Index Catalog // ScholarsArchive@OSU

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:: RICHARD FRANKLIN SCHMITZ for the M. S. in Entomology ----~--~~~--(Name) (Degree) (Major) Date thesis is

The Thysanoptera of Oregon

Creator:: Post, Richard Lewis
Resource Type:: Dissertation
Full Text:: . Dr. W. J. Chamberlin, Oregon State College, who was the writer's major professor, for constructive

Jerking behavior among phytoseiid mite species (Acari: Phytoseiidae)

Creator:: Blackwood, J. Scott
Abstract:: Jerking, which we defined as a pronounced and often repeated lunging of the entire body, was studied in larvae among seven species of phytoseiid mites, and in the nymphal stages of Neoseiulus fallacis (Garman). This behavior was observed in all active immature stages of N. fallacis, and in larvae of...
Resource Type:: Masters Thesis
Full Text:: : Phytoseiidae) AN ABSTRACT OF THE THESIS OF J. Scott Blackwood for the degree of Master of Science in

Ecology of mites on pomaceous fruit trees and related wild hosts in Hood River Valley

Creator:: Jorgensen, Clive Darrel
Abstract:: The ecological interrelationships of mites occurring in and near the Hood River Valley, Oregon, pome fruit orchards were investigated to determine the possibility of an integrated control program using the species already present. Survey sampling methods were used to study mites on wild hosts (Crataegus douglasii Lindl., Crataegus columbiana Howell,...
Resource Type:: Dissertation
Full Text:: wild hosts (Crataegus douglasii Lindl., Crataegus columbiana Howell, and Amelanchier florida Lindl

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Creator:: Dreves, Amy J.
Abstract:: Four sampling techniques were evaluated to estimate clover aphid, Nearctaphis bakeri (Cowen), abundance in red clover fields in the Willamette Valley. The Berlese funnel method detected one to four times more aphids than other sampling techniques. Visual assessment often underestimated the high aphid densities during the flowering and seeding of...
Resource Type:: Masters Thesis
Full Text:: clover aphid, Nearctaphis bakeri (Cowen) in red clover AN ABSTRACT OF THE THESIS OF Amy J. Dreves for

Relationships between forest-floor invertebrate distribution, movement, and microclimate under alternative riparian management practices

Creator:: Rykken, Jessica J.
Abstract:: Headwater streams and their riparian zones are a common, yet poorly understood, component of Pacific Northwest landscapes. I sought to describe the ecological significance of headwater stream riparian zones as habitat for forest-floor invertebrate communities, and to assess how alternative management strategies for riparian zones may impact these communities. I...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jessica J. Rykken for the

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

Creator:: Halaj, Juraj
Abstract:: This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition of arboreal spiders in western Oregon. In 1993, I compared the spider communities of several host-tree species which have different branch structure. I also assessed...
Resource Type:: Dissertation
Full Text:: members, Drs. David A. Perry and Arthur J. Boucot, were always encouraging and ready to provide good

Orange tortrix : parasitoid complex and thermal constants for egg hatch

Creator:: Coop, Leonard Bryan
Abstract:: An investigation was conducted in 1980 and 1981 on the larval parasitoid complex of the orange tortrix, Argyrotaenia citrana (Fern.), a major contaminant in cane fruits (Rubus spp.) in the Pacific Northwest. A total of 13 parasitoid species were reared from 1,350 larvae predominantly collected from red raspberries in western...
Resource Type:: Masters Thesis
Full Text:: committee, J. Miller, R. Petersen, and E. Fichter, also provided valuable comments and advice before and

Foraging ecology of pollinators in the early stages of secondary succession in the western hemlock (Tsuga heteropohylla (Raf.) Sarg.) zone of the Oregon Coast Range

Creator:: Burikam, Intawat
Abstract:: The early stages of secondary succession of the McDonald and Paul Dunn State Forests, Corvallis, Oregon, were grouped into three stages; herb, herb-shrub, and shrub, based on vegetation types. Flowers of herbaceous species and residual shrubs dominated in the early years after clear-cutting. Woody plants became increasing abundant in the...
Resource Type:: Dissertation
Full Text:: and burning in the western hemlock zone of Oregon have been reviewed by Franklin and Dyrness (1973

Taxonomic revision of Lichnanthe Burmeister with studies on the biology of L. rathvoni (Leconte) (Coleoptera:Scarabaeidae)

Creator:: Carlson, David Craig
Abstract:: The genus Lichnanthe Burmeister contains eight extant and one fossil species which are strictly nearctic in distribution. The subfamily Glaphyrinae, however, is distributed nearly world-wide. Five species were previously described and three are described as new herein. All eight extant species are described in detail herein, synonomies are made current,...
Resource Type:: Dissertation
Full Text:: laboratory and in the field. Dr. J. D. Lattin, Dr. G. W. Krantz, Dr. P. Oman, Dr. P. D. Dawson, Dr. E. J

ScholarsArchive@OSU

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

The Thysanoptera of Oregon

Jerking behavior among phytoseiid mite species (Acari: Phytoseiidae)

Ecology of mites on pomaceous fruit trees and related wild hosts in Hood River Valley

Seasonal abundance, distribution, and migration of the clover aphid, Nearctaphis bakeri (Cowen) in red clover

Relationships between forest-floor invertebrate distribution, movement, and microclimate under alternative riparian management practices

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

Orange tortrix : parasitoid complex and thermal constants for egg hatch

Foraging ecology of pollinators in the early stages of secondary succession in the western hemlock (Tsuga heteropohylla (Raf.) Sarg.) zone of the Oregon Coast Range

Taxonomic revision of Lichnanthe Burmeister with studies on the biology of L. rathvoni (Leconte) (Coleoptera:Scarabaeidae)

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