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Biological control of crown gall with bacterial and fungal antagonists

Creator:: Cooksey, Donald Arthur
Resource Type:: Dissertation
Full Text:: Penicillium, Aspergillus, Bacillus, Pseudomonas, and A. radiobacter reduced the incidence of crown gall on

Interactions between fire and dwarf mistletoe in ponderosa pine

Creator:: Koonce, Andrea Lavender
Abstract:: The effects of dwarf mistletoe on fuel in precommercial ponderosa pine stands: Dwarf mistletoe and healthy stands were sampled by vertical planar intercept and whole tree biomass sampling techniques to measure fuel loading in ground and crown fuels. Differences in size, distribution, and vitality of fuel were shown to depend...
Resource Type:: Dissertation

The disease cycle of side rot of pear, caused by Phialophora malorum

Creator:: Sugar, David
Abstract:: Potential sources of inoculum of Phialophora malorum were investigated. P. malorum was found to be a soil-borne fungus whose role as a postharvest pathogen of pear is dependent upon passive dispersal with infested soil. P. malorum survived in soil under a wide range of conditions, with greatest survival in cool,...
Resource Type:: Dissertation
Full Text:: control. The Disease Cycle of Side Rot of Pear, Caused by Phialophora malorum by David Sugar A

The nature of Fusarium exclusion from coniferous forest soils : evidence of differential microbial involvement in forest vs. nursery soils

Creator:: Schisler, David Albert
Resource Type:: Masters Thesis
Full Text:: vs. Nursery Soils by David Albert Schisler A THESIS submitted to Oregon State University in

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

Creator:: Imper, David Kimberly
Abstract:: Twelve plots at six sites in southwestern Oregon were studied to determine the degree to which various soil characteristics are related to the occurrence and growth of Chamaecyparis lawsoniana and Thuja plicata. Soil profiles and vegetation were described in each plot, and measurements were made of insolation, soil and litter...
Resource Type:: Masters Thesis
Full Text:: Southwestern Oregon by David Kimberly Imper A THESIS submitted to Oregon State University in partial

Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon

Creator:: Whiting, Mark Carlos
Abstract:: Epiphytic, planktonic and benthic diatom assemblages were investigated in Netarts Bay, Oregon. Samples were collected for a one-year period from February 1980 to March 1981. A planktonic flora was observed only during periods of offshore enrichment when marine neritic species were abundant and were transported into the bay by tidal...
Resource Type:: Dissertation
Full Text:: : LC , z r-L? C. David McIntire Epiphytic, planktonic and benthic diatom assemblages were

Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon

Creator:: Kentula, Mary E.
Resource Type:: Dissertation
Full Text:: Dynamics of a Zostera marina L. Bed in Netarts Bay, Oregon Abstract Approved: C. David Mclntire This

Production dynamics of sediment-associated algae in two Oregon estuaries

Creator:: Davis, Michael W.
Abstract:: Sediment-associated gross primary production, oxygen uptake, microalgal biomass expressed as chlorophyll a concentration, macroalgal biomass and total organic matter concentration expressed as ash-free dry weight were measured monthly at medium sand, fine sand and coarse silt sites between 0.5 m and 2.0 m above MLLW during an entire year at...
Resource Type:: Dissertation

Ozone flux in Helianthus annuus (L.)

Creator:: Smith, Elaine D.
Abstract:: Sunflower (Helianthus annuus L., cv. NK894) seedlings, grown hydroponically, were exposed to ozone concentrations of 0.0, 0.1, 0.2, and 0.3 ppm at 60% RH, or 0.0 and 0.3 ppm at 30% and 90% RH, for 6 h/d, for four consecutive days, at ages 15 to 18 days from seeding. Plant...
Resource Type:: Masters Thesis
Full Text:: Privacy David T. T44kei Sunflower (Helianthus annuus L., cv. NK894) seed- lings, grown hydroponically

Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

Creator:: Steinman, Alan D.
Abstract:: Effects of current velocity, irradiance, and grazing on the biomass, taxonomic structure, physiognomy, and chemical composition of lotic algal assemblages were investigated. Four experiments, lasting 32 to 75 days, were conducted in laboratory streams to determine how these factors affect algal assemblages singly, and in concert with each other. Regardless...
Resource Type:: Dissertation
Full Text:: low (50 and 15 pEm -2s-1 ) irradiances were characterized by higher biomass, a greater amount of

ScholarsArchive@OSU

Biological control of crown gall with bacterial and fungal antagonists

Interactions between fire and dwarf mistletoe in ponderosa pine

The disease cycle of side rot of pear, caused by Phialophora malorum

The nature of Fusarium exclusion from coniferous forest soils : evidence of differential microbial involvement in forest vs. nursery soils

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

Distributional patterns and taxonomic structure of diatom assemblages in Netarts Bay, Oregon

Production dynamics of a Zostera marina L. bed in Netarts Bay, Oregon

Production dynamics of sediment-associated algae in two Oregon estuaries

Ozone flux in Helianthus annuus (L.)

Effects of current velocity, irradiance, and herbivory on algal assemblages in laboratory streams

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