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Escape in Time: Phenology Mitigates Impacts of the Introduced Cinnabar Moth, Tyria jacobaeae, on Native Herb Senecio triangularis in Western Oregon

Creator:: Lunde, A. Katarina
Abstract:: Classic biological control can be a powerful option for those tasked with managing biological invasions; however, some biocontrol releases lead to non-target attack – feeding, damage or development on species other than the target species. The cinnabar moth, Tyria jacobaeae L. (Lepidoptera: Erebidae) was introduced to Western Oregon as a...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Peter B. McEvoy

The sequestrate relatives of Russula in Australia and New Zealand

Creator:: Lebel, Teresa
Resource Type:: Dissertation
Full Text:: Australia and New Zealand. Abstract approved: James M. Trappe The sequestrate ectomycorrhizal fungi of

Potential susceptibility of tanoak associated and rare ericaceous plant species of southwestern Oregon to Phytophthora ramorum

Creator:: Zanzot, James W.
Abstract:: The sudden oak death pathogen, Phytophthora ramorum, is present in southwestern Oregon, and while an eradication effort is underway, the potential impact of the polyphagous pathogen on surrounding vegetation is unknown. Plant communities in the area are substantially different from those affected in California, although tanoak (Lithocarpus densiflorus), evergreen huckleberry...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF James W. Zanzot for the degree of

In vitro culture and growth modeling of Tuber spp. and inoculation of hardwoods with T. melanosporum ascospores

Creator:: Michaels, Thomas Joseph
Abstract:: In vitro growth of twelve isolates of Tither spp., the true truffles, was quantified by an agar-melt procedure. All isolates grew poorly on media commonly used for the culture of mycorrhizal fungi, but responded markedly to the addition of nitrate, as well as other inorganic ions, to malt and potato-dextrose...
Resource Type:: Dissertation

Assessment of potato tuber blight caused by Phytophthora infestans

Creator:: Glass, Jenny Rebecca
Abstract:: Late blight, caused by Phytophthora infestans, is a devastating problem to potato production in many parts of the world. While the foliar phases of this disease are well characterized, tuber infection, leading to quality losses and disease perpetuation, is less well understood. Experiments were conducted during 1998 and 1999 in...
Resource Type:: Masters Thesis
Full Text:: Redacted for privacy Redacted for privacy ACKNOWLEDGMENTS I thank Kenneth B. Johnson, Teresa Sawyer

Vegetation and fire history of a Ponderosa pine-white fir forest in Crater Lake National Park

Creator:: McNeil, Robert Curlan
Resource Type:: Masters Thesis
Full Text:: approved: B, Zobel This thesis describes the composition of and some of the environmental controls of the

Nitrogen fixation by Purshia tridentata : some ecological aspects and root nodule anatomy

Creator:: Dalton, David Andrews
Abstract:: This study examines several aspects of nitrogen fixation by Purshia tridentata (Pursh) D. C., a rosaceous shrub widespread in the central Oregon pumice region, especially as an understory species in Pinus ponderosa and Pinus contorta forests. Anatomical studies of root nodules under the light microscope revealed strong similarities to other...
Resource Type:: Masters Thesis
Full Text:: wish to express my sincere gratitude to Dr. Donald B. Zobel for his guidance and helpful assistance

Growth and reproductive ecology of Larix laricina in interior Alaska

Creator:: Brown, Kevin R.
Abstract:: Larix laricina in Alaska occurs on sites ranging from productive slopes and riverbottoms to wet bogs underlain by permafrost. It is largest on sites without permafrost, where it is associated with Picea glauca, but is much more common in bogs, where it occurs with Picea mariana. In this study, I...
Resource Type:: Masters Thesis
Full Text:: 54 9. Overwintering needles on Larix laricina seedlings in a) late September 1980 and b) May 1981 56

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Creator:: Rivedal, Hannah M.
Abstract:: Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley for edible seed, frozen foods, and fresh markets is susceptible to an undiagnosed soilborne disease. Diseased squash fields exhibit symptoms of stunting, root and crown rot, vascular discoloration, and late-season wilt, which in extreme cases can lead to total crop failure....
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ Kenneth B. Johnson Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley

Mycorrhizal fungi and their relationship to plant succession in subalpine habitats

Creator:: Cazares, Efren
Resource Type:: Dissertation
Full Text:: RELATIONSHIP TO PLANT SUCCESSION IN SUBALPINE HABITATS Abstract approved: Dr. James M. Trappe These studies

ScholarsArchive@OSU

Escape in Time: Phenology Mitigates Impacts of the Introduced Cinnabar Moth, Tyria jacobaeae, on Native Herb Senecio triangularis in Western Oregon

The sequestrate relatives of Russula in Australia and New Zealand

Potential susceptibility of tanoak associated and rare ericaceous plant species of southwestern Oregon to Phytophthora ramorum

In vitro culture and growth modeling of Tuber spp. and inoculation of hardwoods with T. melanosporum ascospores

Assessment of potato tuber blight caused by Phytophthora infestans

Vegetation and fire history of a Ponderosa pine-white fir forest in Crater Lake National Park

Nitrogen fixation by Purshia tridentata : some ecological aspects and root nodule anatomy

Growth and reproductive ecology of Larix laricina in interior Alaska

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Mycorrhizal fungi and their relationship to plant succession in subalpine habitats

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