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Evolutionary and ecological interactions affecting seaweeds

Creator:: Olson, Annette M.
Abstract:: The term "interaction" in evolutionary biology and ecology describes the relationships among variables in two classes of causal models. In the first, "interaction" refers to the influence of a single putatively causal variable on a variable of interest. In the second class of models, the term applies when a third...
Resource Type:: Dissertation
Full Text:: multicellular and sometimes physiologically independent (Bold et al. 1987). Because each stage is

Genetic studies with Russian wheat aphid (Diuraphis noxia Mordvilko) in PI 294994 bread wheat (Triticum aestivum L.)

Creator:: Elsiddig, Ahmed A.
Abstract:: Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), is a widely distributed species in western north America, and a major economic pest of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.). The objectives of this study were to : 1) determine the inheritance of seedling and adult plant resistances in...
Resource Type:: Masters Thesis
Full Text:: . Entomologia Experimentalis et Applicata. In press. Rybicki, E.P. and M.B. von Wechmar. 1984. Serological

Genetics and gene flow of organophosphate resistance in three predatory mites, Amblyseius andersoni Chant, Typhlodromus pyri Scheuten and Metaseiulus occidentalis Nesbitt (Acarina: Phytoseiidae), in Oregon

Creator:: Dunley, John E.
Abstract:: Genetics, gene flow, and distribution of pesticide resistance traits were examined for organophosphate (OP) resistance in three beneficial phytoseiid mites. Levels and genetics of OP resistance in Amblyseius andersoni were examined first. Laboratory strains from Italy and Oregon, USA, were compared in susceptibility to insecticides used in western Oregon fruit...
Resource Type:: Dissertation
Full Text:: biological control of spider mites (Croft et al. 1987; Dunley and Croft 1992). An important feature of

Control of mint root borer, Fumibotys fumalis, with the entomopathogenic nematode, Steinernema carpocapsae

Creator:: Takeyasu, Joyce
Resource Type:: Masters Thesis
Full Text:: (Pike et al., 1988). Crop damage is caused by the larval stage which feeds on the underground stems or

Responses of males to a pheromone blend of female Oriental fruit moth with and without E8, E10-dodecadien-1-ol, a pheromone component of codling moth (Lepidoptera: Tortricidae)

Creator:: Allred, Darin B.
Abstract:: E8,E10-dodecadien-1-ol, the primary component of the female sex pheromone of codling moth, Cydia pomonella L., has no attraction to male Oriental fruit moth (OFM), C. molesta (Busck). However, this compound when added to the OFM pheromone blend of Z8-dodecenyl acetate (85.5%), E8-dodecenyl acetate (5.5%), and Z8- dodecen -1 -ol (9.0%),...
Resource Type:: Dissertation
Full Text:: correlated directly to economic injury levels (Reidl et al. 1976, Welch et al. 1978). Pheromone traps also

A model of trophic evolutionary pathways

Creator:: Morris, A. Kimo
Abstract:: Calow (1983) realized that differences between parasites and their free-living relatives can be explained by the differences in nutrient richness. I propose a model that is based on Calow's idea which identifies the relative position of different trophic strategies (e.g. predation, grazing, parasitism and others) based on (1) the differences...
Resource Type:: Masters Thesis
Full Text:: parasitoids have (Berry et al., 1997). Justification for this iconoclastic classification will be given

Differential growth of roots and shoots of Douglas-fir (Pseudotsuga menziesii) seedlings infested with Cinara pseudotsugae, and population dynamics of a parasitoid wasp (Pauesia sp.) of C. pseudotsugae

Creator:: Smith, Julia P.
Abstract:: Aphids are a widespread family of plant pests, whose abilities to suppress shoot and root growth are well documented for many terrestrial plants. Only a few studies have been conducted on conifer aphids of the genus Cinara. Cinara pseudotsugae are known to attack Douglas-fir seedlings, an important crop in the...
Resource Type:: Masters Thesis
Full Text:: remove up to 400 times their body weight in sap per day (Van Hook et al., 1980). The willow aphid is

1996-98 Biennial report / Forest Research Laboratory

Creator:: Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report

Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam.

Creator:: Brodhagen, Marion L.
Abstract:: Spotted knapweed, Centaurea maculosa Lam. (Compositae) is an extremely successful introduced weed species in the northwestern United States. Multiple factors may be responsible for its success, including chemical defense. Two different types of putative chemical defense agents are the focus of this thesis. The first is a bitter-tasting sesquiterpene lactone,...
Resource Type:: Masters Thesis
Full Text:: minimal (Schroeder, 1985; Muller-Scharer and Schroeder, 1993; Landau et. al., 1994). Stems and branches

Research reports : 58th Annual Pacific Northwest Insect Management Conference

Creator:: Pacific Northwest Insect Management Conference
Abstract:: Proceedings of the 58th Annual Pacific Northwest Insect Management Conference, held January 4-5, 1999 at the Imperial Hotel in Portland, Oregon.
Resource Type:: Conference Proceeding

ScholarsArchive@OSU

Evolutionary and ecological interactions affecting seaweeds

Genetic studies with Russian wheat aphid (Diuraphis noxia Mordvilko) in PI 294994 bread wheat (Triticum aestivum L.)

Genetics and gene flow of organophosphate resistance in three predatory mites, Amblyseius andersoni Chant, Typhlodromus pyri Scheuten and Metaseiulus occidentalis Nesbitt (Acarina: Phytoseiidae), in Oregon

Control of mint root borer, Fumibotys fumalis, with the entomopathogenic nematode, Steinernema carpocapsae

Responses of males to a pheromone blend of female Oriental fruit moth with and without E8, E10-dodecadien-1-ol, a pheromone component of codling moth (Lepidoptera: Tortricidae)

A model of trophic evolutionary pathways

Differential growth of roots and shoots of Douglas-fir (Pseudotsuga menziesii) seedlings infested with Cinara pseudotsugae, and population dynamics of a parasitoid wasp (Pauesia sp.) of C. pseudotsugae

1996-98 Biennial report / Forest Research Laboratory

Expression of secondary metabolites following manipulations of the C:N ratio in spotted knapweed, Centaurea maculosa Lam.

Research reports : 58th Annual Pacific Northwest Insect Management Conference

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