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Creator:: Hennon, Paul Edward
Abstract:: Alaska-cedar (Chamaecvparis nootkatensIs (D. Don) Spach) is a valuable tree that is suffering from a serious decline and mortality of unknown cause throughout southeast Alaska. Epidemiological and pathological studies were initiated to determine if a pathogen is the primary cause of this problem. By examining old aerial photographs and by...
Resource Type:: Dissertation
Full Text:: mortality of Chamaecyparis nootkatensis in southeast Alaska AN ABSTRACT OF THE THESIS OF Paul

Creator:: Hyman, Michael R., Ensign, Scott A., Arp, Daniel J., and Ludden, Paul W.
Abstract:: Carbonyl sulfide (COS) has been investigated as a rapid-equilibrium inhibitor of CO oxidation by the CO dehydrogenase purified from Rhodospirillum rubrum. The kinetic evidence suggests that the inhibition by COS is largely competitive versus CO (Ki = 2.3 pM) and uncompetitive versus methylviologen as electron acceptor (Ki = 15.8 pM)....
Resource Type:: Article
Full Text:: from RhodospiriZZum rubrum+ Michael R. Hyman,t Scott A. Ensign,s Daniel J. Arp,t and Paul W. Ludden*,s

Creator:: Cahill, James M.
Abstract:: A glaze storm of exceptional severity was seen in the Corvallis area, January, 1942. The weight of ice that accumulated in the crowns of young-growth Douglas-fir trees caused widespread top breakage in many stands lying in the broad path of this storm. Early research on this phenomenon showed the majority...
Resource Type:: Masters Thesis
Full Text:: top-broken, young-growth Douglas-fir trees ABSTRACT OF THE THESIS OF James Michael Cahill for the

Creator:: Goldfarb, Barry
Abstract:: To determine which isolates will most rapidly replace Phellinus weirii in stumps and roots, Trichoderma spp. were isolated from P. weirii-infested stumps and roots, identified, and examined for growth rates and lethal effects on P. weirii in vitro. Phellinus weirii-infested Douglas-fir stumps and stump roots were sampled for microorganisms by...
Resource Type:: Masters Thesis
Full Text:: Michael McWilliams provided invaluable technical assistance. Dale Snedaker assisted in locating study

Creator:: Angwin, Peter A.
Abstract:: Studies to identify the environmental factors that influence the rate of ectotrophic mycelial growth of Phellinus weirii (Murr.) Gilbertson along Douglas-fir roots were undertaken both in the laboratory and in the field. The effects of soil pH, nitrogen, moisture, temperature, microorganisms and bulk density were investigated. In the lab, the...
Resource Type:: Masters Thesis
Full Text:: forest pathology: Paul Hennon, Phil Hamm, John Kalafarski, Jeff Witcosky, Barry Goldfarb, and

Creator:: Ripley, James Douglas
Abstract:: In an effort to describe the plant communities and succession of the Oregon coastal grasslands, vegetation and environmental data were collected from 75 stands at 24 separate locations ranging from Cape Falcon in Tillamook County to Cape Ferrelo in Curry County. The vegetation data consisted of cover and frequency values...
Resource Type:: Dissertation

Creator:: Whitesides, Steven K.
Abstract:: Conditions were established for inducing pear blossom blast caused by Pseudomonas syringae (Ps) on both attached and detached shoots. The incidence of disease was proportional to the log of Ps population under optimal temperature, moisture and bloom developmental stage. Highest incidence of infection followed occurrence of a major exotherm in...
Resource Type:: Dissertation
Full Text:: Loper and Michael Kawalek who provided training assistance and Dr. Dennis Gross who provided bacterial

Creator:: Angwin, Peter A.
Abstract:: Phellinus weirii (Murr.) Gilbertson, cause of laminated root and butt rot, is a heterothallic basidiomycete lacking clamp connections. Two biological species groups of the fungus have been hypothesized, the Douglas-fir and cedar-types, on the basis of physiological, morphological and epidemiological differences. Single-spore and vegetative isolates differ in cultural morphology, nuclear...
Resource Type:: Dissertation
Full Text:: their advice and help through the years. Dr. Michael Larsen (USDA Forest Service, Center for Forest

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