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Creator:: Lund, Walter Thomas
Resource Type:: Masters Thesis
Full Text:: and Distribution of the Disease ............. i Purpose of the Investigation

Creator:: Vaughan, Edward Kemp
Resource Type:: Masters Thesis
Full Text:: . Geographic Distribution and Econoric Importance 5 III. Symptomz of Crinkle IV. Nature of the Disease

Creator:: Kohnen, Paul D.
Abstract:: Biological, serological, and molecular characteristics of the P4 pathotype of pea seedborne mosaic potyvirus (PSbMV) were investigated. The characterization allowed P4 to be differentiated from other pathotypes of the same virus. P4 was distinguished from P1 on the basis of host symptomatology. It induced varied, but often distinctive symptoms in...
Resource Type:: Dissertation
Full Text:: of Pea Seedborne Mosaic V Abstract approved: Richar 0. Hafipton Biological, serological, and

Creator:: Intrama, Siriphong
Abstract:: An isolate of Coniothyrium obtained from a stem canker on Nocturne rose from the Botany Department Farm, Corvallis, Oregon was studied with respect to morphological and cultural characters, pathogenicity and mineral nutrition. The hyphae of the isolate were smooth, septate and branched. The hyphal cells averaged 16.37 X 3.52 microns....
Resource Type:: Dissertation

Creator:: Ostrowski, Richard Carl
Abstract:: Since 1948, pear decline has been responsible for the devitalization and death of many pear trees in the Pacific Coast states and British Columbia. Use of anatomical abnormalities of the graft union as a diagnostic technique to separate pear decline from other disorders exhibiting similar symptoms was evaluated. Modifications in...
Resource Type:: Dissertation

Creator:: Hunger, Robert Marvin
Resource Type:: Dissertation
Full Text:: the disease and increased yields significantly. Treatment with M 9834 at 0.3 gm/plant resulted in

Creator:: Whitaker, William Carey
Resource Type:: Masters Thesis
Full Text:: disease investigators and the commercial growers. The Oregon Station and. the United. States Bureau of

Creator:: Murray, Marion S.
Abstract:: In 1991 Pacific yew (Taxus brevifolia Nutt.) was reported as a new host for Phytophthora lateralis Tucker and Milbrath which is an aggressive root rot pathogen thought previously to be specific to Port-Orford-cedar. This study was designed to compare the pathogenicity of P. lateralis on the two hosts, and to...
Resource Type:: Masters Thesis
Full Text:: Phytophthora lateralis-killed Port-Orford-cedar and Pacific yew trees and seedlings. 4. Means of disease

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