Index Catalog // ScholarsArchive@OSU

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Creator:: Geddens, Ray M.
Abstract:: Eight postemergence herbicides were evaluated to determine their influence on the incidence and severity of take-all disease caused by the fungus Gaeumannomyces graminis var. tritici in winter wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid), difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine (amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl (methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
Resource Type:: Dissertation
Full Text:: OF Ray M. Geddens for the degree of Doctor of Philosophy in Crop Science and Botany/Plant Pathology

Control of volunteer legumes during establishment of legume seed crops with activated carbon bands and non-selective herbicides

Creator:: Rolston, M. Philip
Resource Type:: Dissertation
Full Text:: dipropylthiocarbamate) seeded with alfalfa at 10 mg/m of row controlled volunteer perennial ryegrass (Lo lium perenne L

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:: --2V.4-, 3--- /70- Typed by Gloria M. Foster for Allen David Fechtig ACKNOWLEDGMENT It is with deep

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:: 105 M. At this rate, cell length was almost twice the control and equal to the effects produced by

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:: M The effect of diuron on both carotenoid and chlorophyll pigments (Experiment 1). 70 N The effect

Some physiological and biochemical aspects of haloxyfop herbicidal activity alone or mixed with dicamba

Creator:: Alvarado, Renan A.
Resource Type:: Dissertation
Full Text:: nutrient solution. Plants were placed in a growth chamber adjusted to provide an average of 400 AE m-2s-1

The influence of certain environmental and edaphic factors on germination and emergence of Bromus tectorum L.

Creator:: Thill, Donald Cecil, 1950-
Abstract:: The influence of certain environmental and edaphic factors on the germination and emergence of downy brome (Bromus tectorum L.) was investigated in the laboratory. A preliminary study was conducted to determine the osmotic stability of mannitol and polyethylene glycol 20,000 (PEG) solutions, which are commonly used to simulate water stress...
Resource Type:: Dissertation
Full Text:: temperature on germination of six range grasses. Agron. J. 52:159-162. 14. Michel, B. E. and M. R. Kaufmann

Interaction between glyphosate and certain s-triazine herbicides

Creator:: Somabhi, Montien
Abstract:: Investigations were made in the field, greenhouse, growth chamber, and laboratory to: (a) observe the general activity of N- (phosphonomethyl)glycine (glyphosate); (b) determine the extent of its interaction with certain s-triazine herbicides; and (c) find an explanation for such an interaction. Greenhouse and growth chamber studies substantiated other observations that...
Resource Type:: Dissertation
Full Text:: , 4.98x10 -4, 9.95x10-4, and 1.97x10 -3 M glyphosate solutions in which 0. 1% v/v of X-77 surfactant was

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:: Agriculture (IITA). Special thanks to Andrew Ker and Mrs. M. Beaussart, for their prompt actions in solving

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:: of different cuticle abrasion levels (N = none, L = low, M = medium, H = high) on glyphosate uptake

ScholarsArchive@OSU

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Control of volunteer legumes during establishment of legume seed crops with activated carbon bands and non-selective herbicides

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

Stimulation of plant growth by sub-lethal concentrations of herbicides

A proposed mechanism for diuron-induced phytotoxicity

Some physiological and biochemical aspects of haloxyfop herbicidal activity alone or mixed with dicamba

The influence of certain environmental and edaphic factors on germination and emergence of Bromus tectorum L.

Interaction between glyphosate and certain s-triazine herbicides

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

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

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