Index Catalog // ScholarsArchive@OSU

The influence of light, temperature and humidity on the herbicidal activity of bromoxynil (3,5-dibromo-4-hydroxybenzo-nitrile) on Amsinckia intermedia

Creator:: Zimmerman, Martin (Martin Joseph)
Abstract:: The use of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) to control broadleaf weeds in cereal crops has become widespread. This herbicide has not always performed satisfactorily for reasons which were not clearly evident. The effects of temperature, light and humidity on the herbicidal activity of bromoxynil on coast fiddleneck, Amsinckia intermedia, were studied. Fiddleneck...
Resource Type:: Masters Thesis

The effect of 2,4-D on the respiration rate and ethylene production of Bartlett pears and Red Delicious apples

Creator:: Fechtig, Allen David
Abstract:: After nearly 20 years of commercial use in orchards without apparent tree injury in Oregon and Washington, 2,4-D [(2,4-dichlorophenoxy) acetic acid] was reported in 1970 to cause injury to apple and pear trees in Washington. In the early 1970's, there was widespread concern among growers, researchers, and processors in the...
Resource Type:: Dissertation

Apoplastic distribution of atrazine and glyphosate in intact sunflower leaves

Creator:: Jachetta, John Joseph
Abstract:: Apoplastic distribution patterns of atrazine [2-chloro-4-(ethylamino)- 6-(isopropylamino)-s-triazine], glyphosate [N-(phosphonomethyl)- glycine], the naturally occurring apoplastic leaf solutes, and the apoplastic dye PTS (trisodium 3-hydroxy-5,8,10-pyrenetrisulfonate) were compared. Aliquots of sap were expressed from intact sunflower leaves in a pressure chamber over intervals of 0.2 to 0.4 bars. Three distinct fractions were detected...
Resource Type:: Dissertation

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

Sethoxydim herbicide in red fescue and bentgrass : levels and mechanisms of selectivity

Creator:: Butler, J. Hugh B.
Abstract:: The herbicide rate required to reduce growth by 50% (GR₅₀) of 11 cultivars of red fesue (Festuca rubra L. and F. rubra ssp. commutata) and for four cultivars of bentgrass (Agrostis tenuis Sibth. and A. stolonifera L. var. palustris) to sethoxydim (2-[1-(ethoxyimino) butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one) was determined in greenhouse and laboratory experiments....
Resource Type:: Dissertation

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

Non-herbicidal effects of dinoseb on winter wheat yields

Creator:: Valverde, Bernal E.
Abstract:: A series of experiments were conducted from 1983 to 1985 to determine the effects of dinoseb [2-(1-methylpropyl)-4,6-dinitrophenol] on winter wheat (Triticum aestivum L. em Thell) yields. Field trials on dinoseb timing and dinoseb plus supplemental pesticides were established in an effort to elucidate the possible factors involved in the yield...
Resource Type:: Masters Thesis

Nitrogen timing and placement effects on grain and plant nitrogen, and grain yield in hard red winter wheat

Creator:: Bohle, Mylen G.
Abstract:: Hard red winter wheat has the potential to be an alternative crop in the Pacific Northwest, however percent grain nitrogen has been unacceptably low and grain yields have been about only 80% of soft white winter wheat. During the late spring and the summer months there is usually little rainfall,...
Resource Type:: Masters Thesis

The development of a model for computer simulation of a counseling center

Creator:: Anderson, Edwin LeRoy
Abstract:: The study resulted from a desire and interest to include computer simulation techniques in the design of educational practices. The purposes of the study were (1) to develop a computer model which would simulate the service functions of a counseling center by tracing students through the center and (2) to...
Resource Type:: Dissertation

Techniques for studying the effects of various cropping systems on the germination of buried weed seeds

Creator:: Thorsen, Jack Arlen
Abstract:: The study of the effects of cropping systems on buried weed seed is very costly. Most of the experiments of this nature were conducted prior to the introduction of herbicides. New techniques, material and methods are needed and could result in more research in this area of study. A polyester...
Resource Type:: Dissertation

ScholarsArchive@OSU

The influence of light, temperature and humidity on the herbicidal activity of bromoxynil (3,5-dibromo-4-hydroxybenzo-nitrile) on Amsinckia intermedia

The effect of 2,4-D on the respiration rate and ethylene production of Bartlett pears and Red Delicious apples

Apoplastic distribution of atrazine and glyphosate in intact sunflower leaves

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

Sethoxydim herbicide in red fescue and bentgrass : levels and mechanisms of selectivity

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

Non-herbicidal effects of dinoseb on winter wheat yields

Nitrogen timing and placement effects on grain and plant nitrogen, and grain yield in hard red winter wheat

The development of a model for computer simulation of a counseling center

Techniques for studying the effects of various cropping systems on the germination of buried weed seeds

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