Index Catalog // ScholarsArchive@OSU

Creator:: Sugar, David
Abstract:: Potential sources of inoculum of Phialophora malorum were investigated. P. malorum was found to be a soil-borne fungus whose role as a postharvest pathogen of pear is dependent upon passive dispersal with infested soil. P. malorum survived in soil under a wide range of conditions, with greatest survival in cool,...
Resource Type:: Dissertation
Full Text:: Botany and Plant Pathology presented on December 1, 1989. Title: The Disease Cycle of Side Rot of Pear

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:: . Ps is a bacterium that causes a disease of pear and many other hosts. It can be isolated readily

Creator:: Kirkland, Marjorie Lynn
Abstract:: The primary cause of "early dying" disease of potatoes in Oregon is Verticillium dahliae; however, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora (Ecc) and E. carotovora subsp. atroseptica (Eca) are also commonly isolated from diseased plants. Therefore, field and greenhouse studies were initiated to determine the relative involvement of each pathogen,...
Resource Type:: Masters Thesis
Full Text:: Basin of Oregon that exhibited typical "early dying" disease symptoms in 1981. 10 Foliar chlorosis and

Creator:: Gashaira, Bashir
Resource Type:: Dissertation
Full Text:: materially reduces the yield by causing blossom blight and fruit rot of stone fruit trees in western Oregon

Creator:: Johnson, Kenneth Bjorn
Abstract:: Spore dispersal gradients and pod disease gradients from point inoculum sources of Botrytis cinerea were measured over time in two snap bean field experiments. Laboratory grown inoculum was placed at ground level in a 30 x 30 cm square at bloom initiation and removed at full bloom. Dispersal of inoculum,...
Resource Type:: Masters Thesis
Full Text:: for Privacy_ U Mary L. Powelson Spore dispersal gradients and pod disease gradients from point

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: fields from eastern and western Oregon. The best predictor of end-of-season disease severity from data

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