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Creator:: Harwood, Willard Garland
Abstract:: Three coleopterous predators associated with the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins in a second growth forest of Douglas-fir (Pseudotsugae menziesii (Mirb. ) Franco) in western Oregon are Enoclerus sphegeus Fabriciup, E, lecontei Wolcott, and Thanasirnus undatulus Say. A study was undertaken with the following objectives: (1) to determine the diurnal...
Resource Type:: Masters Thesis
Full Text:: is defined by the Arnerican Society for Testing Materials as, the nonaquous secretion of resin

Creator:: Schmitz, Richard Franklin
Abstract:: The effect of competition on the brood survival of the Douglas fir beetle Dendroctonus pseudotsugae Hopkins, in down or windthrown Douglas-fir Pseudotsuga menziesii (Mirb.) Franco was studied in the field and the laboratory. The investigation of the role of competition in the population dynamics of the beetle had four objectives:...
Resource Type:: Masters Thesis
Full Text:: , Pseudotsuga menziezii (Mirb.) Fran co, the most important timber species of western North America. Hopkins

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:: The biologies of two dipterous predators of Dendroctonus

Creator:: Cowan, Bruce Dudley
Abstract:: Six species of Cleridae, including Enoclerus spegeus Fabricius, E. lecontei Wolcott, E. schaefferi (Barr), E. eximius Mannerheim, Thanasimus undatulus Say, and an undescribed species of Enoclerus, were found on Douglas-fir in western Oregon. E. sphegeus was the only clerid of the six species studied which was primarily associated with the...
Resource Type:: Masters Thesis
Full Text:: The biologies of predators (Coleoptera: cleridae) of the

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:: (Coleopteran Scolytidae) to synthetic forntalin. Annals of the Entomological Society of America 63:661-664

Creator:: Howse, Gordon M.
Resource Type:: Dissertation
Full Text:: one of 14 the most abundant and widespread predators in western North America. The larvae

Creator:: Kline, LeRoy N.
Abstract:: The objectives undertaken in this study were: 1) to develop means of identifying the immature stages of the known insect predators and parasites of the Douglas-fir beetle; 2) to investigate the possible distribution, spatially and/or temporal, of the known insect predators and parasites in standing trees infested by the Douglas-fir...
Resource Type:: Masters Thesis
Full Text:: in the coniferous forests of western North America. It is an important enemy of many species of

Creator:: Daterman, Gary E.
Abstract:: The study was undertaken to determine the seasonal and diurnal flight patterns of scolytid beetles inhabiting a second growth forest of Douglas-fir (Pseudotsuga menziesii (Mirb.)Franco) in western Oregon. Air temperatures, relative humidity, light intensity, and wind velocities were recorded for evaluation of their influence on flight activity. The insects were...
Resource Type:: Masters Thesis
Full Text:: (Coleoptera: scolytidae) associated with douglas fir forests of Western Oregon AN ABSTRACT OF THE THESIS OF

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:: is presented OF the THE THESIS Ph. D. in tn"s,E) OF Entomology (Major) Fab^ /q./ HbsDate TitIe

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