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  • 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
    Full Text:
    -molar concentration of xylene and surfactant used as a solvent for the technical grade sethoxydim was

  • Interaction of cycloate with postemergence herbicides on sugarbeets and weeds

    Creator:
    Olson, Phillip David Leroy
    Resource Type:
    Masters Thesis
    Full Text:
    losing its herbicidal potential. The formulations of 1 Ro-Neet Herbicide Technical Bulletin. Stauffer

  • The influence of magnesium on the toxicity of atrazine

    Creator:
    Brenchley, Ronald Glenn
    Abstract:
    Atrazine is an asymmetrical s-triazine herbicide used pre- and post emergence for weed control in many crops. Triazine herbicides have been used in the Pacific-Northwest for weed control in orchard crops. Under certain conditions where trees were grown in nutrient deficient areas, it was noted that toxic symptoms due to...
    Resource Type:
    Masters Thesis
    Full Text:
    properties of atrazine are sum- marized in a technical bulletin from Geigy Chemical Corporation (20). The

  • Influence of soil moisture on movement of terbacil in soil

    Creator:
    Vesecky, John Francis
    Abstract:
    Previous field research with terbacil (3-tert-butyl-5-chloro- 6-methyluracil) has shown that early fall applications to dry soil performed better than did late fall or early winter applications to wet soil. Field and greenhouse studies were conducted to determine the effect of soil moisture content at time of application and the effect...
    Resource Type:
    Masters Thesis
    Full Text:
    The Technical Data Sheet of E. I. duPont, deNemours and Company (1967) stated that the pure chemical

  • The persistence of five herbicides in Hawaiian soil

    Creator:
    Kitagawa, Yukio
    Abstract:
    The persistence of DCPA, trifluralin, diphenamid, diuron, and prometryne was studied in three soils which were located at the Kula, Poamoho, and Waimanalo Experiment Stations. The order of decreasing persistency was diuron, prometryne, trifluralin, DCPA, and diphenamid. Diuron and prometryne activities were recorded for at least six months and diuron...
    Resource Type:
    Masters Thesis
    Full Text:
    with each increase in organic matter content 81 days after treatment. Schweizer and Holstun (46

  • Foliar vs. root uptake of the herbicide Hoe 23408 in Italian ryegrass and wild oats

    Creator:
    West, Geralyn Marie
    Abstract:
    HOE 23408 [methyl 2-[ 4-( 2, 4- dichlorophenoxy )phenoxy]propanoate] is a herbicide used to selectively-control Italian ryegrass (Lolium muitiflorum Lam.) and wild oats (Avena fatua L.) in wheat. The objective of this research was to compare the relative importance of foliar and root uptake of the herbicide in these two...
    Resource Type:
    Masters Thesis
    Full Text:
    and no injury symp- toms are present (American Hbechst Technical Information Bulletin). Following

  • Herbicidal effectiveness of trifluralin as influenced by methods of incorporation into the soil and depth of weed seed germination

    Creator:
    Gargano, Don Richard
    Abstract:
    This study was conducted to compare the effectiveness of four methods of incorporating the herbicide trifluralin into the soil, and to determine the interaction between depth of incorporation of trifluralin and depth of weed seed germination. Field experiments on green and dry peas were established in Oregon and Idaho. Trifluralin,...
    Resource Type:
    Masters Thesis
    Full Text:
    and chemical properties are summarized in a technical bulletin from Eli Lilly and Company (19). Pure

  • The response of tomatoes to atrazine as affected by magnesium and photoperiod

    Creator:
    Brenchley, Ronald Glenn
    Abstract:
    Studies were conducted to determine the nature of the interaction between atrazine (2-chloro-4-ethylamino-6-isopropylaminos- triazine) and magnesium on tomatoes. This interaction was studied under two light regimes: continuous light and a 12-hour photoperiod. Tomato plants were grown in sand cultures at three levels of magnesium fertilization. Four weeks after planting, atrazine...
    Resource Type:
    Dissertation
    Full Text:
    and chemical properties of atrazine are sum- marized in a technical bulletin from Geigy Chemical

  • The reproduction and mode of spread of sago pondweed (Potamogeton pectinatus L.) in irrigation system

    Creator:
    Ogg, Alex G.
    Abstract:
    Nine experiments were conducted during 1964 and 1965 to study the methods of reproduction and mode of spread of sago pondweed (Potamogeton pectinatus) in irrigation systems. Frequent treatments of sago pondweed foliage with aromatic solvent greatly reduced the number of tubers in the substratum of an irrigation canal. However, complete...
    Resource Type:
    Masters Thesis

  • Influence of weed density on efficacy of two soil-applied herbicides

    Creator:
    Burrill, L. C.
    Abstract:
    Several studies were conducted to determine the effect of weed density on herbicide efficacy. Diuron [3-(3, 4- dichlorophenyl) -1, 1- dimethylurea] was tested on various densities of Italian ryegrass (Lolium multiflorum Lam. ) under greenhouse and field conditions. Cycloate (S-ethyl N-ethylthiocyclohexanecarbamate) was tested on green foxtail (Setaria viridis (L. )...
    Resource Type:
    Masters Thesis
    Full Text:
    . 7 95 88 67 0. 8 97 92 81 0. 9 97 96 91 1. 0 97 96 91 1. 1 98 97 93 1. 2 97 97 93 Table 2