Index Catalog // ScholarsArchive@OSU

Parasites and predators of Dendroctonus ponderosae Hopkins (Coleoptera : Scolytidae) in ponderosa pine

Creator:: Billings, Ronald F.
Abstract:: The bark beetle Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) has caused severe mortality in recent decades to young stands of ponderosa pine in the western United States. Insect parasites and predators, believed to be of importance in the population dynamics of the beetle, were the subject of the thesis research, conducted...
Resource Type:: Masters Thesis

Certain factors affecting colonization of Ponderosa pine by Ips confusus (Leconte) (Coleoptera : Scolytidae)

Creator:: Pitman, Gary Boyd
Abstract:: The purpose of this study was to study in some detail host factors which influence the population dynamics of bark beetle. The dissertation objectives were to ascertain the applicability of utilizing osmotic pressure values and relative turgidity values of phloem tissue as indicators which reflect upon the physiological profile of...
Resource Type:: Dissertation
Full Text:: of ponderosa pine girdled for one month, one year and five years......, 127 17. Summary of the

Thelytokous and dioecious populations of Phenacaspis pinifoliae (Fitch), (Homoptera : Diaspididae)

Creator:: Stimmann, Michael W.
Abstract:: Two populations of the pine needle scale, Phenacaspis pinifoliae (Fitch), were studied. One population was located in Corvallis, Oregon, and the other population was located near Santiam Pass, Oregon. Both populations were feeding on Pinus contorta. The Corvallis population was unisexual, univoltine, and over wintered as both eggs and adult...
Resource Type:: Masters Thesis
Full Text:: Phenacaspis pinifoliae on "Scotch pine" in Saskatchewan, Canada. The population was bisexual and univoltine

Status, distribution and seasonal variation of filbert aphid resistance to selected insecticides in the Willamette Valley, Oregon

Creator:: Katundu, Juma
Abstract:: Levels of resistance to six selected insecticides of eleven field populations of the filbert aphid Mvzocallis coryli (Goetze) were determined by using the leaf-dip residue technique. Test insecticides included compounds widely used in commercial filbert orchards, namely, carbaryl, diazinon, endosulfan, phosalone, fenvalerate and oxydemetonmethyl. Aphid samples were collected within a...
Resource Type:: Masters Thesis
Full Text:: , Painter and Jones 1958). Due to the presence of the pest complex described above and the need to reduce

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Creator:: Cacka, Joseph Francis
Resource Type:: Masters Thesis
Full Text:: Biology 6 Control Strategies and Methods 7 Sampling 10 METHODS AND MATERIALS 12 Field Locations 12

Management of variegated cutworm in peppermint

Creator:: Coop, Leonard Bryan
Abstract:: A pest management program for variegated cutworm (VC), Peridroma saucia (Hubner), in Oregon peppermint was developed based on studies of pheromone trapping, sampling methods, and economic thresholds. Pheromone traps effectively trapped VC males and were used to reflect development and oviposition trends. Trap height was linearly correlated to moth catch...
Resource Type:: Dissertation
Full Text:: thresholds (number of larvae/1000 cm2 as a function of peppermint oil price, cost of control, and field class

Miscellaneous beneficial and pest insects : hazelnuts

Creator:: Drapek, Raymond and Fisher, Glenn C.
Resource Type:: Conference Proceeding
Full Text:: and pest insects Hazelnuts Raymond Drapek and Glenn Fisher Department or Entomology Oregon State

Comparative emigration, immigration, and colonization of young apple trees by Typhiodromus pyri and Metaseiulus occidentalis in Hood River, Oregon

Creator:: Dunley, John
Resource Type:: Conference Proceeding
Full Text:: the Hood River Valley are effective natural enemies in the biological control of pest mites in apple

Spatial distribution of O-P resistance in the Hood River and Willamette Valleys

Creator:: Dunley, John E.
Resource Type:: Conference Proceeding
Full Text:: Oregon State University Corvallis, OR 97331 SPATIAL DISTRIBUTION OF O-P RESISTANCE IN THE HOOD RIVER AND

Interspecific predation and cannibalism in Metaseiulus occidentalis and Typhlodromus pyri (Acari: Phytoseiidae)

Creator:: MacRae, Ian V. and Croft, Brian A.
Resource Type:: Conference Proceeding
Full Text:: Metaseiulus occidentalis and Typhlodromus pyri are used individually in biocontrol programs for apple pest

ScholarsArchive@OSU

Parasites and predators of Dendroctonus ponderosae Hopkins (Coleoptera : Scolytidae) in ponderosa pine

Certain factors affecting colonization of Ponderosa pine by Ips confusus (Leconte) (Coleoptera : Scolytidae)

Thelytokous and dioecious populations of Phenacaspis pinifoliae (Fitch), (Homoptera : Diaspididae)

Status, distribution and seasonal variation of filbert aphid resistance to selected insecticides in the Willamette Valley, Oregon

Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Management of variegated cutworm in peppermint

Miscellaneous beneficial and pest insects : hazelnuts

Comparative emigration, immigration, and colonization of young apple trees by Typhiodromus pyri and Metaseiulus occidentalis in Hood River, Oregon

Spatial distribution of O-P resistance in the Hood River and Willamette Valleys

Interspecific predation and cannibalism in Metaseiulus occidentalis and Typhlodromus pyri (Acari: Phytoseiidae)

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Conference Section/Track

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search