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  • Evaluation of grapevine red blotch virus epidemiology with reference to potential insect vectors

    Creator:
    Dalton, Daniel T.
    Abstract:
    Grapevine red blotch virus (GRBV), the causal agent of red blotch disease (RBD) in grapevine, Vitis vinifera L., is an emerging pathogen of significance to the wine grape industry of Oregon, USA. To address knowledge gaps of GRBV epidemiology, spread of GRBV was evaluated in Oregon vineyards over four years....
    Resource Type:
    Dissertation
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    production systems (Martin et al. 2005, Maree et al. 2013). Symptoms of infection include interveinal

  • Graphical models for multivariate spatial data

    Creator:
    Irvine, Kathryn M.
    Abstract:
    In this thesis we focus on a graphical model for multivariate spatially correlated data--isomorphic chain graphs (ICG; Gitelman and Herlihy, 2007). We feel ICG allow flexibility for modeling spatial correlation and are intuitively appealing because each model has an associated graph that visually represents a complex multivariate system. We examine...
    Resource Type:
    Dissertation
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    factorization for each model. We are able to rely on results provided in Andersson et al. (2001) and Gitelman

  • Marking, movement, and management of Drosophila suzukii in Oregon berry crops

    Creator:
    Klick, Jimmy
    Abstract:
    Drosophila suzukii Matsumura (Diptera: Drosophilidae) are small invasive flies that in the past five years (2009-2014) invaded berry and stone fruit production regions in Europe and the Americas. Evolutionary adaptations, biological traits, and anthropogenic factors have contributed to its current status as a global pest. Females oviposit eggs into ripe...
    Resource Type:
    Dissertation
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    .............................. 37 3.1 Monitoring traps for D. suzukii (Lee et al., 2012) made of a bottomless 946 ml clear

  • Biotic barriers to colonizing new hosts by the cinnabar moth Tyria jacobaeae (L.)(Lepidoptera: Arctiidae)

    Creator:
    Karacetin, Evrim
    Abstract:
    The cinnabar moth (Tyria jacobaeae (L.), Lepidoptera: Arctiidae) is an icon in population ecology and biological control that has recently lost its shine based on evidence that (1) it is less effective than alternatives (such as the ragwort flea beetle Longitarsus jacobaeae (Waterhouse) (Coleoptera: Chrysomelidae) for controlling ragwort Senecio jacobaea...
    Resource Type:
    Dissertation
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    to Idaho and Montana (Coombs et al. 2004). Although it is an icon in population ecology and

  • Entomopathogenic nematodes for biological control of the Colorado potato beetle, Leptinotarsa decemlineata (Say)

    Creator:
    Armer, Christine Andrea
    Abstract:
    The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is the most devastating foliage-feeding pest of potatoes in the United States. Potential biological control agents include the nematodes Heterorhabditis marelatus Liu & Berry and Steinernema riobrave Cabanillas, Poinar & Raulston, which provided nearly 100% CPB control in previous laboratory trials. In...
    Resource Type:
    Dissertation
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    decemlineata Say). Entomologia Experimenralis et Applicata 1: 209-224. Byers, J. A., and Poinar, G. 0., Jr

  • 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
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    . Ambrosino, P.C. Jepson, J.M. Luna JOURNAL: To be submitted to: Entomologia Experimentalis et Applicata

  • Habitat management for beneficial insects on Willamette Valley vegetable and berry farms

    Creator:
    Russell, Michael C.
    Abstract:
    Conservation biological control involves manipulating farm landscapes or management systems to enhance populations of beneficial predators of agricultural pests. Farmscaping is one aspect of conservation biological control where predators of important pests are identified, the availability on the farm landscape of resources and habitat components needed by the beneficials to...
    Resource Type:
    Dissertation
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    attempts to exploit this mechanism for practical pest management (Jonsson et al. 2008). A number of

  • Multi-Technique Characterizations of Natural and Biomimetic Adhesives

    Creator:
    Fowler, James E.
    Abstract:
    There have been many attempts to characterize and mimic natural fluid-based adhesive systems. However, very few of these studies have examined surface or interfacial interactions between adhesive and substrate. Furthermore, until now no study has used a combination of surface analytical and kinematic techniques to determine the precise chemical mechanisms...
    Resource Type:
    Dissertation
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    Experimentalis et Applicata 105, 13-28. [28] Gorb, E., Voigt, D., Eigenbrode, S.D. & Gorb, S. 2008 Attachment

  • Tree Physiological, Physical, and Chemical Characteristics Related to Spruce Beetle Colonization: Engelmann versus Blue Spruce

    Creator:
    Ott, Daniel S.
    Abstract:
    Blue spruce (Picea pungens) and Engelmann spruce (Picea engelmannii) experience varying levels of spruce beetle (Dendroctonus rufipennis (Kirby)) colonization, yet the underlying differences and mechanisms resulting in lower colonization for blue spruce are not known. Both spruce species have important roles in subalpine ecosystems where examining changes in mortality, distribution,...
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    Dissertation
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    angiosperm volatiles and verbenone. Entomologia Experimentalis et Applicata 91:131-141. Huber, D. P. W

  • Effects of esfenvalerate on native macroinvertebrates representative of Pacific Northwest streams

    Creator:
    Johnson, Katherine R.
    Abstract:
    Aquatic insects are essential components of healthy stream ecosystems, contributing to nutrient cycling, trophic dynamics and other ecological functions. Aquatic insect species, particularly those in the orders Ephemeroptera, Plecoptera and Trichoptera (EPT taxa) are however, extremely sensitive to insecticide contamination. Given that urban and agricultural use of synthetic pyrethroid insecticides...
    Resource Type:
    Dissertation
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    restoration exceeds $100 billion per year (Bonada et al. 2006). Since aquatic ecosystem restoration is a