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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:: significant differences in aphid attractiveness to the different colors were found among water pan traps

Phytoseiid mites (Parasitiformes:Phytoseiidae) of commerical crops in the Willamette Valley, Oregon and pesticide resistance in the principal species Typhlodromus pyri Scheuten

Creator:: Hadam, John J.
Resource Type:: Masters Thesis
Full Text:: would also like to thank Dr. Dave McIntire, Dr. Gerald Krantz, Steven Booth and Gary Parsons for their

Biology of some Oregon rain bettles, Pleocoma spp., associated with fruit trees in Wasco and Hood River counties

Creator:: Ellertson, Floyd Elroy
Resource Type:: Dissertation
Full Text:: .aritza Bodine ACKN '00 . NT Grateful acknowledc ment is made to Dr . ul o. Ritch r, Chairman, D p

The effect of photoperiod and temperature on ovarian development and fat production in Culex peus Speiser (Diptera:Culicidae)

Creator:: Skultab, Seeviga
Abstract:: The effect of photoperiod and temperature on ovarian follicle development and fat production was studied in a colonized population of CuZex peus Speiser from Philomath, Oregon. Females were subjected to simulated fall conditions of photoperiod and temperature. Under a combination of short photoperiod and low temperature, there were various effects...
Resource Type:: Masters Thesis
Full Text:: for financial support through my graduate education at Oregon State University. I am grateful to Dr

The Anopheline mosquitoes of Oregon, with suggestions for their control

Creator:: Anderson, Ernest Clifford
Resource Type:: Dissertation
Full Text:: NOWLEDG1E The writer wishes to offer hie sincere thanks and ap- predation to Dr. Don C. Lote, Head of

The morphology and taxonomic significance of the male genitalia of Coenonycha (Coleoptera, Scarabaeidae)

Creator:: Davidson, Jean Hoyt Puckle
Abstract:: The genus Coenonycha contains 30 described species of small to medium sized scarabs. They are found in the arid and semi-arid regions of western United States and northern Baja California. The adults feed at night on several genera of xerophylous plants. An examination of the male genitalia of the 19...
Resource Type:: Masters Thesis
Full Text:: California, Riverside, California; Dr. W. F. Barr, University of Idaho, Moscow, Idaho; Dr. 0. L. Cartwright

The species composition and adaptations of insects in an intermittent stream in western Oregon

Creator:: Tew, Michael Peter
Abstract:: The insect fauna of a small second order intermittent stream near Corvallis, Benton County, Oregon was studied. The species composition was determined, attempts were made to monitor migration to the stream, qualitative and quantitative benthos samples were taken, emergence was sampled, the dry stream bed was examined for forms of...
Resource Type:: Masters Thesis
Full Text:: : Dr. N. H. Anderson for serving as my major professor. Dr. J. D. Lattin for his very helpful review

A revision of the genus Colladonus (Homoptera, Cicadellidae)

Creator:: Nielson, Mervin William
Resource Type:: Dissertation
Full Text:: which would have made this stuq impossible. To Dr. Paul O. Ritcher ot Oregon State College, who as

The seasonal occurrence and distribution of stoneflies (Plecoptera) of a western Oregon stream

Creator:: Kerst, Cary Dean
Abstract:: Plecoptera were collected from four sampling stations selected to represent a range of conditions on Oak Creek, a small woodland stream originating in the foothills of the Oregon Coast Range. The elevation of Site I was 700 ft. while the lowest site was located at 225 ft. Monthly benthos samples...
Resource Type:: Masters Thesis
Full Text:: appreciation is expressed to the following: Dr. N. H. Anderson for serving as my major professor and

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

Creator:: Bishop, Guy William
Resource Type:: Masters Thesis
Full Text:: writer wishes to express his appreciation to Dr. Paul O. Hitcher, Head of the Department of Entomology

ScholarsArchive@OSU

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

Phytoseiid mites (Parasitiformes:Phytoseiidae) of commerical crops in the Willamette Valley, Oregon and pesticide resistance in the principal species Typhlodromus pyri Scheuten

Biology of some Oregon rain bettles, Pleocoma spp., associated with fruit trees in Wasco and Hood River counties

The effect of photoperiod and temperature on ovarian development and fat production in Culex peus Speiser (Diptera:Culicidae)

The Anopheline mosquitoes of Oregon, with suggestions for their control

The morphology and taxonomic significance of the male genitalia of Coenonycha (Coleoptera, Scarabaeidae)

The species composition and adaptations of insects in an intermittent stream in western Oregon

A revision of the genus Colladonus (Homoptera, Cicadellidae)

The seasonal occurrence and distribution of stoneflies (Plecoptera) of a western Oregon stream

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

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