Index Catalog // ScholarsArchive@OSU

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:: A proposed mechanism for diuron-induced phytotoxicity

Activity and persistence of five postemergence grass herbicides in soil

Creator:: Martin, David C. (David Christopher), 1949-
Resource Type:: Masters Thesis
Full Text:: -5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy-j-propanoic acid) are all members of a new group of

An evaluation of weed interference in rice grown on hydromorphic soils in West Africa

Creator:: Diop, Amadou Makhtar
Abstract:: Field, screenhouse, and laboratory experiments were conducted to study weed interference in rice grown on hydromorphic soils at the International Institute of Tropical Agriculture (IITA) at Ibadan, Nigeria. Rice and weeds emerged at the same time, 1 week after planting. Weed dry weight was significantly reduced when the crop was...
Resource Type:: Dissertation
Full Text:: Interference in Rice Grown on Hydromorphic Soils in West Africa Abstract approved:_Redacted for Privacy A. P

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:: sunflower leaves in a pressure chamber over intervals of 0.2 to 0.4 bars. Three distinct fractions were

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:: for privacy Arnold P. iffprgeby Tansy ragwort (Senecio jacobaea L. ) is a poisonous weed which

Asulam in western Oregon pastures : broadleaf dock control and tolerance of important grass and legume species

Creator:: Majek, Bradley A.
Abstract:: In previous research in Europe, asulam (methyl sulfanilylcarbamate) was found to be a potentially useful herbicide for controlling broadleaf dock Rumex obtusifolius L. ) in permanent pastures. Asulam was also reported to have a low margin of safety when used on common pasture species. Field studies were conducted in western...
Resource Type:: Masters Thesis
Full Text:: lb/A in early spring with little or no damage to swards containing a large percentage of tolerant

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

Biology and control of tuber oatgrass (Arrhenatherum elatius (L.) presl. var. Bulbosum (willd.) spenn.)

Creator:: Tanphiphat, Karin
Abstract:: Tuber oatgrass (Arrhenatherum elatius (L.) Presl. var. bulbosum (Willd.) Spenn.) is a perennial grass that often becomes a weed problem in Western Oregon. Control efforts using glyphosate often give unsatisfactory results. The effects of several factors on development of tuber oatgrass were investigated. Long days and cool temperatures (16/8h, 20/10C...
Resource Type:: Dissertation
Full Text:: . bulbosum (Willd.) Spenn.) is a perennial grass that often becomes a weed problem in Western Oregon

Biology of Bromus rigidus : interference in winter wheat, seed longevity in the soil, and vernalization requirements for flowering

Creator:: Gleichsner, Jean Ann
Resource Type:: Dissertation
Full Text:: inches long (Hawkes et al., 1985). Ripgut brome has little forage value except for a short period

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:: troublesome competition occurred when weeds germinated at the same time or a little later than field beans

ScholarsArchive@OSU

A proposed mechanism for diuron-induced phytotoxicity

Activity and persistence of five postemergence grass herbicides in soil

An evaluation of weed interference in rice grown on hydromorphic soils in West Africa

Apoplastic distribution of atrazine and glyphosate in intact sunflower leaves

Asulam for tansy ragwort control in alfalfa : field efficacy and selectivity factors

Asulam in western Oregon pastures : broadleaf dock control and tolerance of important grass and legume species

Behavior of metribuzin and ethylmetribuzin in soil

Biology and control of tuber oatgrass (Arrhenatherum elatius (L.) presl. var. Bulbosum (willd.) spenn.)

Biology of Bromus rigidus : interference in winter wheat, seed longevity in the soil, and vernalization requirements for flowering

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

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