Search Constraints

Start Over
Filtering by: Subject Soils -- Herbicide movement Remove constraint Subject: Soils -- Herbicide movement Academic Affiliation Crop Science Remove constraint Academic Affiliation: Crop Science

Search Results

  • The effect of soil factors on glyphosate availability in soil

    Creator:
    Kawate, Michael Ken
    Abstract:
    Glyphosate (N-(phosphonomethyl)glycine) is an effective foliar-applied herbicide with broad-spectrum activity. Greenhouse and laboratory experiments were conducted to determine the importance of soil moisture, autoclaved soil, soil type, sphagnum peat, soil pH, added phosphorus, and plant residues on crop establishment and growth when glyphosate was applied before emergence of the crop....
    Resource Type:
    Dissertation
    Full Text:
    SOIL. GENERAL INTRODUCTION Glyphosate is an effective foliar-applied herbicide with broad-spectrum

  • Persistence and accumulation of clopyralid (3,6-dichloropicolinic acid) in soil

    Creator:
    Tanphiphat, Karin
    Abstract:
    Field studies were started at Hyslop Farm, Corvallis, Oregon in 1984 to determine the soil persistence of the herbicide clopyralid (3,6-dichloropicolinic acid) under cropping situations. The herbicide was sprayed on bare soil at the proposed use rate of 0.14 kg/ha in the spring and on the same plots at a...
    Resource Type:
    Masters Thesis
    Full Text:
    started at Hyslop Farm, Corvallis, Oregon in 1984 to determine the soil persistence of the herbicide

  • Behavior of metribuzin and ethylmetribuzin in soil

    Creator:
    Peek, Daniel C.
    Abstract:
    The behavior of metribuzin [4-amino-6-(1,1- dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] and ethyl-metribuzin (4-amino-6-(1,1-dimethylethyl)-3- (ethylthio)-1,2,4-triazin-5(4H)-one] in soil was studied to determine if differences in herbicide behavior in soil could explain (a) the inconsistent herbicidal activity of these chemicals and (b) the greater activity of metribuzin, as compared to ethyl-metribuzin. Metribuzin had higher activity than ethyl-metribuzin...
    Resource Type:
    Dissertation
    Full Text:
    quartz sand was lower than in soil when drainage could occur. Herbicide movement was greatest and

  • Interaction of ethofumesate with dry soil

    Creator:
    McAuliffe, David
    Abstract:
    Previous studies have shown loss of ethofumesate activity when the herbicide was applied to dry soil (2% w/w moisture content) in both field and greenhouse studies, even when rainfall or irrigation was received within a few days. Laboratory studies were conducted to determine the mechanism for this activity loss. Dry...
    Resource Type:
    Dissertation
    Full Text:
    etho- fumesate degradation. To determine the effect of soil type, the herbicide was applied to air

  • Persistence of prodiamine and norflurazon herbicides in soil and their activity on alfalfa rotational crops

    Creator:
    Fischer, Vernon F.
    Abstract:
    Norflurazon [4-chloro-5-(methylamino)-2(3-(trifluoromethyl) phenyl)- 3(2H)- pyridazinone] and prodiamine (N3, N3-di-n-propy1-2,4- dinitro-6-(trifluoromethyl)-m-phenylenediamine) are two herbicides being considered for weed control in alfalfa. Rotational crops following alfalfa may be sensitive to residues of these herbicides. Studies were conducted in Oregon and Washington to examine the soil persistence and activity of these herbicides on...
    Resource Type:
    Masters Thesis
    Full Text:
    12 Herbicide soil residue analysis 13 Plant-back study 13 RESULTS AND DISCUSSION CONCLUSIONS