Narrow Results by:

Subject Specific Filters:

Type:

Diseases (6)
Other Damage Agents (1)
Plants (1)

  1. Category:             

    Root and Butt / Root and Stem Diseases (4)
    Stem Decays and Cankers (2)

  1. Order:                   (show all)

    Agaricales (1)
    Capnodiales (1)
    Helotiales (1)
    Hymenochaetales (1)
    Russulales (1)

Image Specific Filters:

  1. Descriptor:           

    Symptoms (6)
    Feature(s) (2)
    Fruiting Bodies (1)
    Sign (1)

Gender:

Female (1)

Image Setting:

Field (1)

USDA Forest Service

USDA Forest Service

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."
Remove Filters: Robert L. James(X) 4 Sizes Available(X) Landscape(X)
10 Images of 8 Subjects View Subject List View Image Details View Thumbnails

first prev Page: next last Display:

Image Subject Name Scientific Name Description
1241668 Armillaria root rot Armillaria solidipes Fresh and older (bark) resinosus at the base of an infected Douglas-fir.
1241741 fir and spruce canker Canker progressing from a branch into the stem.
1241742 fir and spruce canker Fir and spruce cankers are usually on branches, causing flagging.
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.
1241611 Dothistroma needle blight Mycosphaerella pini Distinctive red transverse bands in which the fungus forms fruiting bodies.
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.
1241710 Atropellis canker Atropellis piniphila Black staining of the sapwood beneath an Atropellis canker helps distinguish it from other stem cankers.
1241498 Douglas-fir dwarf mistletoe Arceuthobium douglasii Female

Page: