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  • 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:
    low plant numbers to determine the effect of density on diuron 57 efficacy. Milligrams dry weight

  • The herbicide HOE 23408; soil persistence, spring wheat cultivar tolerance, and interaction with broadleaf herbicides

    Creator:
    Ivackovich, Branislav D.
    Abstract:
    HOE 23408 [ 4-(2' , 4'-dichlorophenoxy)-phenoxy-u-propionic methylester.1 is a promising new compound for control of wild oats and other grass weeds in small grains. Several factors influencing its use for this purpose were investigated. Greenhouse bioassay studies were conducted in 1975 to determine relative persistence of HOE 23408 in four...
    Resource Type:
    Masters Thesis
    Full Text:
    as a test plant. Soil from each of three application timings at all four locations contained

  • Interaction between glyphosate and certain s-triazine herbicides

    Creator:
    Somabhi, Montien
    Abstract:
    Investigations were made in the field, greenhouse, growth chamber, and laboratory to: (a) observe the general activity of N- (phosphonomethyl)glycine (glyphosate); (b) determine the extent of its interaction with certain s-triazine herbicides; and (c) find an explanation for such an interaction. Greenhouse and growth chamber studies substantiated other observations that...
    Resource Type:
    Dissertation
    Full Text:
    visible plant injury appeared. Glyphosate did not affect root-shoot ratios in wheat, measured on a dry

  • 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 root uptake of the herbicide in these two weed species. Factors such as plant biotype, stage of

  • Asulam in western Oregon pastures : broadleaf dock control and tolerance of important grass and legume species

    Creator:
    Majek, Bradley A.
    Abstract:
    In previous research in Europe, asulam (methyl sulfanilylcarbamate) was found to be a potentially useful herbicide for controlling broadleaf dock Rumex obtusifolius L. ) in permanent pastures. Asulam was also reported to have a low margin of safety when used on common pasture species. Field studies were conducted in western...
    Resource Type:
    Masters Thesis
    Full Text:
    Grasses 53 Clover s 57 ASULAM EFFECT ON CRUDE PROTEIN PERCENTAGE IN TALL FESCUE 59 Materials and Methods