Index Catalog // ScholarsArchive@OSU

Time effect of wild oat removal on winter wheat yield

Creator:: Abu-Irmaileh, Barakat Eid Ahmad
Abstract:: The extent of the competitive effect of wild oats on winter wheat yield was estimated in field studies on three commercial wheat farms in the Willamette Valley. The morphological development of the wild oat plants was also documented. Wild oats were removed from stands of wheat in six different treatments;...
Resource Type:: Masters Thesis
Full Text:: three different growth stages, treatment with barban, continuous hand weeding, and barban plus

The influence of environment and pathogen variability on the infection of wheat by Puccinia striiformis West

Creator:: Beaver, Richard Gary, 1939-
Abstract:: Race identification of stripe rust (Puccinia striiformis West. ) is influenced by environment, pathogen variability and host age. Isolates of stripe rust were collected in the Pacific Northwest and characterized on two sets of differential varieties; the "Oregon" and the United States. Six of the seven isolates tested on the...
Resource Type:: Dissertation
Full Text:: . 49 10 Disease gradients in late summer inoculated wheat plots, 1969. 50 11 Disease gradients and

Factors affecting selective control of wild oat and downy brome in wheat by trifluralin

Creator:: Aldridge, Jack Clifton
Abstract:: Trifluralin (a, a, a - trifluoro -2, 6 -dinitro-N, N-dipropyl-ptoluidine) is effective in controlling downy brome (Bromus tectorum L.) and wild oat (Avena fatua L.) but does not severely affect the growth of wheat (Triticum aestivum L.). Studies were conducted using germination chamber and greenhouse facilities to investigate possible factors...
Resource Type:: Masters Thesis
Full Text:: Factors affecting selective control of wild oat and

Initiation and spread of footrot of wheat caused by Cercosporella herpotrichoides

Creator:: Rowe, Randall Charles
Abstract:: Footrot of wheat (Cercosporella herpotrichoides Fron) is a major disease of winter wheat in certain areas of the world having a cool, damp winter and early spring climate. In Oregon, it is an economic problem in the higher rainfall wheat-growing areas in the eastern portion of the state. This study...
Resource Type:: Dissertation
Full Text:: , initiation of infection and epidemic development of this disease. The activity of the fungus is strongly

Suppression of take-all [Gaeumannomyces graminis (Sacc.) Arx & Olivier var. tritici Walker] of wheat (Triticum aestivum L.) by banded ammonium and chloride fertilizers

Creator:: Halsey, Mark Evan
Resource Type:: Dissertation
Full Text:: depends on soil nitrification rates and the timing of N application to avoid increased disease severity

Recognizing and controlling Cephalosporium stripe, a disease of cereal grains

Creator:: Oregon State University. Extension Service, Karow, Russell S., Powelson, R. L., and Koepsell, Paul A.
Abstract:: Published November 1985. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: Cephalosporium Stripe R.S. Karow, R.L. Powelson, and P.A. Koepsell Cephalosporium stripe is a soilborne disease

Studies on the organic acid metabolism of wheat smut fungus (Tilletia contraversa)

Creator:: Vaisey, Edgar Byron
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGflENT The author is greatly indebted to Dr. Vernon H. Cheldelin and especially to Dr. R. 4. Newburgh

Etiological studies on foot rot of wheat caused by Cercosporella herpotrichoides Fron.

Creator:: Byther, Ralph S.
Abstract:: Abundant conidial production occurs from colonized straws and plants infected with Cercosporella herpotrichoides Fron during the cool moist months of the growing season. Experiments were designed to study the survival, inoculum potential and competitive saprophytic ability of conidia in soil. Laboratory results indicated that cool moist soil favors the saprophytic...
Resource Type:: Dissertation
Full Text:: penetration and infection of a coleoptile or leaf sheath did not insure disease development. The infected

Aluminum toxicity in wheat (Triticum aestivum Vill., host)

Creator:: Kerridge, Peter Campbell
Abstract:: Wheat varieties of differential tolerance to Al were used in a series of nutrient solution experiments to study the inhibitory effects of Al on growth and nutrient uptake. The pH and the Al and P concentrations were rigorously maintained to prevent the confounding effects of Al and P precipitation and...
Resource Type:: Dissertation
Full Text:: growth and nutrient uptake. The pH and the Al and P con- centrations were rigorously maintained to

An evaluation of field methods of disease assessment in wheat (Triticum aestivum) for stripe rust (Puccinia striiformis)

Creator:: Mork, Colleen C.
Abstract:: The need to identify a simple but accurate method of stripe rust assessment that best predicts host response prompted this investigation. The study was divided into two plot types, one protected with the fungicide Bayleton and the other unprotected. Ten winter wheat cultivars were used and evaluated. Grain yield, test...
Resource Type:: Masters Thesis
Full Text:: % and 50-100%) were the four critical points chosen because of their placement along the disease

ScholarsArchive@OSU

Time effect of wild oat removal on winter wheat yield

The influence of environment and pathogen variability on the infection of wheat by Puccinia striiformis West

Factors affecting selective control of wild oat and downy brome in wheat by trifluralin

Initiation and spread of footrot of wheat caused by Cercosporella herpotrichoides

Suppression of take-all [Gaeumannomyces graminis (Sacc.) Arx & Olivier var. tritici Walker] of wheat (Triticum aestivum L.) by banded ammonium and chloride fertilizers

Recognizing and controlling Cephalosporium stripe, a disease of cereal grains

Studies on the organic acid metabolism of wheat smut fungus (Tilletia contraversa)

Etiological studies on foot rot of wheat caused by Cercosporella herpotrichoides Fron.

Aluminum toxicity in wheat (Triticum aestivum Vill., host)

An evaluation of field methods of disease assessment in wheat (Triticum aestivum) for stripe rust (Puccinia striiformis)

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