Search results for: Torgersen, Torolf R.
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1
Douglas-fir tussock moth handbook : predation and parasitization of Douglas-fir tussock moth egg masses
Authors: Torgersen, Torolf R.
Published: Department of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1979Physical Description: 11 pages : illustrations ; 24 cm.Holdings: Loading…
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2
Identification of parasites of the Douglas-fir tussock moth, based on adults, cocoons, and puparia
Authors: Torgersen, Torolf R.
Published: Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1977Physical Description: 28 pages : illustrations ; 27 cm.Holdings: Loading…
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3
Save our birds, save our forests
Authors: Torgersen, Torolf R.
Published: U.S. Department of Agriculture, Forest Serivce, Pacific Northwest Region, 1995Physical Description: 1 folded sheet (8 pages) : color illustrations ; 23 x 11 cmHoldings: Loading…
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4
Parasite records for the Douglas-fir tussock moth
Authors: Torgersen, Torolf R.
Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1981Physical Description: 38 pages ; 28 cm.Holdings: Loading…
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5
How to predict population trends
Authors: Mason, Richard R.Other Authors: “…Torgersen, Torolf R.…”
Published: U.S. Department of Agriculture, Combined Forest Pest Research and Development Program, 1983
Physical Description: 7 pages : illustrations ; 24 cm.Holdings: Loading…
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6
Field and laboratory techniques for evaluating hemlock sawfly infestations
Authors: Hard, John S.Other Authors: “…Torgersen, Torolf R.…”
Published: U.S. Forest Service, 1975
Physical Description: 23 pages : illustrations ; 27 cm.Holdings: Loading…
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7
Hemlock sawfly
Authors: Hard, John S.Other Authors: “…Torgersen, Torolf R.…”
Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976
Physical Description: 7 pages : illustrations, map ; 23 cm.Holdings: Loading…
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8
Field guide for the identification of snags and logs in the interior Columbia river basin
Authors: Parks, Catherine G.Other Authors:
Published: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1997Physical Description: 1 online resource (40 pages) : illustrations (some color), map.Holdings: Loading…Connect to online resource - All users (Federal Depository Library Program Persistant URL)
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9
Trees and logs important to wildlife in the interior Columbia River basin
Authors: Bull, Evelyn L.Other Authors:
Published: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1997Physical Description: 1 online resource (55 pages) : illustrations (some color), maps.Holdings: Loading…Connect to online resource - All users (Federal Depository Library Program Persistant URL)
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10
Field guide for the identification of snags and logs in the interior Columbia river basin
Authors: Parks, Catherine G.Other Authors:
Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1997Physical Description: 40 pages : illustrations (some color), map ; 22 cm.Holdings: Loading…
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11
Trees and logs important to wildlife in the interior Columbia River Basin
Authors: Bull, Evelyn L.Other Authors:
Published: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1997Physical Description: 55 pages : illustrations (some color), maps ; 28 cm.Holdings: Loading…
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Related Subjects
Douglas fir tussock moth
Animals
Cavity-nesting birds
Control
Environmental aspects
Forest management
Habitat (Ecology)
Habitations
Tree cavities
Trees
Beneficial birds
Diseases and pests
Douglas fir
Douglas-fir tussock moth
Fir
Forest protection
Hemlock sawfly
Insect pests
Parasites
Parasitic insects