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Filtering by: Committee Member Christensen, B. E. Academic Affiliation Botany and Plant Pathology

Phytophthora species and riparian alder tree damage in western Oregon

Creator:

Sims, Laura L.

Abstract:

The genus Phytophthora contains some of the most destructive pathogens of forest trees, including the most destructive pathogen of alder in recent times, Phytophthora alni. Alder trees were reported to be suffering from canopy dieback in riparian ecosystems in western Oregon, which prompted a survey of alder health and monitoring...

Resource Type:

Dissertation

Full Text:

...........................................................................44 3.1 Phytophthora species composition from (a) stream water and (b) the rhizosphere associated
Interrelationship of wheat cultivar mixtures, stripe rust and yield

Creator:

Akanda, Shamsul I.

Resource Type:

Dissertation

Full Text:

special note of thanks goes to my committee members Kenneth B. Johnson, Mary L. Powelson, Warren E
Role of inoculum sources of Botrytis cinerea in the epidemiology of gray mold of snap beans

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:

my commitee members, Drs. C. E. Horner, N. W. Christensen, and R. G. Petersen for critically