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The effect of cold temperatures on the length of diapause of the spruce budworm (Choristoneura fumiferana (Clem.)

Creator:: Fellin, David G.
Resource Type:: Masters Thesis
Full Text:: particularly to: Dr. kaul O. Hitcher, and Dr. Julius A. Rudinsky, Head and Associate krofessor, respectively

Some environmental factors affecting development and emergence of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins (Coleoptera: Scolytidae), in the laboratory

Creator:: Ryan, Roger B.
Resource Type:: Masters Thesis
Full Text:: PSEUDCTS13A HOPK II'S (CoLJoPTf : SCOLtDZ), flr1rEE LRATOY !OG DÄ RIA! A TitSIS cub.itted to OREGON

A field approach to study the flight behavior of bark beetle populations (Coleoptera Scolytidae)

Creator:: Gara, R. I. (Robert Imre), 1931-
Resource Type:: Masters Thesis
Full Text:: professor, Dr. Julius A. Rudinsky, for his aid in organisation and critica], review of this thesis. To

Insect enemies of Dendroctonus pseudotsugae Hopk. : indentification of their immature stages and distribution in standing trees

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:: study and the preparation of this thesis: To Dr. Julius A. Rudinsky who helped outline the pro

Some environmental factors influencing rearing of the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) under laboratory conditions

Creator:: Pitman, Gary Boyd
Resource Type:: Masters Thesis
Full Text:: acknowledgments are due, as follows: To Dr. Julius A. Rudinsky, Professor of Entomology, Oregon State

The effect of competition on the population dynamics of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk., in Oregon

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:: : To Dr. Julius A. Rudinsky, Professor of Forest Entomology, Oregon State University, who outlined

The flight and olfactory behavior of checkered beetles (Coleoptera cleridae) predatory on the douglas-fir beetle

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:: . Julius A. Rudinsky, mY rnajor professor, for his guid- ance of the research and reviewing of the thesis

Sound production in three sympatric Ips (Coleoptera:Scolytidae) species co-inhabiting Sitka spruce (Picea sitchensis)

Creator:: Oester, Paul T.
Abstract:: Three sympatric species of Ips, colonizing Sitka spruce, were investigated with regard to their infestation habits, stridulating apparatus and acoustic signals. The above phenomena are evaluated qualitatively and/or quantitatively and the acoustic signal differences are proposed as a possible factor for maintaining species isolation, although function is not shown. Field...
Resource Type:: Masters Thesis
Full Text:: Redacted for PrivcyAbstract approved: Julius A. Rudinsky Three sympatric species of Ips, colonizing Sitka

Sound production in Leperisinus oregonous Blackman and L. californicus Swaine (Coleoptera:Scolytidae)

Creator:: Vernoff, Suellen
Abstract:: Both Leperisinus oregonus and L. californicus are bark beetle species which emerge from Fraxinus latifolia brood logs as sexually immature adults and disperse to living ash. Occasional field observations suggest that, for overwintering and maturation feeding, L. oregonus enter trunks and branches, whereas L.; californicus enter twig crotches, buds and...
Resource Type:: Masters Thesis
Full Text:: . Julius A. Rudinsky Both Leperisinus oregonus and L. californicus are bark beetle species which emerge

Diurnal and seasonal flight patterns of bark beetles (Coleoptera : Scolytidae) associated with Douglas-fir forests of western Oregon

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:: preparation and completion of this study: To my advisors I Dr. Julius A. Rudinsky for his guidance and

ScholarsArchive@OSU

The effect of cold temperatures on the length of diapause of the spruce budworm (Choristoneura fumiferana (Clem.)

Some environmental factors affecting development and emergence of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins (Coleoptera: Scolytidae), in the laboratory

A field approach to study the flight behavior of bark beetle populations (Coleoptera Scolytidae)

Insect enemies of Dendroctonus pseudotsugae Hopk. : indentification of their immature stages and distribution in standing trees

Some environmental factors influencing rearing of the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae) under laboratory conditions

The effect of competition on the population dynamics of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk., in Oregon

The flight and olfactory behavior of checkered beetles (Coleoptera cleridae) predatory on the douglas-fir beetle

Sound production in three sympatric Ips (Coleoptera:Scolytidae) species co-inhabiting Sitka spruce (Picea sitchensis)

Sound production in Leperisinus oregonous Blackman and L. californicus Swaine (Coleoptera:Scolytidae)

Diurnal and seasonal flight patterns of bark beetles (Coleoptera : Scolytidae) associated with Douglas-fir forests of western Oregon

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