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Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Creator:: Regan, Richard P. and Fisher, Glenn C.
Resource Type:: Conference Proceeding
Full Text:: OR 97331 COOLEY SPRUCE GALL ADELGID CONTROL IN DOUGLAS-FIR CHRISTMAS TREE PLANTATIONS, OREGON, 1986

Arthropod community structure in regenerating Douglas-fir and red alder forests : influences of geography, tree diversity and density

Creator:: Schaerer, Brett L.
Abstract:: The structuring of canopy arthropod communities was reviewed and investigated in relation to tree species diversity and its component factors, interspersion of different species and density of each tree species. Fifteen treatments of Douglas-fir (Pseudotsuga menziesii) and red alder (Alnus rubra) (various densities and proportions of each) were randomly assigned...
Resource Type:: Masters Thesis
Full Text:: Arthropod community structure in regenerating Douglas-fir and

The effects of mechanical damage on residual coastal Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) following commercial thinning

Creator:: Kiser, James D.
Abstract:: Commercial thinning operations can result in damage to residual stems. A literature review revealed that little was known about the effects of residual logging wounds with regard to rotation-age commercial conifers, particularly Douglas-fir. An experiment to examine fungal colonization of Douglas-fir following logging damage showed that while damage was significant...
Resource Type:: Dissertation
Full Text:: : Histochemical and geometric alterations of sapwood in coastal Douglas-fir (Pseudotsuga menziesii [Mirbel

Taper, crown, and volume responses of a coastal Oregon Douglas-fir stand to sulfur treatments for control of Swiss needle cast

Creator:: Younger, Nicole L.
Abstract:: For nearly two decades, foresters in the Oregon Coast Range have been witnessing a substantial decease in Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco.) vigor and growth, caused by Swiss needle cast (Phaeocryptopus gaeumannii). Currently, no solutions are in sight but aerially-applied sulfur may alleviate Swiss needle cast and its...
Resource Type:: Masters Thesis
Full Text:: 14, 2007. Title: Taper, Crown, and Volume Responses of a Coastal Oregon Douglas-fir Stand to

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

Creator:: Dodds, Kevin J.
Abstract:: Three studies on Douglas-fir beetle (DFB), Dendroctonuspseudotsuae, were conducted to investigate its basic and applied biology. Studies included investigations into the spatial relationship of DFB infestations over multiple years and multiple landscapes, relationships between DFB brood adult lipid levels and position of development along the length of tree boles, and...
Resource Type:: Dissertation

The Effects of Seed Source and Planting Environment on Douglas-fir (Pseudotsuga menziesii) Foliage Diseases

Creator:: Wilhelmi, Nicholas
Abstract:: Douglas-fir (Pseudotsuga menziesii) is a commercially and ecologically important tree species native to western North America. The foliar pathogens Phaeocryptopus gaeumannii, the causal agent of Swiss Needle Cast, and Rhabdocline species, the causal agents of Rhabdocline needle cast, are two important pathogens specific to Douglas-fir. These pathogens are highly influenced...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir has likely resulted in wide variation in the pathogens and disease pressure to which

Impacts of Swiss needle cast on Douglas-fir tree-ring stable isotopes and tree carbohydrate reserves

Creator:: Saffell, Brandy J.
Abstract:: Understanding the mechanisms of disease in forest pathology is a critical component to learning how to most efficiently manage tree diseases like Swiss needle cast (SNC). SNC is an economically important, fungal disease of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) that is prevalent in coastal areas of the Pacific Northwest. This...
Resource Type:: Masters Thesis
Full Text:: of Swiss Needle Cast on Douglas-fir Tree-ring Stable Isotopes and Tree Carbohydrate Reserves

Comparing structure and development of Douglas-fir old-growth, plantations, and young natural forests in western Oregon

Creator:: Dowling, Christopher D.
Abstract:: Ages, diameter growth, density, tree size, and species were studied in old-growth, plantation, and young natural Douglas-fir stands in three areas in western Oregon: the western and eastern Coast Range and the western Cascades. The purpose was to compare the development of these three stand types and to determine whether...
Resource Type:: Masters Thesis

Leaf-feeding sawflies in wheat

Creator:: Oregon State University. Extension Service, Corp, Mary K., and Fisher, Glenn C.
Abstract:: The larvae, or “worms,” of sawflies resemble small, green caterpillars that feed on the leaves of various plants. Although sawflies are rarely an economically important problem in Oregon cereal crops, unusually large populations (300 larvae/10 sweeps) of one species, probably Pachynematus sp., were found in Umatilla County in 2003. The...
Resource Type:: Technical Report
Full Text:: sweeps) was in fine fescue grown for seed in the Willam- ette Valley in 1971 and 1972. This pest was

A new pest attacking healthy ripening fruit in Oregon : spotted wing Drosophila : Drosophila suzukii (Matsumura)

Creator:: Dreves, Amy J., Walton, Vaughn M., Fisher, Glenn C., and Oregon State University. Extension Service
Abstract:: "Infestations of the spotted wing Drosophila fly (Diptera: Drosophilidae), an exotic pest, have been found in Oregon fruits in 13 counties. Of the 3,000 species of Drosophila, commonly known as vinegar flies, approximately 175 are known in North America. Two of these known species have been found to be harmful...
Resource Type:: Technical Report
Full Text:: Pest Attacking Healthy Ripening Fruit in Oregon 1 E M 8 9 9 1 • O c t o b e r 2 0 0 9

ScholarsArchive@OSU

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Arthropod community structure in regenerating Douglas-fir and red alder forests : influences of geography, tree diversity and density

The effects of mechanical damage on residual coastal Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) following commercial thinning

Taper, crown, and volume responses of a coastal Oregon Douglas-fir stand to sulfur treatments for control of Swiss needle cast

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

The Effects of Seed Source and Planting Environment on Douglas-fir (Pseudotsuga menziesii) Foliage Diseases

Impacts of Swiss needle cast on Douglas-fir tree-ring stable isotopes and tree carbohydrate reserves

Comparing structure and development of Douglas-fir old-growth, plantations, and young natural forests in western Oregon

Leaf-feeding sawflies in wheat

A new pest attacking healthy ripening fruit in Oregon : spotted wing Drosophila : Drosophila suzukii (Matsumura)

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