Index Catalog // ScholarsArchive@OSU

The vegetation dynamics of Pinus contorta forest, Crater Lake National Park, Oregon

Creator:: Zeigler, Robert S.
Abstract:: This study describes the soils, vegetation and age structure of the Pinus contorta forests of Crater Lake National Park. Growth rates of P. contorta, and levels of infection and impact of dwarf mistletoe (Arceuthobium americanu1r) on growth of P. contorta individuals are compared among communities. Vegetation description is based on...
Resource Type:: Masters Thesis

Therapeutic non-directive play with low achievers in reading

Creator:: Hoyser, Elizabeth Emily
Abstract:: The purpose of the study was to investigate the effectiveness of therapeutic non- directive play treatment with third grade boys who were low achievers in reading and to determine how treatment was associated with changes in reading achievement: vocabulary and comprehension; reading attitude and academic self-concept; role expectations and self-adequacy....
Resource Type:: Dissertation
Full Text:: approved: Redacted for Privacy Dr. Anna R. Meeks The purpose of the study was to investigate the

Chemical applications for control of armillaria root rot of Ponderosa pine

Creator:: Filip, Gregory M.
Abstract:: Root rot caused by Armillariella mellea creates roughly circular disease centers of infected dead and dying trees in the younggrowth ponderosa pine forest under study. Research objectives concerning chemical control of the disease were: 1) to test the effectiveness of certain chemicals in protecting living pines adjacent to disease centers...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Gregory M. Filip for the degree

Epidemiology of Lophodermella morbida in plantations of ponderosa pine in western Oregon

Creator:: Harvey, George M.
Abstract:: In 1967, Lophodermella morbida Staley and Bynum, a recently described hypodermataceous needle-cast fungus, became destructively epidemic in a knobcone pine (Pinus attenuata Lemm.) plantation in Del Norte County, California, and in several ponderosa pine (P. ponderosa Laws.) plantations in western and southwestern Oregon. This thesis presents information on this currently...
Resource Type:: Dissertation
Full Text:: : Lewis F. Roth In 1967, Lophodermella morbida Staley and Bynum, a recently- described hypodermataceous

Distribution and variation of Armillariella mellea clones in relation to vegetative cover and severity of root rot in Ponderosa pine

Creator:: Cooley, Sally Joan
Abstract:: Root rot due to Armillariella mellea (Vahl. ex Fr.) Karst. is unusually severe in ponderosa pine near Glenwood, Washington. Isolate relations, clonal variability, vegetation patterns, and climate were examined in relation to severity of disease in this area. Ninety-one isolates from 70 infection centers were examined. Pairings of neighboring isolates...
Resource Type:: Masters Thesis
Full Text:: . Lewis F. Roth Root rot due to Armillariella mellea (Vahl. ex Fr.) Karst. is unusually severe in

Growth and sporulation of Phytophthora lateralis in vitro as influenced by the chemical and physical environment

Creator:: Englander, Larry
Abstract:: Phytophthora lateralis Tucker and Milbrath, causal agent of a serious fungus root rot of Chamaecyparis lawsoniana, has seriously damaged natural stands in southwestern Oregon forests and affected ornamentals throughout the Pacific Northwest. Progress with an effective control program in the field has been limited by lack of critical knowledge of...
Resource Type:: Dissertation
Full Text:: INFLUENCED BY THE CHEMICAL AND PHYSICAL ENVIRONMENT Abstract approved: Redacted for Privacy Lewis F. Roth

Epidemiological insights into Armillaria mellea root rot in a managed Ponderosa pine forest

Creator:: Shaw, Charles G. (Charles Gardner) 1948-
Abstract:: Root rot of ponderosa pine caused by Armillaria mellea was studied in a pine forest that had been under management for 30 years in Klickitat County, Washington. Information sources included disease survey, detailed observation and description of specific disease situations, and examination of roots in situ and removed. Roughly circular...
Resource Type:: Dissertation
Full Text:: MANAGED PONDEROSA PINE FOREST Abstract approved: Redacted for Privacy Lewis F. Roth Root rot of

The relation of cover to the distribution of Armillaria mellea in a Ponderosa pine forest

Creator:: Adams, David Howard
Abstract:: Numerous isolates of Armillaria mellea were obtained within a 250 by 450 foot Study Area in a ponderosa pine plantation in central Oregon. These isolates were recovered from roots of armillaria-killed young-growth pine, from large stumps of the former pine overstory, including roots away from the stump proper, and from...
Resource Type:: Dissertation
Full Text:: Abstract approved: Redacted for Privacy Lewis F. Roth Numerous isolates of Armillaria mellea were

Survival of Phytophthora lateralis in an organic matter fraction of the soil

Creator:: Ostrofsky, William Dow
Abstract:: Chamaecyparis lawsoniana, an extremely valuable timber tree species, is highly susceptible to a serious, soil -borne root disease caused by Phytophthora lateralis. Disease outbreaks of epidemic proportions are continually causing high mortality in natural stands of the host tree. Practical control measures rely on an understanding of the many factors...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy Lewis F. Roth Chamaecyparis lawsoniana, an extremely valuable timber tree species

Fungal and bacterial associations in heart rots of Abies concolor (Gord. and Glend.) Lindl. and techniques for estimating damage in southwestern Oregon

Creator:: Aho, Paul E.
Abstract:: Infection courts for microorganisms invading white fir heartwood were determined to be primarily branches and basal wounds. Of 11 hymenomycetes isolated from infected trees, only four: Echinodontiurn tinctorium, Phellinus chrysoloma, Pholiota adiposa, and Hericium abietis were of major significance in terms of frequency of infection and damage caused. Two or...
Resource Type:: Dissertation
Full Text:: express my gratitude to my major professor Lewis F. Roth for his guidance, suggestions and criticisms

ScholarsArchive@OSU

The vegetation dynamics of Pinus contorta forest, Crater Lake National Park, Oregon

Therapeutic non-directive play with low achievers in reading

Chemical applications for control of armillaria root rot of Ponderosa pine

Epidemiology of Lophodermella morbida in plantations of ponderosa pine in western Oregon

Distribution and variation of Armillariella mellea clones in relation to vegetative cover and severity of root rot in Ponderosa pine

Growth and sporulation of Phytophthora lateralis in vitro as influenced by the chemical and physical environment

Epidemiological insights into Armillaria mellea root rot in a managed Ponderosa pine forest

The relation of cover to the distribution of Armillaria mellea in a Ponderosa pine forest

Survival of Phytophthora lateralis in an organic matter fraction of the soil

Fungal and bacterial associations in heart rots of Abies concolor (Gord. and Glend.) Lindl. and techniques for estimating damage in southwestern Oregon

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