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:: Graduate School Date thesis is presented D-t.,y,, 07/ Typed by Mary Jo Stratton for Charles Earl Stanger

Activity and persistence of five postemergence grass herbicides in soil

Creator:: Martin, David C. (David Christopher), 1949-
Resource Type:: Masters Thesis
Full Text:: herbicides in soil AN ABSTRACT OF THE THESIS OF David C. Martin for the degree of Master of Science in

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:: Burrill, G. Crabtree, and D. C. England for their time and support they have given me. I also thank R. D

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:: remaining 7. The plants were maintained in a growth chamber with a 14-h photoperiod, 27°C day temperature

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:: extended to Dr. Thomas C. Moore, Dr. W. W. Chilcote and Dr. Michael C. Mix for serving on my committee

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:: evaluators at two locations. c Means sharing the same line are not significantly different at the 5% level

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:: . Proc. 27th South. Weed Sci. Soc. Page 378. 22. Waggoner, T. B., C. A. Anderson, J. A. Ciarletta, and

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:: from seeds and corms. A) average shoot height, B) dry weight per plant, C) number of tillers per plant

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:: requirement for vernalization in order to flower. In greenhouse studies, cold treatment (5 + 2 C) of 2, 4

Comparisons of morphology and susceptibility to herbicides of two yellow nutsedge (Cyperus esculentus L.) varieties

Creator:: Costa, Jaime
Resource Type:: Masters Thesis
Full Text:: C. esculentus L. var. leptostachyus Boeck. 16 4 Tuber development in two yellow nutsedge varieties

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

Comparisons of morphology and susceptibility to herbicides of two yellow nutsedge (Cyperus esculentus L.) varieties

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