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  • Development of a posture prediction model

    Creator:
    Dendamrongvit, Thidarat
    Abstract:
    Biomechanical models have been used in designing human work environments to evaluate potential risks to workers before a work environment is constructed. In order for work environments to be modeled correctly, most biomechanical models require as input, an accurate body posture of the worker. This information can be obtained by,...
    Resource Type:
    Masters Thesis
    Full Text:
    Posture Prediction Model. Abstract approved: C. Woldstad Biomechanical models have been used in

  • Role of GacSA Two-component System and Bacterial Surface Attachment in Pseudomonas syringae Virulence

    Creator:
    O'Malley, Megan R.
    Abstract:
    Pseudomonas syringae are plant pathogenic bacteria that cause disease by rapidly multiplying within the aboveground tissues of host plants. Growth of P. syringae within plant host tissues requires the disarmament of host immune defenses that limit microbial growth. To combat host defenses, P. syringae deploys a type III secretion system...
    Resource Type:
    Dissertation
    Full Text:
    environment signals Megan R. O’Malley and Jeffrey C. Anderson

  • Aspects of the field and developmental biology of a Apanteles yakutatensis, a parasitoid of Autographa californica

    Creator:
    Madar, Robert John
    Abstract:
    Behavioral and ecological aspects of the field and developmental biology of Apanteles yakutatensis (Ashm.), a primary larval parasite of the alfalfa looper, Autographa californica (Speyer), were investigated in 1980 and 1981. Populations of A. yakutatensis were found in commercial peppermint, alfalfa and crimson clover fields involving two areas (Willamette Valley,...
    Resource Type:
    Masters Thesis
    Full Text:
    Cardiochiles nigriceps Viereck. Journal of Economic Entomology 10 Correspondence to: Jeffrey C. Miller

  • A three-trophic-level perspective on factors influencing herbivore abundance on collard

    Creator:
    McIver, James D.
    Abstract:
    The influence of natural enemies and plant apparency in determining the abundance of the cabbage aphid Brevicoryne brassicae L. and the imported cabbageworm Pieris rapae L. was examined on collards grown in a collard monoculture and in a collard-alfalfa biculture. This design was used to examine the factors affecting collardherbivore...
    Resource Type:
    Dissertation
    Full Text:
    Thanks to my advisor Dr. Jeffrey C. Miller for his help in all aspects of my work. I thank David

  • Distribution, phenology, and parasitism of the winter moth, (Operophtera brumata L.), in western Oregon

    Creator:
    Kimberling, Diana Nalani
    Abstract:
    An exotic pest of deciduous plants, Operophtera brumata (L.), was discovered in Portland, Oregon in 1978. O. brumata, the winter moth, is native to northern Africa and temperate Eurasia. Its range extends from Scandanavia, Britain, and France to Japan. It is also now well established on the North American continent...
    Resource Type:
    Masters Thesis
    Full Text:
    for Privacy f/ 10 / Jeffrey C. Miller An exotic pest of deciduous plants, Operophtera brumata (L

  • Biology of the yellowjacket parasitoid Bareogonalos canadensis (Harrington) (Hymenoptera: Trigonalyidae)

    Creator:
    Carmean, David
    Abstract:
    The known biology of Bareogonalos canadensis (Harrington) is based on literature records of six collections from three areas in the Pacific Northwest. The objective of this study was to obtain fundamental knowledge on the biology of B. canadensis, especially its distribution, abundance, and host species, as well as its potential...
    Resource Type:
    Masters Thesis
    Full Text:
    approved:__Redacted for Privacy JeffrAy C. Miller The known biology of Bareogonalos canadensis

  • Host exploitation by Dinocampus Coccinellae (Schrank) [Hymenoptera: Braconidae]

    Creator:
    Belnavis, Diane Lyn
    Abstract:
    Ecological relationships between D. coccinellae and its coccinellid hosts were examined in the Willamette Valley, Oregon, in 1982. The distribution and relative abundance of seven species of coccinellids from eight collecting sites were monitored to determine percent parasitism by D. coccinellae on a spatial and temporal basis. Host size and...
    Resource Type:
    Masters Thesis
    Full Text:
    largest species, C. californica, showed a low level of parasitism (4%). Within species, there appeared

  • Biology and host relations of Meteorus comunis (Cresson)

    Creator:
    West, Kenneth John
    Abstract:
    Fifteen species of Noctuidae (Lepidoptera) were collected in alfalfa and peppermint in western Oregon. Seven of these species were hosts for the braconid parasitoid Meteorus communis. The most frequently parasitized (percent) species were Agrotis ipsilon (35.3), Dargida procincta (15.0), and Peridroma saucia (6.9). Other species parasitized were Autographa californica (3.8)...
    Resource Type:
    Masters Thesis
    Full Text:
    Most of all, I wish to thank Dr. Jeffrey C. Miller for his interest, encouragement and support

  • Host suitability studies of Douglas-fir and white alder to the gypsy moth

    Creator:
    Joseph, Gladwin
    Abstract:
    Douglas-fir, Pseudotsuga menziesii and white alder, Alnus rhombifolia, species that are prevalent in the Pacific Northwest, were fed to larvae of the gypsy moth, Lymantria dispar L. Gypsy moth larvae from different familial lines (egg masses) from a single geographic population were evaluated on these hosts. The larvae were fed...
    Resource Type:
    Masters Thesis
    Full Text:
    White Alder to the Gypsy Moth Abstract Redacted for privacy approved: / f /Jeffrey C.Miller Douglas

  • Systematics and host associations of Ormyrus species (Hymenoptera: Chalcidoidea)

    Creator:
    Hanson, Paul E.
    Abstract:
    The genus Ormyrus has a worldwide distribution and comprises about sixty recognized species. The higher taxonomic relationships of the genus are uncertain, as evidenced by its placement in the families Ormyridae, Pteromalidae, or Torymidae. Here, the genus is described in detail and a preliminary catalog of the world species is...
    Resource Type:
    Dissertation
    Full Text:
    Species (Hymenoptera: Chalcidoidea) Redacted for privacy %7 J f1ey C. Miller Abstract approved: The