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Filtering by: Alternative title ssim Report no. 76-12 Remove constraint Alternative title ssim: Report no. 76-12 Contributor advisor sim Appleby, Arnold P. Remove constraint Contributor advisor sim: Appleby, Arnold P.

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  • Factors influencing metribuzin use in strip-planted wheat

    Creator:
    Zeghida, Ali
    Abstract:
    Equipment for strip-till planting is under development in wheat-fallow rotations in the Columbia Basin of Oregon. This involves the absence of tillage during the fallow season. At planting time, the strip-till planter creates a narrow band into which the wheat seed is placed. The area between the rows is undisturbed...
    Resource Type:
    Masters Thesis
    Full Text:
    maintain the suspen- sion. No major differences were observed between comparable formula- tions of Sencor

  • Asulam for tansy ragwort control in alfalfa : field efficacy and selectivity factors

    Creator:
    Harper, Delbert Ray
    Abstract:
    Tansy ragwort (Senecio jacobaea L. ) is a poisonous weed which infests alfalfa fields in western Oregon. Studies were conducted to evaluate the effectiveness of asulam (methyl sulfanilylcarbamate)for control of tansy ragwort in alfalfa and to elucidate factors responsible for its selectivity. In seven replicated field trials in 1973 and...
    Resource Type:
    Dissertation
    Full Text:
    degree of DOCTOR OF PHILOSOPHY L.25 /? /?76'in Agronomic Crop Science presented on Title: ASULAM FOR

  • Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

    Creator:
    Geddens, Ray M.
    Abstract:
    Eight postemergence herbicides were evaluated to determine their influence on the incidence and severity of take-all disease caused by the fungus Gaeumannomyces graminis var. tritici in winter wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid), difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine (amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl (methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
    Resource Type:
    Dissertation
    Full Text:
    presented on July 12, 1985 Title: Postemergence Herbicides and Take-All Disease of Winter Wheat

  • Factors influencing wild oat control with N-benzoyl-N-(3,4-dichlorophenyl) alanine (SD 30053)

    Creator:
    Colbert, Donald Robert
    Abstract:
    Studies were conducted in 1969 and 1970 to evaluate the effectiveness of an experimental herbicide, SD 30053 (alanine, N-benzoyl-N-(3, 4-dichlorophenyl)-, ethyl ester), for wild oat (Avena fatua L.) control in winter cereals. The 1969 field studies showed that postemergence applications of SD 30053 were effective in controlling wild oats. Wild...
    Resource Type:
    Masters Thesis
    Full Text:
    SD 30053 on three dates of applica- tion--19 70 study at the Oakley Farm. 12. The effects of

  • 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:
    . Plants harvested five weeks after planting showed that the magnesium treatment had no significant

  • 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:
    . However, no ryegrass injury was observed on mineral soils unless 12 or 16 kg/ha glyphosate was applied

  • 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:
    asulam 12 days after treatment, but this increase was lost by 24 days after 26 treatment. No yield

  • Field bindweed : a growth stage indexing system and its relation to control with glyphosate

    Creator:
    Whitesides, Ralph E.
    Resource Type:
    Dissertation
    Full Text:
    longest vine of three ecotypes (no difference between ecotypes) of field bindweed grown under similar

  • Biology and control of tuber oatgrass (Arrhenatherum elatius (L.) presl. var. Bulbosum (willd.) spenn.)

    Creator:
    Tanphiphat, Karin
    Abstract:
    Tuber oatgrass (Arrhenatherum elatius (L.) Presl. var. bulbosum (Willd.) Spenn.) is a perennial grass that often becomes a weed problem in Western Oregon. Control efforts using glyphosate often give unsatisfactory results. The effects of several factors on development of tuber oatgrass were investigated. Long days and cool temperatures (16/8h, 20/10C...
    Resource Type:
    Dissertation
    Full Text:
    Philosophy Completed July 12, 1989 Commencement June 1990 APPROVED: Redacted for Privacy -,- Professor

  • Degradation of the herbicide EPTC in three Willamette Valley soils

    Creator:
    Coleman, Quentin Charles
    Abstract:
    EPIC (S-ethyl dipropylthiocarbamate) is a selective herbicide which controls some annual grasses, annual broadleaves, and perennial grasses when incorporated into the soil before planting. In the last few years, reports have been received of certain fields in the Willamette Valley of Oregon in which EPIC was no longer effective. Preliminary...
    Resource Type:
    Masters Thesis
    Full Text:
    received of certain fields in the Willamette Valley of Oregon in which EPIC was no longer effective