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Assessing Petal-cutting bees (Megachile sp.) usage of Clarkia amoena (Onagraceae) petals through the lens of iNaturalist and a Garden Experiment

Creator:: Mead, Mallory
Abstract:: Farewell-to-spring (Clarkia amoena) is native to the Pacific Northwest and commonly found in gardens, due to its aesthetic value and purported benefits to pollinators. Oregon and Washington are home to five subspecies of C. amoena, yet commercially available seed is limited to C. amoena ssp. lindleyi and C. amoena cultivars....
Resource Type:: Undergraduate Thesis
Full Text:: by Mallory Mead A THESIS submitted to Oregon State University in

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Creator:: Thomasson, James E.
Abstract:: The effects of five tillage treatments on soil bulk density and mechanical impedance were examined on Newburg sandy loam soil in the Willamette Valley, Oregon, in 1987. Subsequent effects on seedling emergence and yield of carrots (Daucus carota L., cvs. Orlando Gold and Royal Chantenay) were also measured. Mechanical impedance...
Resource Type:: Masters Thesis
Full Text:: /ticiyltyre—in charge of major Head of Dep^ftment of Horticulture Dean of GragKjJate School i -' 'y

Effect of nitrogen rates, row spacings and population densities on yield and ear characteristics of sweet corn

Creator:: Yassen, Abdulameir Ali
Abstract:: The response of sweet corn Zea mays L. var. rugosa (cultivar 'Jubilee') to row spacing, nitrogen and population density at two planting dates was studied in a field experiment at the OSU Vegetable Research Farm in 1984. Variables included two row spacings, 75 cm and 90 cm, three nitrogen rates,...
Resource Type:: Masters Thesis
Full Text:: throughout this study. Recognition is also given to Dr. Dave Chilcote, Dr. Jim Baggett, and Dr. Ian

Storage quality of broccoli florets and evaluation of modified atmosphere packaging

Creator:: Cabezas, Amalia
Abstract:: The effect of some factors that can affect quality characteristics of broccoli florets in storage was evaluated. Quality characteristics of broccoli florets with different rates of field nitrogen (N) application (0, 90, 180, and 270 Kg N/ha from urea) were evaluated in modified atmosphere packaging (MAP) (B-900 Cryovac film) storage...
Resource Type:: Masters Thesis
Full Text:: Graduate School ^'"ojf/i^^^ I understand that my thesis will come part of the permanent collection of

Serial manure amendments : effects on soil properties and root rot of sweet corn

Creator:: Cox, Bonnie S. Hoffman
Abstract:: The effect of serial (multiple-year) organic matter (OM) amendment on soil properties has been described in some cropping systems, although less is known about the effect of serially amended field soils on soil-borne plant diseases. The objectives of this study were to describe the effects of the third and fourth...
Resource Type:: Masters Thesis
Full Text:: the ikluzte School I understand that my thesis will become part of the permanent collection of Oregon

Non-nutritive Sugars as a Management Tactic for Spotted-Wing Drosophila (Drosophila suzukii) and Non-Target Effects

Creator:: Price, Briana E.
Abstract:: With confirmation of non-nutritive sugar, erythritol, having insecticidal properties to Dipterans, this thesis research focuses on use of erythritol as a human-safe management tool for small berry and cherry pest, Drosophila suzukii, commonly referred to as spotted-wing drosophila. Drosophila suzukii is a destructive invasive fruit fly from Asia with an...
Resource Type:: Masters Thesis
Full Text:: Head of the Department of Horticulture Dean of the Graduate School I understand that

Response of strawberry plants to manganese nutrition

Creator:: Sabharwal, Sudarshan Lal
Abstract:: The effects of manganese nutrition on growth, mineral composition, carbohydrate and nitrogen metabolism, IAA oxidase and phenols of 'Northwest' strawberry plants are reported. Growth and mineral composition response were investigated in sand culture and Hoagland's solution 2 modified to contain 0.0, 0.5, 2.5, 12.5, 25.0, 62.5 and 125.0 ppm substrate...
Resource Type:: Dissertation
Full Text:: the Doctor of Philosophy (Name) (Degr&e) in Horticulture presented on ^^/^i

Plant hormone-induced defense responses against Botrytis cinerea

Creator:: Akagi, Aya
Abstract:: Several plant hormones, including ethylene and jasmonates, are known to mediate responses against biotic and abiotic stress. The first and second objectives of this thesis were (i) to elucidate the role of ethylene in defense responses against Botrytis cinerea and specifically (ii) to determine the potential contribution of ethylene response...
Resource Type:: Dissertation
Full Text:: the completion of this dissertation. I am also sincerely appreciative to my committee members, Jim

Primocane-fruiting blackberries : the effect of summer-pruning, tipping, and chilling on primocane morphology, fruiting season, and yield

Creator:: Thompson, Ellen
Abstract:: The effect of primocane management on flowering and fruiting patterns was studied in primocane-fruiting blackberry (Rubus subgenus Rubus, Watson) cultivars 'Prime-Jan'® and 'Prime-Jim'® over two years. Primocanes that were "soft-tipped" (upper 2-5 cm removed) at 1.0 m were compared to un-tipped canes. In both years, soft-tipped primocanes developed 2-3 fold...
Resource Type:: Masters Thesis
Full Text:: ‘Prime-Jim’® over two years. Primocanes that were “soft-tipped” (upper 2-5 cm removed) at 1.0 m were

Evaluating the Attractiveness of Pacific Northwest Native Plants to Insects and Gardeners

Creator:: Anderson, Aaron G.
Abstract:: Due to a growing body of literature documenting declines in pollinator populations, there has been increased public interest in pollinator conservation. In urban and suburban landscapes, many gardeners and urban land managers are interested in gardening for pollinators, particularly bees. Simultaneously, many homeowners and municipalities are interested in other aspects...
Resource Type:: Dissertation
Full Text:: . I conducted a three-year field study (2017-2019) to investigate the relative attractiveness of 23

ScholarsArchive@OSU

Assessing Petal-cutting bees (Megachile sp.) usage of Clarkia amoena (Onagraceae) petals through the lens of iNaturalist and a Garden Experiment

Effects of tillage-induced soil compaction on carrot seedlings emergence and yield

Effect of nitrogen rates, row spacings and population densities on yield and ear characteristics of sweet corn

Storage quality of broccoli florets and evaluation of modified atmosphere packaging

Serial manure amendments : effects on soil properties and root rot of sweet corn

Non-nutritive Sugars as a Management Tactic for Spotted-Wing Drosophila (Drosophila suzukii) and Non-Target Effects

Response of strawberry plants to manganese nutrition

Plant hormone-induced defense responses against Botrytis cinerea

Primocane-fruiting blackberries : the effect of summer-pruning, tipping, and chilling on primocane morphology, fruiting season, and yield

Evaluating the Attractiveness of Pacific Northwest Native Plants to Insects and Gardeners

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