Search Constraints

Start Over
Filtering by: Subject Douglas fir beetle -- Washington (State), Western Remove constraint Subject: Douglas fir beetle -- Washington (State), Western Academic Affiliation Forest Science Remove constraint Academic Affiliation: Forest Science

Search Results

  • Effect of plant date on subsequent seedling field performance

    Creator:
    Taylor, Michael Monroe
    Abstract:
    Douglas-fir (Psudotsuga menziesii (Mirb.) Franco) seedlings were outplanted on eight dates (every three weeks from mid-August 2005 through mid-January 2006). On each plant date, seedlings from a conventional dormancy (CONV) induction treatment, including moisture and nutrient stress, and a shortened daylength (SD) treatment were outplanted on three western Oregon sites...
    Resource Type:
    Masters Thesis
    Full Text:
    Douglas-fir and western larch seedlings in Eastern Washington. Of particular interest was the

  • The effects of stand density on the growth and microclimate of young Douglas-fir stands

    Creator:
    Woodruff, David R.
    Abstract:
    My objectives were to investigate the correlation of height and diameter growth in young Douglas-fir (Pseudotsuga menziesii) plantations with stand density, and to determine the effects of stand density on the canopy boundary layer conductance (g[subscript]ac) and microclimate characteristics of young Douglas-fir plantations. I measured annual height (h) and diameter...
    Resource Type:
    Masters Thesis
    Full Text:
    Washington. Each site consisted of test plantations of eight- and twelve-year-old Douglas-fir in initial

  • Height-related trends in structure and function of Douglas-fir foliage

    Creator:
    Woodruff, David R.
    Abstract:
    This dissertation investigated the impacts of tree height upon a range of physiological and structural characteristics of Douglas-fir foliage; relationships between structural and functional trends with height; and compensatory mechanisms that mitigate height-related growth constraints. Height-related trends in foliar physiological and anatomical characteristics were examined both within trees as well...
    Resource Type:
    Dissertation
    Full Text:
    trees was a 450-yr- old Douglas-fir /western hemlock (Pseudotsuga menziesii (Mirb.) Franco/Tsuga

  • Identifying candidate genes associated with cold adaptation in Douglas-fir using DNA microarrays

    Creator:
    Howe, Dana Kathryn
    Abstract:
    In forest trees from temperate and boreal regions, cold acclimation is an important adaptive trait that involves changes in gene expression and physiology. Genecological, quantitative genetic, and QTL studies have been used to study the genetics of cold acclimation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), but the genes responsible for...
    Resource Type:
    Masters Thesis
    Full Text:
    cold adaptation in populations of Douglas-fir from Oregon and Washington. I used two populations of

  • Evaluating the effectiveness of commonly used herbaceous weed control regimes in a Pacific Northwest conifer plantation

    Creator:
    Dinger, Eric
    Abstract:
    Early in the establishment of Pacific Northwest conifer plantations, herbaceous weeds often decrease seedling growth through competition for soil moisture during the dry summer months. Critical period studies have reported that reductions in competitive weed cover are necessary during the initial years of establishment to avoid reductions in seedling growth....
    Resource Type:
    Masters Thesis
    Full Text:
    ). 2007. Washington state climate data [accessed 30 January

  • Interference dynamics in mixed red alder/Douglas-fir forests

    Creator:
    D'Amato, Anthony W.
    Abstract:
    This study characterized the nature and dynamics of interference in mixed red alder (Alnus rubra Bong.)/Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) stands in the Pacific Northwest, USA. Long-term spatial and tree measurements from the Cascade Head (CH) and H.J. Andrews (HJA) Experimental Forests in western Oregon and Delezene Creek (DC), Washington...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Experimental Forests in western Oregon and Delezene Creek (DC), Washington were utilized to investigate

  • Western larch resistance to Douglas-fir beetle attack

    Creator:
    Neal, Tiffany A.
    Abstract:
    Live western larch, Larix occidentalis Nutt., a tree species resistant to the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, produces the monoterpene 3-carene in higher concentrations compared to Douglas-fir, the preferred host of D. pseudotsugae (Reed et al. 1986). The inhibitory effects on attraction to aggregation pheromones and toxicity of 3-carene to...
    Resource Type:
    Masters Thesis
    Full Text:
    relative resistance of live western larch to Douglas-fir beetle attack. lbe monoterpene 3-carene may