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Dinitroaniline-herbicide resistance in goosegrass (Eleusine indica) : ecophysiological aspects

Creator:: Valverde, Bernal E.
Abstract:: Growth of individual goosegrass (Eleusine indica (L) Gaertn.) plants of three dinitroaniline-herbicide resistant (R) and three susceptible (S) biotypes from North Carolina, South Carolina, and Mississippi was analyzed in greenhouse experiments. Leaf area and biomass measurements, including root, shoot, above-ground, and total dry weights were similar among the biotypes studied....
Resource Type:: Dissertation
Full Text:: (Eleusine indica) : ecophysiological aspects AN ABSTRACT OF THE THESIS OF Bernal E. Valverde for the

Performance of perennial ryegrass (Lolium perenne L.) seed crops under water stress conditions

Creator:: Velloza, Theodosius Marmaduke
Abstract:: Summer drought is a major factor limiting the regrowth of perennial ryegrass seed crops. This phase of crop development has a strong influence on seed yield because most of the tillers that contribute towards next season's seed crop are produced or regrown during this period. In recent years many seed...
Resource Type:: Dissertation
Full Text:: . Richardson, Daniel B. Dunham, Murray L. Laver and Mr. Mark E. Mellbye for their constructive criticisms. I

Factors affecting selective weedy rye (Secale sp.) control in winter wheat with the herbicide ethiazin

Creator:: Diener, Phillip R.
Abstract:: Weedy rye (Secale spp.) is a weed in the winter-wheat- growing regions in the Pacific Northwest and surrounding regions. Ethiazin (4-amino-6-(1,1-dimethylethyl)-3- (ehtylthio)-1,2,4-triazine-5 (4H)-one) has shown selective control of weedy rye in the cultivar 'Stephens', (Triticum aestivum). Field, greenhouse, and outdoor pot experiments were conducted to determine factors influencing selectivity. Field...
Resource Type:: Masters Thesis
Full Text:: October 23, 1987 Typed by Phil Diener and Jeannette Emry ACKNOWLEDGEMENT I would like to recognize

The effects of paclobutrazol and uniconazol on red clover seed production

Creator:: Silberstein, Thomas B.
Abstract:: Excessive growth by red clover, Trifolium pratense L., grown for seed interferes with maximum seed production and harvest in Oregon's Willamette Valley. This study was conducted during 1986 and 1987 on red clover cv. Kenland to determine if plant height and dry matter production could be inhibited and seed yields...
Resource Type:: Masters Thesis
Full Text:: to Jeannette Harper for her help during crunch times (especially in my absence) in typing and

ALS-inhibitor resistant downy brome (Bromus tectorum L.) biotypes in Oregon : Mechanism of resistance, fitness, and competition

Creator:: Park, Kee-Woong
Abstract:: Understanding the mechanism of resistance, relative fitness and competitiveness of herbicide resistant biotypes is important to predict population dynamics and to establish resistance management strategies. This study was conducted to determine the level of resistance to acetolactate synthase (ALS) inhibitors and the mechanism of resistance of ALS-inhibitor resistant downy brome...
Resource Type:: Dissertation
Full Text:: , Chuck Cole, Carol Garbacik, and Jeannette Harper who contributed to the success of this work are

The effect of residue removal and burning on the growth of Festuca longifolia Thuill. and Festuca rubra L. subsp. commutata Gaud. established for seed production

Creator:: Vollmer, Gregory S.
Abstract:: Hard Fescue (Festuca longifolia Thuill.) has potential for in creased turf use but does not respond well to normal seed production management practices in Oregon. Field burning (the normal residue management practice) results in reduced seed yields in commercial hard fescue seed production fields but stimulates seed production in Chewings...
Resource Type:: Masters Thesis
Full Text:: time and facilities needed for the completion of this work. Beverly Clark, Sandy Smith and Jeannette

Crop rotation effects on the seed bank and population dynamics of annual bluegrass (Poa annua)

Creator:: Sardar, Farid M.
Abstract:: Field studies were conducted to evaluate the effect of crop rotation on annual bluegrass plant population dynamics, seed rain, and seed bank in 1996 and 1997 at two sites. Growth-chamber studies were conducted to determine the influence of the mother plant environment on annual bluegrass germination. The change in population,...
Resource Type:: Masters Thesis
Full Text:: am grateful to Drs. Ralph E. Berry and David Pyke for serving on my graduate committee. Special

Biology of Bromus rigidus : interference in winter wheat, seed longevity in the soil, and vernalization requirements for flowering

Creator:: Gleichsner, Jean Ann
Resource Type:: Dissertation
Full Text:: always made time to help me. Many thanks to Jeannette Emry for her secretarial assistance. I thank the

Effects of lactofen herbicide on cellular uptake of glyphosate herbicide in malva parviflora L.

Creator:: Wells, Barbara Heard
Abstract:: Time-course growth chamber studies were conducted on little mallow (Malva parviflora L.) to determine whether sublethal doses of lactofen (1'-(carboethoxy)ethyl-5-[2-chloro-4-(trifluoromethyl) phenoxy]-2- nitrobenzoate) would enhance uptake of glyphosate (N'-(phosphonomethyl) glycine) by altering membrane permeability. Lactofen-induced membrane peroxidation was determined by harvesting leaf discs, measuring stress ethylene evolution, and recording increases in...
Resource Type:: Dissertation
Full Text:: friendship and advice. I would also like to thank Jeannette Emry for typing the appendix tables for this

Weed control with glyphosate and glufosinate in herbicide-resistant sugarbeets (Beta vulgaris L.).

Creator:: Guza, Corey J.
Abstract:: Field studies were conducted in 1998 and 1999, to evaluate glyphosate and glufosinate for control of redroot pigweed, common lambsquarters, hairy nightshade, and barnyardgrass in herbicide-resistant sugarbeets. Treatments that included two or three applications of glyphosate, regardless of rate, or glyphosate applied once in combination with BAS 656 07 H...
Resource Type:: Masters Thesis
Full Text:: assistance. A sincere thanks to Jan Jones, Jeannette Harper, and the Malheur Experiment Station faculty and

ScholarsArchive@OSU

Dinitroaniline-herbicide resistance in goosegrass (Eleusine indica) : ecophysiological aspects

Performance of perennial ryegrass (Lolium perenne L.) seed crops under water stress conditions

Factors affecting selective weedy rye (Secale sp.) control in winter wheat with the herbicide ethiazin

The effects of paclobutrazol and uniconazol on red clover seed production

ALS-inhibitor resistant downy brome (Bromus tectorum L.) biotypes in Oregon : Mechanism of resistance, fitness, and competition

The effect of residue removal and burning on the growth of Festuca longifolia Thuill. and Festuca rubra L. subsp. commutata Gaud. established for seed production

Crop rotation effects on the seed bank and population dynamics of annual bluegrass (Poa annua)

Biology of Bromus rigidus : interference in winter wheat, seed longevity in the soil, and vernalization requirements for flowering

Effects of lactofen herbicide on cellular uptake of glyphosate herbicide in malva parviflora L.

Weed control with glyphosate and glufosinate in herbicide-resistant sugarbeets (Beta vulgaris L.).

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