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Evaluating benthic macroinvertebrates as bio-indicators of freshwater habitat quality in an eastern Oregon agro-ecosystem

Creator:: Scherr, Melissa A.
Abstract:: The effect of anthropogenic disturbance on river systems is gaining attention, and concerns about the state of freshwater natural resources are increasing globally, as are efforts to restore habitat that has been degraded by disturbance. In rivers, non-point source pollution affects the physical characteristics of the habitat and the endemic...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Melissa A

Nitrogen fertilization of winter wheat grown in four rotations in western Oregon

Creator:: Sebastian, Kevin D.
Resource Type:: Masters Thesis
Full Text:: arrundinacea), maize (Zea mays), pea (Pisum sativum), and clover (Trifolium pratense). A different rotation

Applications of radiotelemetry to studies of California quail in western Oregon

Creator:: Kilbride, Kevin M.
Abstract:: A partially automated radio-tracking system with semi-continuous azimuth data collection and XYLOG5 and MAP computer programs for azimuth data analysis was used for studies of California quail (Callipepla californica) at the E.E. Wilson Wildlife Area, Oregon, in 1988 and 1989. Movements of 58 hens were monitored daily to determine nest...
Resource Type:: Masters Thesis
Full Text:: of California Quail in Western Oregon Abstract approved:_Redacted for Privacy \J John A. Craltrd

Assessment of black vine weevil larval damage to cranberries and development of alternative control strategies

Creator:: Miller, Elizabeth A. (Elizabeth Ann)
Abstract:: Black vine weevil (BVW), Otiorhynchus sulcatus Fabricius, is a serious pest in cranberry, Vaccinium macrocarpon. Larvae feeding below the soil surface cause damage to the roots and underground stems. Knowledge is sparse in regard to the damage potential of BVW in Pacific Northwest cranberry beds. Control with insecticides is limited...
Resource Type:: Masters Thesis
Full Text:: VINE WEEVIL IN CRANBERRIES AN ABSTRACT OF THE THESIS OF Elizabeth A. Miller for the

Description and analysis of dietary preference of lingcod in the nearshore zone, Oregon

Creator:: Tinus, Craig A.
Abstract:: The lingcod (Ophiodon elongatus) is an important groundfish species in both recreational and commercial fisheries of the Northeastern Pacific. It is a large, fast-growing, generalist predator of invertebrates and fishes. In response to concerns that lingcod may limit populations of rockfishes (Sebastes spp.), I compared the diets of 375 adult...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Craig A

Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Creator:: Eulensen, Gustav Egon
Abstract:: The transmission of strawberry mottle virus (SMV) to Fragaria vesca L. by Chaetosiphon thomasi and C. fragaefolii was studied to determine differences between the two species. Acquisition, inoculation, and retention phases of transmission were described. In all phases, C. fragaefolii was found to be the more efficient vector. Mean transmission...
Resource Type:: Masters Thesis
Full Text:: access period (AAP) reaching a plateau at 12 h. Maximum acquisition efficiency by C. thomasi was

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Creator:: Cacka, Joseph Francis
Resource Type:: Masters Thesis
Full Text:: information to assess economic importance and to develop a sequential sampling plan. Teneral adult weevils

Micropropagation and in vitro plant regeneration of rhododendrons

Creator:: Iapichino, Giovanni
Resource Type:: Masters Thesis
Full Text:: vitro propagation by adventitious shoot regeneration from somatic tissue offers a more efficient

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Creator:: Ambrosino, Mario D.
Abstract:: Four key aspects of the relationship between predatory hoverflies and the aphid pest Brevicoryne brassicae L. on broccoli were investigated in the Willamette Valley, Oregon USA: 1) the relationship between aphid density and hoverfly oviposition, 2) the larval voracity of key hoverfly species, 3) the preferences of hoverflies and broccoli...
Resource Type:: Dissertation
Full Text:: aphids per plant, but did not peak at the highest aphid densities. A logistic regression model, selected

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Creator:: Salisbury, Steven Earl
Abstract:: Winter wheat is commonly grown in rotation with leguminous and non-leguminous crops in the Willamette Valley. For agronomic, economic, and environmental reasons it is important to understand the influence of previous crops on availability of N and other nutrients. Objectives of this study were: (1) to evaluate the effects of...
Resource Type:: Masters Thesis
Full Text:: by Steven Earl Salisbury A THESIS submitted to Oregon State University in partial

ScholarsArchive@OSU

Evaluating benthic macroinvertebrates as bio-indicators of freshwater habitat quality in an eastern Oregon agro-ecosystem

Nitrogen fertilization of winter wheat grown in four rotations in western Oregon

Applications of radiotelemetry to studies of California quail in western Oregon

Assessment of black vine weevil larval damage to cranberries and development of alternative control strategies

Description and analysis of dietary preference of lingcod in the nearshore zone, Oregon

Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Micropropagation and in vitro plant regeneration of rhododendrons

Enhancing the predatory potential of hoverflies on aphids in Oregon broccoli fields with floral resources

Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

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