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." |
| 10 Images of 8 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 2253010 | pine resin midges | Cecidomyia spp. | flagging terminals |
| 0805050 | pineapple gall midges | Rabdophaga spp. | gall on willow |
| 3057021 | poplar leafcurl midge | Prodiplosis morrisi | earlier damage & recovery |
| 1468129 | pinyon spindlegall midge | Pinyonia edulicola | |
| 2252060 | Douglas-fir needle midge | Contarinia pseudotsugae | |
| 1398193 | spruce gall midge | Mayetiola piceae | |
| 3067037 | leafcurl midges | Dasineura spp. | |
| 1587110 | Contarinia spp. | Contarinia spp. | |
| 1241572 | Douglas-fir needle midge | Contarinia pseudotsugae | Needles infested with Douglas-fir needle midge have swellings or galls which are discolored yellow or red. |
| 1241571 | Douglas-fir needle midge | Contarinia pseudotsugae | Needles infested with Douglas-fir needle midge have swellings or galls which are discolored yellow. |
