Index Catalog // ScholarsArchive@OSU

Mechanical brush control on steep slopes in southwest Oregon

Creator:: Steffan, Daryl Joseph
Abstract:: In this paper the extent of the steep slope brush conversion problem will be estimated. Potential solutions and development should be commensurable with the extent of the problem. The state-of-the-art of steep slope site preparation and conversion will be described. Feasible alternatives to these limited options will be developed.
Resource Type:: Capstone Project

Changes in plant communities following rangeland brush control

Creator:: Findley, Roger Raymond
Abstract:: Recently, the big sagebrush taxa has been split into subspecies and forms. Four habitat types related to subspecies of big sagebrush were studied in Eastern Oregon. Response of understory vegetation was measured following three range improvement techniques implemented on the four habitat types for several ages of treatment. Crown cover,...
Resource Type:: Masters Thesis
Full Text:: PLANT COMMUNITIES FOLLOWING RANGELAND BRUSH CONTROL Redacted for privacy Abstract approved: Dr

The development of leaf area and biomass in the whiteleaf manzanita (Arctostaphylos viscida Parry.) brushfields of southwest Oregon

Creator:: Latt, Christopher R.
Abstract:: Arctostanhylos viscida is a broad-leaved, evergreen, sclerophylbus shrub which grows in northern California and the Siskiyou Mountain region of southwest Oregon. After site disturbance, A. viscida competes with conifer regeneration, and may dominate a site for ninety years. This study examined the rate at which full site occupancy occurs in...
Resource Type:: Masters Thesis

The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity

Creator:: Schumacher, Stacy
Abstract:: Yellow starthistle (Centaurea solstitialis L.) is an introduced Asteraceae that has become established on 10 million acres in the Pacific Northwest and California. This weed functions as an annual or short-lived perennial and depends on seeds for reproduction. Strategies of control that reduce plant fitness or lower seed production or...
Resource Type:: Masters Thesis
Full Text:: northeastern Oregon 47 14. Percent infestation of yellow starthistle seedheads of biological control agents

Sampling methods, biology and management of the mint flea beetle in central Oregon peppermint

Creator:: Morris, Mark A.
Abstract:: Sampling techniques were evaluated to quantify immature mint flea beetle (MFB), Longitrsus waterhousei Kutschera (Coleoptera: Chrysomelidae), on peppermint (Mentha piperita L.), in central Oregon. During the study period, 1985-1988, soil samples of 350 cm³ were effective for collecting immature MFB. Sifting soil samples through screens was effective for estimating post-feeding...
Resource Type:: Masters Thesis
Full Text:: the detection, biology and control of immature MFB in peppermint in central Oregon. The following

Biology and management of the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae), in sweet cherry

Creator:: Omeg, Michael Kent
Abstract:: The seasonal biology of the obliquebanded leafroller, Choristoneura rosaceana (Harris), was studied to improve its management in Mid-Columbia area sweet cherry orchards. Overwintering OBLR larvae began to emerge from hibernacula at bud stage 2 (side green). Most overwintering larvae emerged from hibernacula within three weeks of first bud swell and...
Resource Type:: Masters Thesis
Full Text:: evaluated for OBLR control. There was no improvement in control by applying delayed dormant sprays before

Weed management for giant reed (Arindo donax) biomass production in Oregon

Creator:: Attarian, Amir
Abstract:: Giant reed (Arundo donax L.) is a candidate to provide feedstock for the Portland General Electric power plant in Boardman, Oregon. Giant reed is a fast perennial grass, producing 23-27 metric tons ha⁻¹ of biomass and has the ability to adapt to diverse environments making it a good candidate for...
Resource Type:: Masters Thesis
Full Text:: importance of weed management and control in the newly established fields in Oregon, it is necessary to

Weed suppression in vegetables with residues of 'micah' barley (Horedeum vulgare L.) and other spring cereals

Creator:: Chongwe, Edgar Happy
Abstract:: Three experiments whose objectives were to investigate cover crop kill by winter freeze, weed suppression by 'Micah' barley and other spring cereals, and allelopathic potential of cereal covers were conducted at the Vegetable Research Farm and in the greenhouse and growth chamber facilities at OSU in 1989/90. Kill by winter...
Resource Type:: Masters Thesis
Full Text:: 1989/90. Complementary usage of herbicides and residues for weed control is suggested. Residues

Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides

Creator:: Kunjo, Ebrima Madi
Resource Type:: Masters Thesis
Full Text:: western Oregon. Diclofop ((+)-2-(4-(2,4-dichlorophenoxy) phenoxy] propanoic acid) (Hoelon) has been

Biological control of purple loosestrife Lythrum salicaria by two chrysomelid beetles Galerucella pusilla and G. calmariensis

Creator:: Schooler, Shon
Abstract:: In the first part of this study we monitored the development of biological control of purple loosestrife Lythrum salicaria over a six-year period at Morgan Lake in western Oregon. In 1992, two beetles, Galerucella pusilla and G. calmariensis (Coleoptera: Chrysomelidae), were released to control the wetland weed at this test...
Resource Type:: Masters Thesis
Full Text:: Introduced to Control Purple Loosestrife Lythrum salicaria in Oregon Shon S. Schooler, Peter B. McEvoy

ScholarsArchive@OSU

Mechanical brush control on steep slopes in southwest Oregon

Changes in plant communities following rangeland brush control

The development of leaf area and biomass in the whiteleaf manzanita (Arctostaphylos viscida Parry.) brushfields of southwest Oregon

The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity

Sampling methods, biology and management of the mint flea beetle in central Oregon peppermint

Biology and management of the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae), in sweet cherry

Weed management for giant reed (Arindo donax) biomass production in Oregon

Weed suppression in vegetables with residues of 'micah' barley (Horedeum vulgare L.) and other spring cereals

Emergence and growth of nine accessions of diclofop-resistant Italian ryegrass (Lolium multiflorum L.) and multiple resistance to other herbicides

Biological control of purple loosestrife Lythrum salicaria by two chrysomelid beetles Galerucella pusilla and G. calmariensis

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