Dave Powell's Images
Title: SilviculturistOrganization: USDA Forest Service
Unit: Umatilla National Forest
Country: United States
| 9 Images of 3 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 0806072 | western spruce budworm | Choristoneura freemani | Group of three trees showing some budworm resistance; South Platte Ranger District, Pike National Forest, south-central Colorado |
| 1212015 | Douglas-fir tussock moth | Orgyia pseudotsugata | Indian Creek area, Heppner RD, Umatilla NF, 2001 |
| 0806073 | western spruce budworm | Choristoneura freemani | two trees side by side; one dead, one alive; Both trees were exposed to intense feeding by western spruce budworm; one was completely defoliated, whereas the other sustained relatively minor damage, suggesting by their proximity that some sort of genetic resistance may be involved. Starkey Experimental Forest, Wallowa-Whitman National Forest, northeastern Oregon |
| 0806070 | western spruce budworm | Choristoneura freemani | with 4-foot topkill from defoliation. Malheur National Forest, northeastern Oregon |
| 0806065 | western spruce budworm | Choristoneura freemani | Saplings & small poles with topkill from defolliation. Malheur National Forest, northeastern Oregon |
| 0806066 | western spruce budworm | Choristoneura freemani | Mortality. Aldrich Mountains, Bear Valley Ranger District, Malheur National Forest, northeastern Oregon |
| 0806064 | western spruce budworm | Choristoneura freemani | seedling missing about 50% of its foliage from defoliation. Malheur National Forest, northeastern Oregon |
| 1212097 | white satin moth | Leucoma salicis | Elk Flat, Walla Walla RD, Umatilla NF |
| 1212099 | white satin moth | Leucoma salicis | Close-up view of stand with defoliation; Elk Flat, Walla Walla RD, Umatilla NF |
