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Studies on viruses isolated from roses with rose mosaic symptoms

Creator:: Watson, Thomas Ray
Abstract:: Previous work on the rose mosaic virus has produced uncertainty concerning the identity and properties of this virus. This work was undertaken to help establish the true identity of the virus and to determine some of its properties. A mechanically transmissible virus associated with rose mosaic virus disease of Rosa...
Resource Type:: Masters Thesis
Full Text:: . Hallìwell, Robert S. Isolation, purification, serology and nature of rose mosaic virus. Ph. D. thesis

Effects of volatile fungicides on Sphaerotheca pannosa on rose

Creator:: Gallian, John J.
Resource Type:: Dissertation
Full Text:: PANNOSA ON ROSE Redacted for privacy Abstract approved: ( Duane Coyier Sphaerotheca pannosa var. rosae

Relation of nitrogenous substances in rose leaves to powdery mildew resistance

Creator:: Bartlett, Allan B.
Abstract:: There is considerable variation among rose varieties in susceptibility to mildew, and as a result of maturation, leaves of most susceptible varieties become resistant to infection. The nature of resistance has been sought in various studies involving environmental, morphological, and physiological factors. An attempt was made in the present investigation...
Resource Type:: Dissertation
Full Text:: of rose in North America. Blumer (2) listed both S. pannosa and S. macularis (Wallr. ex Fr.) W.B

Recommendations for Control of Tall Oatgrass, Poison Oak, and Rose in Willamette Valley Upland Prairies

Creator:: Wilson, Mark V. and Clark, Deborah Louise, 1950-
Abstract:: Native upland prairies, which once dominated the landscape of the Willamette Valley, are considered among the rarest of Oregon's ecosystems. Even though only remnants remain today, they harbor many rare and endangered species such as the Fender's blue butterfly and its host plant, Kincaid’s lupine. Invasion of remnant prairies by...
Resource Type:: Technical Report
Full Text:: Rose in Willamette Valley Upland Prairies Prepared by Mark V. Wilson and Deborah L. Clark

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Creator:: Bender, Carol Lavane
Abstract:: Studies were conducted on pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae, causal agent of rose powdery mildew. Methods were developed for isolation and identification of Sphaerotheca pannosa var. rosae races on rose. Monoconidial isolates were initiated on detached leaves, increased on host plants, and inoculated to rose cultivars...
Resource Type:: Masters Thesis
Full Text:: susceptibility of detached rose leaves to S. pannosa var. rosae isolates of unknown and known virulence was

Effects of the insecticide dieldrin on benthic algae in laboratory streams

Creator:: Rose, Frederick Louis
Abstract:: The accumulation of dieldrin and its effects on species composition of benthic algal communities were studied in laboratory streams. Effects of dieldrin on photosynthetic and respiratory rates of the blue-green alga Phormidium retzii were determined using a Gilson Differential Respirometer. Dieldrin concentrations ranging from 0.05 to 7.0 ppb were maintained...
Resource Type:: Dissertation
Full Text:: is presented c,,x\"c vel S) lC Typed by Donna Olson for Frederick Louis Rose Jr

An investigation of cherry gummosis

Creator:: Griffin, F. L. (Frederick Llewellyn)
Resource Type:: Masters Thesis
Full Text:: "S and Physiology. BacteriaJ Biology/ Life History. (ParisitologyrRule of Proof. E. CONTROL* • V 1

Patterns in coastal marsh vegetation of the Juneau area, Alaska

Creator:: Stone, Catherine S.
Abstract:: A vegetation study was made of four coastal marshes near Juneau, Alaska. Results confirmed earlier studies' findings in southeast Alaska that communities or assemblages of species can be identified but from marsh to marsh these assemblages appear to have no consistent relationship to each other or to environmental "factors" such...
Resource Type:: Dissertation
Full Text:: , Alaska AN ABSTRACT OF THE THESIS OF Catherine S. Stone for the degree of Doctor of Philosophy in the

Population viability analysis of endangered plant species : an evaluation of stochastic methods and an application to a rare prairie plant

Creator:: Kaye, Thomas N.
Abstract:: Transition matrix models are one of the most widely used tools for assessing population viability. The technique allows inclusion of environmental variability, thereby permitting estimation of probabilistic events, such as extinction. However, few studies use the technique to compare the effects of management treatments on population viability, and fewer still...
Resource Type:: Dissertation
Full Text:: Rare Prairie Plant. Abstract Abstract approved: David A Patricia S. Muir Transition matrix models

Studies of yellow rust of Rubus

Creator:: Lund, Walter Thomas
Resource Type:: Masters Thesis
Full Text:: appreciation to Doctor S. M. Zeller for his suggestions and willing assistance during the inves- tigation

ScholarsArchive@OSU

Studies on viruses isolated from roses with rose mosaic symptoms

Effects of volatile fungicides on Sphaerotheca pannosa on rose

Relation of nitrogenous substances in rose leaves to powdery mildew resistance

Recommendations for Control of Tall Oatgrass, Poison Oak, and Rose in Willamette Valley Upland Prairies

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Effects of the insecticide dieldrin on benthic algae in laboratory streams

An investigation of cherry gummosis

Patterns in coastal marsh vegetation of the Juneau area, Alaska

Population viability analysis of endangered plant species : an evaluation of stochastic methods and an application to a rare prairie plant

Studies of yellow rust of Rubus

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