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Creator:: Atkins, Michael D.
Resource Type:: Dissertation
Full Text:: temperatures ne&r the threshold for free fIlght. When preconditioned in dry atr at roon temperature for 16

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:: associate professor R. R. Michael f.rom the School of Engineering for his help with the electronic

Creator:: King, Keith Irl
Abstract:: Oxygen uptakes of Douglas-fir beetles collected during November 1969 through April 1970 were measured at different experimental temperatures. The oxygen uptakes of adult beetles increased at each experimental temperature as the seasons progressed from winter to spring. The larval and pupal Douglas-fir beetles, collected in February 1970, had lower oxygen...
Resource Type:: Masters Thesis
Full Text:: correlation coefficients (r) between log oxygen uptake and temperature ranged from 0.923 to 0.979. The OSU

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:: rnanuscript. r arn grateful to Dr. w-illiarn P. Nagel, Departrnent of Ento- rnology, oregon State University

Creator:: Johnsey, Richard Lee
Abstract:: The objectives of this study were: 1) to learn the life history and habits of Medetera aldrichii Wheeler and a Lonchaea sp. in association with the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, in western Oregon and Washington; 2) to determine if the larvae of M. aldrichii were predaceous on the Douglas-fir...
Resource Type:: Masters Thesis
Full Text:: granary mites, Caloglyphus berlesei Michael (Acarina:Tyroglyphidae). The cage was checked daily and

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:: Microbiology assisted with work airning to identify the causal agent of sour-phloern. Dr. H. R. Vinyard of the

Creator:: Fitzgerald, T. D. (Terrence D.), 1941-
Abstract:: The bionomics of Medetera aldrichii Wheeler (Diptera: Dolichopodidae), a predator of the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins (Coleoptera:Scolytidae)), was investigated in western Oregon. The predator pupated in host galleries proximal to bark beetle ventilation holes. The tendency of prepupal larvae to form pupal cells near illuminated areas in a photo-response...
Resource Type:: Dissertation
Full Text:: the granary mite Caloglyphus berlesei Michael (Acarina: Tyroglyphidae). As part of an effort to

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