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Browsing by Subject "Conifers -- Diseases and pests -- Oregon"

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Browsing by Subject "Conifers -- Diseases and pests -- Oregon"

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  • Oregon State University. Extension Service; DeAngelis, Jack D. ([Corvallis, Or.] : Oregon State University, Extension Service, 1994-11)
    This publication covers the important aphid and adelgid pests of conifers in Oregon, excluding those that primarily feed on the roots of their host.
  • Hooven, Edward F. (Edward Frank); Oregon Forest Research Center (Corvallis, Or. : Oregon Forest Research Center, 1958-10)
  • Vandegrift, V. Eleanor (2002-05-01)
    Previous studies have indicated that roots from five tree species (Picea sitchensis, Tsuga heterophylla, Pseudotsuga menziesii, Pinus ponderosa, and Pinus contorta) decompose at different rates across an environmental gr ...
  • Oregon State University. Extension Service; Shaw, David Carl, 1955-; Oester, Paul T.; Filip, Gregory M. (Corvallis, Or. : Extension Service, Oregon State University, 2009-06)
    Discusses options for managing major insect pests and diseases of conifers in Oregon forests: bark beetles, wood borers, and ambrosia beetles; defoliators; aphids, adelgids, and scale insects; terminal and branch insects ...
  • Oregon State University. Extension Service; Kavanagh, Kathleen L., 1955-; Filip, Gregory M.; Rogers, William Reinhold ([Corvallis, Or.] : Oregon State University, Extension Service, 2000)
    This publication discusses the environmental requirements of needle diseases, their potential impact on tree vigor, when disease levels signal a problem, and what you can do to minimize damage.
  • Lattin, Peter D. (1997-06-03)
    This study was conducted to investigate why root disease centers east of the Cascade crest tend to be larger in diameter and more abundant than their counterparts to the west, within subalpine forest stands of central ...

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