Index Catalog // ScholarsArchive@OSU

Lodging control and yield enhancement in Morex spring barley with paclobutrazol treatment

Creator:: Morrison, Laura A.
Abstract:: Lodging in cereals can cause significant decreases in yield. It is both a problem in susceptible cereal cultivars with a tall-stemmed, weak-strawed growing habit and in lodging-resistant cereal cultivars when they are grown under high-nitrogen, high-moisture regimes. Plant growth regulators (PGR's) are chemical growth retardants that offer a method of...
Resource Type:: Masters Thesis
Full Text:: diseases. For example, Cercosperella (eyespot), a stem disease, can both cause lodging and show an

Yield loss assessment in nonprotected winter wheat varieties (Triticum aestivum, L. em Thell)

Creator:: Camacho Casas, Miguel Alfonso
Abstract:: The effects of some soil- and foliar-borne biotic factors on grain yield and the components of yield were evaluated using five winter wheat varieties sown at two dates. Within each planting date, varieties were grown under four different combinations of two soil treatments (fumigation and nonfumigation) and two foliar treatments...
Resource Type:: Masters Thesis
Full Text:: technique of yield determination; however, records must be kept on growth stages and disease severities at

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

Inheritance of resistance to common bunt races T-23 and L-16 and association of bunt resistance with selected agronomic characters in a hybrid of Hohenheimer x Stephens wheat

Creator:: Kanbertay, Mesut
Resource Type:: Masters Thesis
Full Text:: . Jour. Ag. Res. 23:445-479. 23. . 1925. The inheritance of disease reaction in wheat and oats

Effects of growth-regulating treatments on eradication of PVX and PVS in potato shoot-tip culture

Creator:: Gallardo-Ramirez, Mirian
Abstract:: Four experiments were conducted to evaluate the effects of growth-promoting treatments on potato sprouts and plantlets grown in vitro, and to determine the relationships between growth rate and eradication of PVX and PVS through shoot-tip culture. The approach consisted of exposing plant material to potential growth-regulating treatments, selecting the more...
Resource Type:: Masters Thesis
Full Text:: aseptically in vitro (Quak, 1972). Since then, the production and propagation of disease-free plants by

The inheritance of stem rust (Puccinia graminis graminicola) resistance in perennial ryegrass (Lolium perenne)

Creator:: Rose, Crystal A.
Abstract:: Three stem rust Puccinia graminis graminicola, resistant sources of perennial ryegrass, Lolium perenne, 4A, 48A, and 77A, were crossed in a partial diallel design with one susceptible source, MP-2, resulting in six crosses excluding reciprocals. The F1's and cloned parental populations were inoculated in the field and rated on a...
Resource Type:: Masters Thesis
Full Text:: there is an association of disease reaction and plant maturity; 2) to determine the nature of

Inheritance of resistance in some wheat introductions to selected races of bunt, Tilletia caries (DC) Tul and Tilletia foetida (Wallr) Liro

Creator:: Abdalla, Osman S.
Abstract:: Bunt or stinking smut is a major disease of wheat. In the U.S. common bunt, Tilletia caries (DC) Tul. and T. foetida (Wallr) Liro, is a threat to wheat production in the Pacific Northwest. Screening trials conducted by USDA Cereal Investigations Project in Oregon, from 1955-1980, revealed that a number...
Resource Type:: Dissertation
Full Text:: losses from this disease have led to the use of chemical seed treatments and resistant varieties. A

Response of downy brome (Bromus tectorum) and Kentucky bluegrass (Pao pratensis) to primisulfuron

Creator:: Hendrickson, Paul E.
Abstract:: Glasshouse and growth-chamber experiments were conducted to evaluate primisulfuron phytotoxicity and the influence of adjuvants on downy brome and Kentucky bluegrass. GR₅₀ (50% growth reduction) values were 0.97 ± 0.57 and 8.07 ± 1.85 g/ha for downy brome and Kentucky bluegrass, respectively. Primisulfuron was applied to downy brome and Kentucky...
Resource Type:: Masters Thesis
Full Text:: Response of downy brome (Bromus tectorum) and Kentucky

Effect of scald (Rhynchosporium secalis) on yield and yield components of twelve winter barley (Hordeum vulgare) genotypes

Creator:: Zencirci, Nusret
Abstract:: The effects of scald epidemics, induced by Rhynchosporium secalis (Oud.) Davis, on the yield and quality of winter malting barley have not been reported. The principal objective of this investigation was to assess yield and quality losses in resistant and susceptible winter barley genotypes in diverse environments of the Pacific...
Resource Type:: Masters Thesis
Full Text:: %. Resistant genotypes showed lower disease severities, and yield losses than susceptible genotypes. Natural

Assessment of resistance and inheritance to Barley Yellow Dwarf Virus disease (BYDV) in five wheat cultivars (Triticum aestivum L.)

Creator:: Tola, Jaime
Abstract:: Barley Yellow Dwarf Virus (BYDV) is a major disease of wheat. Unfortunately, unlike barley where the Yd2 gene provides adequate levels of resistance, the situation in wheat is more complex. This study was designed to provide information regarding: 1) evaluation of methods of measuring resistance among selected cultivars; 2) identification...
Resource Type:: Dissertation
Full Text:: : Assessment of Resistance and Inheritance to Barley Yellow Dwarf Virus Disease in Five Wheat Cultivars

ScholarsArchive@OSU

Lodging control and yield enhancement in Morex spring barley with paclobutrazol treatment

Yield loss assessment in nonprotected winter wheat varieties (Triticum aestivum, L. em Thell)

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

Inheritance of resistance to common bunt races T-23 and L-16 and association of bunt resistance with selected agronomic characters in a hybrid of Hohenheimer x Stephens wheat

Effects of growth-regulating treatments on eradication of PVX and PVS in potato shoot-tip culture

The inheritance of stem rust (Puccinia graminis graminicola) resistance in perennial ryegrass (Lolium perenne)

Inheritance of resistance in some wheat introductions to selected races of bunt, Tilletia caries (DC) Tul and Tilletia foetida (Wallr) Liro

Response of downy brome (Bromus tectorum) and Kentucky bluegrass (Pao pratensis) to primisulfuron

Effect of scald (Rhynchosporium secalis) on yield and yield components of twelve winter barley (Hordeum vulgare) genotypes

Assessment of resistance and inheritance to Barley Yellow Dwarf Virus disease (BYDV) in five wheat cultivars (Triticum aestivum L.)

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