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Filtering by: Creator Patisaul, H. B. Remove constraint Creator: Patisaul, H. B. Advisor Appleby, Arnold P. Remove constraint Advisor: Appleby, Arnold P.

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  • Sethoxydim herbicide in red fescue and bentgrass : levels and mechanisms of selectivity

    Creator:
    Butler, J. Hugh B.
    Abstract:
    The herbicide rate required to reduce growth by 50% (GR₅₀) of 11 cultivars of red fesue (Festuca rubra L. and F. rubra ssp. commutata) and for four cultivars of bentgrass (Agrostis tenuis Sibth. and A. stolonifera L. var. palustris) to sethoxydim (2-[1-(ethoxyimino) butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one) was determined in greenhouse and laboratory experiments....
    Resource Type:
    Dissertation
    Full Text:
    and mechanisms of selectivity AN ABSTRACT OF THE THESIS OF J. Hugh B. Butler for the degree of

  • Factors influencing barnyardgrass (Echinochloa crus-galli) control with diclofop

    Creator:
    West, Lynn Douglas
    Abstract:
    Diclofop (2- [4 -(2, 4-dichlorophenoxy)phenoxy] propanoic acid), formulated as the methyl ester, selectively kills barnyardgrass [Echinochloa crus -galli (L.) Beauv.] in several crops when applied postemergence. Studies were conducted to determine the effect of soil moisture, barnyardgrass age, and site of exposure on control of barnyardgrass with diclofop. Soil moisture...
    Resource Type:
    Dissertation
    Full Text:
    19.8 a 6.8 c 8.7 d -3.4 b -9.6 b 4.3 c -20.0 c -8.8 b 9.4 b 10.2 c -1.7 a -8.9 h 5.3 c -19.1 c -9.9 b

  • Selective control of volunteer wheat (Triticum aestivum (L.) em. Thell.) in new seedlings of alfalfa (Medicago sativa L.) with fluazifop-butyl and sethoxydim

    Creator:
    Ott, Pablo
    Abstract:
    Volunteer winter wheat (Triticum aestivum 'Daws') severely suppressed growth of fall-planted alfalfa (Medicago sativa (L.) 'Vernal') seedlings. Wheat competition began soon after alfalfa emerged and continued until the first forage harvest the following May. Alfalfa yield at the first cutting was reduced by 1% for each day volunteer wheat was...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy Jean H. Dawson( 14 Arnold Pf Xpplebyf Volunteer winter wheat (Triticum

  • 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

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

    Creator:
    Eberlein, Charlotte Vawter
    Resource Type:
    Masters Thesis
    Full Text:
    Arnold P. Appleby / Redacted for privacy J. H. Dawson Sugarbeets respond to excess late-season N with

  • Sorption and phytotoxicity of triazine herbicides in neutral and calcareous soils

    Creator:
    Colbert, Floyd Oral
    Resource Type:
    Dissertation
    Full Text:
    solubility. 4 4 Hurle, K. B. and V. H. Freed, unpublished data, 1970. Oregon State University, Corvallis

  • 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:
    . William W. Chilcote, W. R. Furtick, and Frank H. Smith for serving as members of the graduate committee

  • 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:
    thank Dr. H. Ronald Cameron, Dr. Michael D. Glenn, Dr. Donald Claypool, and. Dr. Willis McCuistion for

  • 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:
    could explain (a) the inconsistent herbicidal activity of these chemicals and (b) the greater activity

  • 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:
    bromide (bromomethane), b) 2.25 kg/ha phorate diethyl S-[(ethylthio)methyl] phosphorodithioate} preplant