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Last edited by Open Library Bot
December 3, 2010 | History
An evaluation was made in 21 seed production areas and 1 seed orchard in Region 1 to identify the primary insect pests and to assess amount of injury caused. Cones from Douglas-fir, grand fir, western larch, lodgepole pine, ponderosa pine, and western white pine were collected periodically and examined. The primary insect species observed were western spruce budworm on Douglas-fir, grand fir, and western larch; midges on Douglas fir, grand fir, western larch, ponderosa pine, and lodgepole pine; coneworms on Douglas-fir, grand fir, western larch, and ponderosa pine; and the Douglas-fir cone moth on Douglas-fir.
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Subjects
Conifers, Diseases and pests, Forest insects, SeedsEdition | Availability |
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1
An evaluation of cone and seed insects in selected seed production areas in Region 1, progress report
1979, U.S. Forest Service, Region 1, State and Private Forestry
in English
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Book Details
Edition Notes
"June 1979."
Includes bibliographical references.
Also issued online.
The Physical Object
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Feedback?December 3, 2010 | Edited by Open Library Bot | Added subjects from MARC records. |
December 10, 2009 | Created by WorkBot | add works page |