241668 |
Armillaria root rot |
Armillaria solidipes |
Fresh and older (bark) resinosus at the base of an infected Douglas-fir. |
| 1241653 |
root diseases and rots |
|
Root disease is often easily recognized from afar. Changes in tree density and clusters of young trees or brush assocaiated with tree mortality are good indicators of root disease. |
| 1241676 |
annosum root disease |
Heterobasidion annosum |
Button conks; tiny, poorly formed conks of Heterobasidion annosum are sometimes found near the root collar of killed seedlings. They are also found on small roots of larger trees. |
| 1241677 |
annosum root disease |
Heterobasidion annosum |
Annosus root disease often is diagnosed by looking in hollows of nearby stumps where the conks are found. The surface is gray or brown. |
| 1241680 |
annosum root disease |
Heterobasidion annosum |
One means of identifying annosus root disease is to incubate freshly cut sections of infected wood in a plastic bag to stimulate production of the asexual stage, Spiniger meineckellum (40x). |
| 1241681 |
laminated root disease |
Phellinus weirii |
Brown stain is sometimes seen in the sapwood or outer heartwood of trees with laminated root rot. |
| 2250050 |
laminated root disease |
Phellinus weirii |
decay and stain in Douglas fir |
| 2250053 |
annosum root disease |
Heterobasidion annosum |
fruiting body on ponderosa pine root |
| 2250031 |
laminated root disease |
Phellinus weirii |
mortality centers |
| 2250047 |
laminated root disease |
Phellinus weirii |
wind-thrown tree |
