Index Catalog // ScholarsArchive@OSU

Creator:: Mitchell, Russel Gene
Resource Type:: Dissertation
Full Text:: thesis~ To Dr. Julius A. Rudinsky, Associate Professor of Entomology, who helped outline the project

Creator:: Gara, R. I. (Robert Imre), 1931-
Abstract:: The flight behavior of Ips confusus (Lec.) was primarily studied under field conditions, but augmented with complementary laboratory studies whenever feasible. The experiments were mostly conducted in areas of endemic population levels, but also under epidemic and prairie conditions. The techniques and devices used in marking, releasing, attracting, and trapping...
Resource Type:: Dissertation
Full Text:: . J. A. Rudinsky, for his critical review and organization of this thesis. He too spent a great

Creator:: Pitman, Gary Boyd
Abstract:: The purpose of this study was to study in some detail host factors which influence the population dynamics of bark beetle. The dissertation objectives were to ascertain the applicability of utilizing osmotic pressure values and relative turgidity values of phloem tissue as indicators which reflect upon the physiological profile of...
Resource Type:: Dissertation
Full Text:: of this study. To Dr. Julius A. RUdinsky, Professor of Entomology, Oregon State University for

Creator:: Jantz, Orlo Kenneth
Abstract:: Behavioral responses exhibited by the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, to various attractant sources were investigated under both laboratory and field conditions. Tests were designed to observe olfactory responses. Results were correlated and compared with collections from sampling nets and with emergence patterns. Field data were collected during the flight...
Resource Type:: Dissertation
Full Text:: Rudinsky (143). A re- view of literature concerning the physiology of the Douglas-fir beetle reveals an

Creator:: Hendrickson, William Henry
Abstract:: Factors considered were phloem moisture, sour-phloem (which may be furthered by the presence of ample phloem moisture), oleoresin of the host, and the presence of unmated female beetles in suitable host material. Levels of phloem moisture present in variously prepared logs in the field ranged from about 100 to upwards...
Resource Type:: Dissertation
Full Text:: research reported here would include first of all, Dr. J. A. Rudinsky of the Oregon State University

Creator:: Stoszek, Karel Josef
Abstract:: The study (1) describes the life cycle of P. nebulosus, (2) examines stimuli that may cause the beetles to locate brood material, and (3) establishes the relationship between moisture stress in Douglas-fir and colonization by P. nebuZosus.and other meristem insects. (1) Development of P. nebulosus goes through the egg stage,...
Resource Type:: Dissertation
Full Text:: Dr. Julius A. Rudinsky for suggesting the study problem, for support in thesis planning

Creator:: Swaby, James Archie
Abstract:: The sinuous flight behavior of male Douglas-fir tussock moths, Orgyia pseudotsugata, (McD.), is characterized by positive anemotaxis and positive chemoklinotaxis and varies depending on distance from the pheromone source, population density, and time of day. Visual cues play a minor role in close-range orientation to a pheromone source, but males...
Resource Type:: Dissertation
Full Text:: . Appreciation is extended to Dr. Julius A. Rudinsky for accepting me into a graduate study program under his

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