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Filtering by: Creator Ray, R. D. Remove constraint Creator: Ray, R. D. Advisor Appleby, Arnold P. Remove constraint Advisor: Appleby, Arnold P. Committee Member Chilcote, David Remove constraint Committee Member: Chilcote, David

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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:
    . I also wish to thank all my friends in Corvallis especially Daryl Ehrensing, Ray Geddens, Mike

  • The effect of 2,4-D on the respiration rate and ethylene production of Bartlett pears and Red Delicious apples

    Creator:
    Fechtig, Allen David
    Abstract:
    After nearly 20 years of commercial use in orchards without apparent tree injury in Oregon and Washington, 2,4-D [(2,4-dichlorophenoxy) acetic acid] was reported in 1970 to cause injury to apple and pear trees in Washington. In the early 1970's, there was widespread concern among growers, researchers, and processors in the...
    Resource Type:
    Dissertation
    Full Text:
    OF 2,4-D ON THE RESPIRATION RATE AND ETHYLENE PRODUCTION OF BARTLETT PEARS AND RED DELICIOUS APPLES

  • 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:
    . 4Geddens, R. M., A. P. Appleby, and B. D. Brewster. 1984. Nonherbicidal effects of dinoseb application in

  • The influence of light, temperature and humidity on the herbicidal activity of bromoxynil (3,5-dibromo-4-hydroxybenzo-nitrile) on Amsinckia intermedia

    Creator:
    Zimmerman, Martin (Martin Joseph)
    Abstract:
    The use of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) to control broadleaf weeds in cereal crops has become widespread. This herbicide has not always performed satisfactorily for reasons which were not clearly evident. The effects of temperature, light and humidity on the herbicidal activity of bromoxynil on coast fiddleneck, Amsinckia intermedia, were studied. Fiddleneck...
    Resource Type:
    Masters Thesis
    Full Text:
    to 2,4-D at vary- ing temperatures. At 10 C it took 10 p.g. of 2, 4 -D to cause leaf curling. At 20

  • 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:
    which penetrate the plasmalemma by passive diffusion and do not act like weak acids (e.g. 2,4 -D