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The biology of the brown orchard mite, Bryobia arborea Morgan and Anderson (Acarina : Tetranychidae) on stone fruit trees in The Dalles, Oregon area

Creator:: Burts, Everett C.
Resource Type:: Masters Thesis
Full Text:: STONE 'RUIT TREES L\1 THE DALLES, OREGON AREA EVERETT C BURTS A THESIS submitted to OREGON STATE

The biology of the blister mites, Eriophyes SPP., of pear and apple in the Pacific Northwest

Creator:: Burts, Everett C.
Resource Type:: Dissertation
Full Text:: PACITC )RTT.T by C A ?HSTS subitt.d to STATP COLL1!ß in partiai Jf:'1irrt of the riuireents

Insects associated with black stain root disease of Douglas-fir in western Oregon

Creator:: Witcosky, Jeffrey John
Abstract:: The root systems of Douglas-fir trees infected with Verticicladiella wagenerii and assigned by crown color and terminal growth characteristics to several stages of decline were excavated at three widely separated sites in the Coast Range of Oregon. Data were gathered on insect species present, extent of colonization of the root...
Resource Type:: Masters Thesis
Full Text:: Stain Root Disease of Douglas-fir in Western Oregon. Abstract approved: Redacted for Privacy ee C

Habits and control of the Willamette mite Eotetranychus willamettei (McGregor) and related species in Hood River valley

Creator:: Olney, Vernon William
Resource Type:: Masters Thesis
Full Text:: appreciation to Dr. Don C. Mote for his encouragement and helpful guidance in this work. To Dr. Charles li

The European earwig, its life history, habits and natural enemies

Creator:: Stearns, Howard Cecil
Resource Type:: Masters Thesis
Full Text:: pest have occurred in Portland, Oregon, Seattle, Washing- ton, Vanouver and. New Weetminister, B. C

Some factors in the development of northwestern entomology

Creator:: Bonnell, Daniel Ernest
Resource Type:: Dissertation
Full Text:: to secure the necessary data in connection with c' rtain phases of research or study that were based

A revision of the genus Deraeocoris Kirschbaum (Heteroptera:Miridae) from western America north of Mexico

Creator:: Razafimahatratra, Vincent de Paul
Abstract:: The genus Deraeocoris Kirschbaum of western America north of Mexico was revised. Approximately 10,000 specimens from the Nearctic Region were examined. Taxonomic characters used by previous authors were reevaluated. In addition to the male parameres, the male vesica and the female posterior wall of the bursa copulatrix and sclerotized rings...
Resource Type:: Dissertation
Full Text:: course of this study. I wish to extend my thanks to Dr. R. C. Froeschner,Smithsonian In- stitution, U.S

Factors influencing pesticide resistance in Psylla pyricola Foerster and susceptibilty in its mirid predator, Deraeocoris brevis Knight

Creator:: Baan, Hugo E., van de
Abstract:: Factors influencing pesticide susceptibility and resistance were studied in Psylla pyricola Foerster, and its mirid predator, Deraeocoris brevis Knight in the Rogue River Valley, Oregon. Factors studied were at the biochemical, life history, and population ecology levels. Studies on detoxification enzymes showed that glutathione S-transferase and cytochrome P-450 monooxygenase activities...
Resource Type:: Dissertation
Full Text:: ; Westigard et al. 1979; Follett et al. 1985; Burts et al. in press). In the Pacific Northwest most

Monitoring pesticide resistance in Psylla pyricola Foerster from western Oregon pear orchards

Creator:: Follett, Peter A.
Abstract:: A modified slide-dip bioassay was used to survey and establish baseline resistance levels in Psylla pyricola Foerster from western Oregon orchards to four pesticides. Orchards selected in the Hood River, Rogue River and Willamette Valleys spanned a wide range of environmental and management conditions. During the study period of 1982-1983,...
Resource Type:: Masters Thesis
Full Text:: the tree (temperatures above 7 °C). Burts (1983) compared a soft (selective) pesticide program with

The potential of endemic natural enemies to suppress pear psylla, Cacopsylla pyricola Förster, in the Hood River Valley, Oregon

Creator:: Booth, Steven R.
Abstract:: This thesis addressed the potential of endemic predaceous and parasitic arthropods of the Hood River Valley, Oregon to suppress the pear psylla, Cacopsylla pyricola F8rster. Natural enemies adequately suppressed psylla in three of seven unsprayed orchards of differing vegetational settings, orchard age, and size. Relatively few psylla natural enemies dispersed...
Resource Type:: Dissertation
Full Text:: during mid-season, and C) unsprayed mini-orchards, mature pear blocks, and young commercial planting

ScholarsArchive@OSU

The biology of the brown orchard mite, Bryobia arborea Morgan and Anderson (Acarina : Tetranychidae) on stone fruit trees in The Dalles, Oregon area

The biology of the blister mites, Eriophyes SPP., of pear and apple in the Pacific Northwest

Insects associated with black stain root disease of Douglas-fir in western Oregon

Habits and control of the Willamette mite Eotetranychus willamettei (McGregor) and related species in Hood River valley

The European earwig, its life history, habits and natural enemies

Some factors in the development of northwestern entomology

A revision of the genus Deraeocoris Kirschbaum (Heteroptera:Miridae) from western America north of Mexico

Factors influencing pesticide resistance in Psylla pyricola Foerster and susceptibilty in its mirid predator, Deraeocoris brevis Knight

Monitoring pesticide resistance in Psylla pyricola Foerster from western Oregon pear orchards

The potential of endemic natural enemies to suppress pear psylla, Cacopsylla pyricola Förster, in the Hood River Valley, Oregon

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