USDA Forest Service
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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." |
| 37 Images of 15 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 0805012 | northern spruce engraver | Ips perturbatus | |
| 0805058 | spruce bud midge | Dasineura swainei | infested bud and larva |
| 0805059 | spruce zebra beetle | Xylotrechus undulatus | on white spruce |
| 0805060 | whitespotted sawyer | Monochamus scutellatus | on white spruce |
| 0805052 | spruce gall aphids | Adelges spp. | on spruce |
| 0805053 | giant conifer aphids | Cinara spp. | aphids on spruce |
| 0805056 | spruce seed moth | Cydia strobilella | spruce cone and larva |
| 0805057 | spruce bud midge | Dasineura swainei | killed spruce terminal |
| 0805017 | spruce budworm | Choristoneura orae | |
| 0805018 | spruce budworm | Choristoneura orae | |
| 0805020 | western blackheaded budworm | Acleris gloverana | |
| 0805009 | spruce beetle | Dendroctonus rufipennis | |
| 0805011 | northern spruce engraver | Ips perturbatus | white spruce mortality |
| 0805016 | spruce budworm | Choristoneura orae | |
| 0805006 | spruce beetle | Dendroctonus rufipennis | and eggs |
| 0805007 | spruce beetle | Dendroctonus rufipennis | |
| 0805004 | spruce beetle | Dendroctonus rufipennis | |
| 0805014 | northern spruce engraver | Ips perturbatus | |
| 0805001 | spruce beetle | Dendroctonus rufipennis | |
| 0805002 | spruce beetle | Dendroctonus rufipennis | infested white spruce attacked by beetles from infested log stack |
| 0805051 | spruce gall aphids | Adelges spp. | galls on white spruce |
| 0805022 | bud moths | Zeiraphera spp. | white spruce defoliation |
| 0805008 | spruce beetle | Dendroctonus rufipennis | third instars |
| 0805061 | yellow-horned horntail | Urocerus gigas flavicornis | on Sitka spruce |
| 0805015 | spruce budworm | Choristoneura orae | defoliation |
| 0805023 | bud moths | Zeiraphera spp. | |
| 0805055 | spruce bud scale | Physokermes piceae | scales on white spruce |
| 0805021 | western blackheaded budworm | Acleris gloverana | |
| 1241447 | spruce beetle | Dendroctonus rufipennis | Red-brown boring dust in lower bark crevices and around tree base is a sign of an attack. |
| 1241448 | spruce beetle | Dendroctonus rufipennis | Egg and larval galleries showing gregarious feeding habit of larvae. |
| 1241480 | horntails | Adult horntail wasp. | |
| 1241481 | horntails | ||
| 0805062 | yellow-horned horntail | Urocerus gigas flavicornis | on white spruce |
| 0805030 | hemlock sawfly | Neodiprion tsugae | female |
| 0805013 | northern spruce engraver | Ips perturbatus | frass on bark |
| 0805010 | spruce beetle | Dendroctonus rufipennis | woodpecker activity |
| 0805005 | spruce beetle | Dendroctonus rufipennis | frass |
