Search Constraints

Start Over
Filtering by: Creator Larsen, M. M. Remove constraint Creator: Larsen, M. M. Contributor advisor sim Appleby, Arnold P. Remove constraint Contributor advisor sim: Appleby, Arnold P. Degree Level Master's Remove constraint Degree Level: Master's

Search Results

  • Effect of two methylcarbamates on the toxiciity of isopropyl m-chlorocarbanilate (chlorpropham) to safflower (Carthamus tinctorius L.) and common buckwheat (Fagopyrum esculentum Moench.)

    Creator:
    Kirkland, Kenneth
    Abstract:
    Addition of the methylcarbamate compounds p-chlorophenyl N-methylcarbamate (PPG-124) and 1-naphthyl N-methylcarbamate (carbaryl) to various herbicides has resulted in reduced rates of degradation. Carbaryl affects the degradation of certain herbicides in both plants and soils while PPG-124 has only been demonstrated to affect degradation in soils. Both these materials are effective...
    Resource Type:
    Masters Thesis
    Full Text:
    METHYLCARBAMATES ON THE TOXICITY OF ISOPROPYL M-CHLOROCARBANI LATE (CHLORPROPHAM) TO SAFFLOWER (CARTHAMUS

  • The soil persistence and crop selectivity of 3, 6-dichloropicolinic acid

    Creator:
    Olson, David Lloyd
    Abstract:
    Field studies were conducted in 1973 and 1974 to determine the soil persistence of the herbicide M-3785 (containing 0.5 lb a.e. Dowco 290 + 2.0 lb a.e. 214D/gallon). under cropping situations. Spring barley (Hordeum distichon L. 'Hannchen') was grown at Corvallis, Oregon and winter wheat (Triticum aestivum L. 'Nugaines.') was...
    Resource Type:
    Masters Thesis
    Full Text:
    to determine the soil persistence of the herbicide M-3785 (containing 0.5 lb a.e. Dowco 290 + 2.0

  • 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
    Full Text:
    supplemental pesticides included, in addition to dinoseb, a) preplant fumigation with 50 g/m 2 methyl

  • 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:
    -(trifluoromethyl)-m-phenylenediamine) are two herbicides being considered for weed control in alfalfa. Rotational

  • 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:
    (3.5% 0.M.), Newberg sandy loam (1.7% O.M.), and silica sand (0.5% O.M.). Injury from a 1.12 kg/ha

  • Influence of soil moisture on the movement of bromacil in soil

    Creator:
    Ross, Claude Gray
    Abstract:
    In previous research, bromacil gave good performance when it was applied in early fall with fairly dry soil conditions and before the fall germinating weeds had started growth. On the other hand, if bromacil was applied in late November, December, or January on nearly saturated soil with weeds that had...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Claude Gary Ross for the M. S. in

  • Competitive effects and control of weeds in winter wheat on the Anatolian Plateau, Turkey

    Creator:
    Tezel, Cengiz
    Abstract:
    Wheat is the major crop produced on the Anatolian Plateau of Turkey. Annual weeds cause large yields reductions in the wheat crop. Several formulations of 2, 4-D and mixtures of 2, 4-D and 2,4, 5-T are the only materials currently available for use in Turkey on wheat. The objective of...
    Resource Type:
    Masters Thesis
    Full Text:
    go to Dr. Arnold P. Appleby and Dr. Homer M. Hepworth who, between them, managed to direct 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:
    % silt % clay pH me/100g 0.M, >0.05mm 0.05- 0.002hun <0.002mm 6 17.11 1.74 50.12 32.33 17.55 13 The

  • Selective control of Cirsium arvense (L.) Scop. in Mentha piperita L. with 3,6-dichloropicolinic acid

    Creator:
    Whitesides, Ralph E.
    Abstract:
    A series of field experiments was conducted during 1975 and 1976 to examine peppermint tolerance and Canada, thistle response to Dowco 290 (3, 6- dichloropicolinic acid). Peppermint oil yield and Canada thistle density were considered most important in evaluating experimental results. Peppermint tolerance to Dowco 290 was studied in weed-free...
    Resource Type:
    Masters Thesis
    Full Text:
    available for research work according to Haagsma (1975): M-3785 -- contains 2 lbs a. e. (acid equivalent

  • Interference of annual weeds in seedling alfalfa

    Creator:
    Fischer, Albert J.
    Abstract:
    The interference of barnyardgrass (Echinochloa crusgalli), pigweed (Amaranthus retroflexus),downy brome (Bromus tectorum),and tumble mustard (Sisymbrium altissimum) with alfalfa was studied. Alfalfa was seeded with each of the four weeds on August 14 and September 15, 1981, and on April 13, 1982. Alfalfa also was seeded on August 27, 1981, with...
    Resource Type:
    Masters Thesis
    Full Text:
    July 26, 1983 Typed by Madeleine M. Fischer for Albert J. Fischer DEDICATION This thesis is