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  • Some physiological and biochemical aspects of haloxyfop herbicidal activity alone or mixed with dicamba

    Creator:
    Alvarado, Renan A.
    Resource Type:
    Dissertation
    Full Text:
    , 7500 X. All bars are equivalent to 1 Am. 4.4 Electron micrograph of tangential sections from 85 tall

  • Indole-3-acetic acid in (2-chloroethyl)-trimethylammonium chloride-treated club wheat (Triticum aestivum compactum)

    Creator:
    Gould, Walter Leonard
    Abstract:
    Studies were conducted to verify the existence of IAA in wheat seedlings and to determine the effect of (2-chloroethyl)-trimethyl-ammonium chloride (CCC) on the IAA content of club wheat, Triticum aestivum compactum, variety Omar. The shoots of CCC-treated and untreated wheat plants were extracted with ethanol, the plant extract purified, separated...
    Resource Type:
    Dissertation
    Full Text:
    paper chromatography, and subjected to bioassay and color test. A refinement was made in the procedure

  • Factors affecting selective weedy rye (Secale sp.) control in winter wheat with the herbicide ethiazin

    Creator:
    Diener, Phillip R.
    Abstract:
    Weedy rye (Secale spp.) is a weed in the winter-wheat- growing regions in the Pacific Northwest and surrounding regions. Ethiazin (4-amino-6-(1,1-dimethylethyl)-3- (ehtylthio)-1,2,4-triazine-5 (4H)-one) has shown selective control of weedy rye in the cultivar 'Stephens', (Triticum aestivum). Field, greenhouse, and outdoor pot experiments were conducted to determine factors influencing selectivity. Field...
    Resource Type:
    Masters Thesis
    Full Text:
    his paper (1969), he was uncertain about whether or not the weedy rye stand found in these other

  • 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:
    Emergence and Growth. Literature Cited CHAPTER 3. MISCELLANEOUS STUDIES INVESTIGATING SOIL ACTIVITY OF

  • Influence of Norbak, Dacagin, and Vistik on spray drift, volatility, adherence, and efficacy of several herbicides

    Creator:
    Ekins, Walter Leo
    Abstract:
    Norbak, Dacagin, and Vistik, when mixed with a spray solution, each have the unique property of increasing the viscosity of that solution. This property has been used commercially for the reduction of spray drift. Studies were made of the drift control adjuvants to determine the following: (1) the effect of...
    Resource Type:
    Masters Thesis
    Full Text:
    per acre of 16 -20 -0, and the wheat and barley sown at 85 pounds per acre with a 10 -foot grain

  • 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:
    62 68 77 4448 4448 3903 3664 0 0. 6 1. 1 1. 7 2.2 70 83 3702 4.5 85 99 3846 Application date

  • 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:
    placed in small paper bags and dried at 90 C for 24 hours. Dry weights were recorded. Results The

  • 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:
    Mettler balance. 16 In New Zealand, foliage was placed in paper bags and dried in an oven at 80°C. A

  • A proposed mechanism for diuron-induced phytotoxicity

    Creator:
    Stanger, Charles Earl, 1929-
    Abstract:
    Previous research has shown that specific carotenoid pigments function through oxidation-reduction reactions to protect chlorophyll from photooxidation in the presence of reduced nicotinamide adenine dinucleotide phosphate (NADP). The hypothesis that diuron (3-(3, 4- d chloropheny1)-1, 1-dimethylurea) initiates phytotoxicity by inhibition of NADPH synthesis was examined. All experiments were conducted in...
    Resource Type:
    Dissertation
    Full Text:
    placed in the vial and were long enough to reach the bottom. Waxed paper (parapaper) was wrapped around

  • Apoplastic distribution of atrazine and glyphosate in intact sunflower leaves

    Creator:
    Jachetta, John Joseph
    Abstract:
    Apoplastic distribution patterns of atrazine [2-chloro-4-(ethylamino)- 6-(isopropylamino)-s-triazine], glyphosate [N-(phosphonomethyl)- glycine], the naturally occurring apoplastic leaf solutes, and the apoplastic dye PTS (trisodium 3-hydroxy-5,8,10-pyrenetrisulfonate) were compared. Aliquots of sap were expressed from intact sunflower leaves in a pressure chamber over intervals of 0.2 to 0.4 bars. Three distinct fractions were detected...
    Resource Type:
    Dissertation
    Full Text:
    petiole base, after which the water was removed by blotting with tissue paper. This measure insured an