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  • Sugarbeet response to mechanical and chemical manipulation of the shoot apical meristem

    Creator:
    Eberlein, Charlotte Vawter
    Resource Type:
    Masters Thesis
    Full Text:
    . Sugar Beet Technol. 13:21-26. 4, Carte:, J. N., C. H. Pair, and D. T. Westerman. 1975. Effect of

  • 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:
    approved. Arnol . App by Jean H. Dawson The interference of barnyardgrass (Echinochloa crus- galli

  • The response of tomatoes to atrazine as affected by magnesium and photoperiod

    Creator:
    Brenchley, Ronald Glenn
    Abstract:
    Studies were conducted to determine the nature of the interaction between atrazine (2-chloro-4-ethylamino-6-isopropylaminos- triazine) and magnesium on tomatoes. This interaction was studied under two light regimes: continuous light and a 12-hour photoperiod. Tomato plants were grown in sand cultures at three levels of magnesium fertilization. Four weeks after planting, atrazine...
    Resource Type:
    Dissertation
    Full Text:
    summarized as follows: Cl-C: N - cyanogen cyanuric chloride chloride CH3CH2NH2 Cl 4 H 2, 6-dichloro

  • 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:
    presented on March 4, 1982 Title: FACTORS INFLUENCING METRIBUZIN USE IN STRIP-PLANTED WHEAT Abstract

  • 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:
    : Redacted for Privacy , , Arnold P. Appleby The behavior of metribuzin [4-amino-6-(1,1- dimethylethyl)-3

  • Effects of lactofen herbicide on cellular uptake of glyphosate herbicide in malva parviflora L.

    Creator:
    Wells, Barbara Heard
    Abstract:
    Time-course growth chamber studies were conducted on little mallow (Malva parviflora L.) to determine whether sublethal doses of lactofen (1'-(carboethoxy)ethyl-5-[2-chloro-4-(trifluoromethyl) phenoxy]-2- nitrobenzoate) would enhance uptake of glyphosate (N'-(phosphonomethyl) glycine) by altering membrane permeability. Lactofen-induced membrane peroxidation was determined by harvesting leaf discs, measuring stress ethylene evolution, and recording increases in...
    Resource Type:
    Dissertation
    Full Text:
    system, live intact membranes are required for ethylene formation. Lag periods between 1 to 4 h have

  • 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:
    )4- propyl-1,3-dioxolan-2-ylmethyl]-1-H-1,2,4-triazolel at flag leaf emergence and at heading

  • Stimulation of plant growth by sub-lethal concentrations of herbicides

    Creator:
    Wiedman, Steven John
    Abstract:
    Studies were conducted to determine the extent and nature of sub-lethal effects of herbicides on plant growth. At least one herbicide from each major chemical class of herbicides was evaluated under greenhouse conditions. Oat plants were grown in sand culture to eliminate soil interferences. Herbicides were applied pre-emergence in nutrient...
    Resource Type:
    Dissertation
    Full Text:
    ) (Degree) in FARM CROPS presented on (Major) 4, 19'47 Title: STIMULATION OF PLANT GROWTH BY SUB-LETHAL

  • Effect of a pre-irrigation period on the activity of ethofumesate applied to dry soil

    Creator:
    McAuliffe, David
    Abstract:
    Applications of ethofumesate in Oregon have been observed from previous research and from commercial use to be less effective when applied to dry soils, even if subsequent precipitation occurred within a few days. Two field studies were established in the summer of 1979 using sweet corn (Zea mays L. 'Jubilee')...
    Resource Type:
    Masters Thesis
    Full Text:
    was applied to dry soil followed by 4 h of irrigation over the entire experimental area, either 48

  • 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:
    stem node was visible its h 7111=1. IN IMIN ---;:1 15111111. Figure 4. Tank-mix treatment of 2.0 lb