Index Catalog // ScholarsArchive@OSU

Biology, ecology and management of Scaptomyza apicalis Hardy (Diptera : Drosophilidae) on meadowfoam, Limnanthes alba benth in western Oregon

Creator:: Panasahatham, Sarote
Abstract:: Biology of Scaptomyza apicalis Hardy (Diptera: Drosophilidae) was studied in relation to its host, meadowfoam, Limnanthes alba, a recent oil seed crop grown in the Willamette Valley, Oregon. Populations of flies and larvae were monitored weekly over three consecutive crop-years beginning in 1996. Yellow sticky traps gave relative population estimates...
Resource Type:: Dissertation
Full Text:: variety was developed in 1970 from a single plant, the accession P1238-704 by the Oregon Agricultural

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Creator:: York, Melissa M.
Abstract:: Small remnants of 'natural' habitats exist today throughout much of the world. Upland prairies in the Willamette Valley, Oregon have been nearly eliminated by conversion to agriculture and other uses. As a result, very few prairies remain and at least four butterfly species that require this habitat appear to be...
Resource Type:: Masters Thesis
Full Text:: collected at 17 sites in the Willamette Valley, Oregon, 2000 107 Relationship Between Plant and Butterfly

Spatial and temporal dynamics of the Douglas-fir bark beetle (Dendroctonus pseudotsugae, Hopk.) in the Detroit Ranger District, Oregon : a landscape ecology perspective

Creator:: Powers, Jennifer Sarah
Abstract:: I developed a conceptual model of Douglas-fir bark beetle dynamics and associated host mortality across spatial and temporal scales. I proposed that a hierarchy of factors influence host resistance to attack at different spatial scales. I then tested this model by measuring the association between the occurrence of beetle-kill and...
Resource Type:: Masters Thesis
Full Text:: , Oregon: a Landscape Ecology Perspective. Abstract approved: Phillip Sollins I developed a

Plant architectural barriers to feeding site selection by the meadow spittlebug, Philaenus spumarius (L.)

Creator:: Hoffman, George D.
Abstract:: While current theories describing the insect-plant interaction have emphasized the biochemical aspects of the relationship, morphological components can also play a significant role in determining which plants or tissues are susceptible to insect attack. Xylem sap on which spittlebugs feed may lack many of the plant compounds responsible for host...
Resource Type:: Masters Thesis
Full Text:: ). For xylem feeders the anatomical component of the insect-plant relationship may be a critical factor

Comparison of soil and vegetation map delineation shapes and areal correspondence

Creator:: Bilton, Janet
Abstract:: Map delineations of soil and vegetation for a 14,000 acre (5,800 hectare) site in the Oregon Coast Range were compared. Research objectives were to ascertain the types of information that could be extracted from delineation comparisons and to develop a methodology suited to this purpose. The latter objective was achieved...
Resource Type:: Masters Thesis

Soil and understory vegetation characteristics of a tractor-logged forest in eastern Oregon

Creator:: Snider, Michael Duane
Abstract:: A 1.5 ha mixed conifer stand in the Blue Mountains of Oregon was intensively examined to assess the impact of logging disturbance on soils and herbaceous vegetation. Sampling was conducted six years after much of the timber overstory was removed in a shelterwood cut and yarded by crawler tractor. A...
Resource Type:: Masters Thesis
Full Text:: northeastern Oregon, Edgerton (1973) found total plant cover on two partially cut mixed conifer sites was

Ecology of Craterellus tubaeformis in western Oregon

Creator:: Trappe, Matthew James
Abstract:: Craterellus tubaeformis is a small to medium-sized forest mushroom that is fairly common in the Douglas-fir/western hemlock forests of the Pacific Northwestern United States and is most often associated with decayed coarse woody debris. In this study, the mycorrhizae of Craterellus tubaeformis in western Oregon is identified by DNA analysis...
Resource Type:: Masters Thesis
Full Text:: this study, the mycorrhizae of Craterellus tubaeformis in western Oregon is identified by DNA

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

Creator:: Swanson, Sherman R.
Abstract:: Infiltration, soil erosion, nitrogen loss and soil profile characteristics were measured on 36 sites representing land occupied by Artemisia tridentata ssp. tridentate, wyomingensis, and vaseyana. Infiltration, soil erosion, and nitrogen loss were strongly correlated but highly variable. Soil loss, but not infiltration or nitrogen loss was significantly different between subspecies....
Resource Type:: Dissertation
Full Text:: Profile Characteristics of Oregon Lands Occupied by Three Subspecies of Artemisia tridentata Sherman R

Salivation and engorgement parameters of sucking insect vectors : implications in pathogen transmission

Creator:: Shieh, Jong-neng
Abstract:: The probing behavior and feeding activity of green peach aphid, Myzus persicae Sulzer, on Bacillus thuringiensis ssp. tenebrionis- transgenic potatoes, insecticide treated potatoes, and host plants with different preference were electronically monitored. I found that first, transgenic potatoes had no effect on green peach aphid probing suggesting that transmission of...
Resource Type:: Dissertation
Full Text:: substrates, for example a plant leaf. An aphid (or sucking-insect) is connected to an amplifier in the

Analysis of a hydrologic balance model and Penman-Monteith evapotranspiration estimating methods

Creator:: Carrijo, Osmar Alves
Abstract:: The major objectives of this study were an evaluation of the Meteorological Office Rainfall and Evaporation Calculation System (MORECS) evapotranspiration (ET) model using the Penman-Monteith equation and comparison of the MORECS and measured surface resistance. Meteorological, soil and plant parameters were measured in an alfalfa field over two growing seasons....
Resource Type:: Dissertation
Full Text:: comparison of the MORECS and measured surface resistance. Meteorological, soil and plant parameters were

ScholarsArchive@OSU

Biology, ecology and management of Scaptomyza apicalis Hardy (Diptera : Drosophilidae) on meadowfoam, Limnanthes alba benth in western Oregon

Relationship between plant and butterfly community composition on upland prairies of the Willamette Valley, Oregon

Spatial and temporal dynamics of the Douglas-fir bark beetle (Dendroctonus pseudotsugae, Hopk.) in the Detroit Ranger District, Oregon : a landscape ecology perspective

Plant architectural barriers to feeding site selection by the meadow spittlebug, Philaenus spumarius (L.)

Comparison of soil and vegetation map delineation shapes and areal correspondence

Soil and understory vegetation characteristics of a tractor-logged forest in eastern Oregon

Ecology of Craterellus tubaeformis in western Oregon

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

Salivation and engorgement parameters of sucking insect vectors : implications in pathogen transmission

Analysis of a hydrologic balance model and Penman-Monteith evapotranspiration estimating methods

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