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Factors influencing pre-emergent weed control with chemicals in vegetable crops

Creator:: Kosesan, Willy Henry
Resource Type:: Masters Thesis
Full Text:: ACKNOVLEDGLt1ENTS The writer wishes to express his deep appreciation to Professor Virgil H. Freed for the many

Microbial degradation of atrazine in soils

Creator:: Skipper, H. D. (Horace D.)
Abstract:: Atrazine is an asymmetrical s-triazine herbicide used pre- and post-emergence for the control of weeds in many crops. Under conditions considered unfavorable for microbial activity, atrazine may persist in soils for extended periods of time. However, the significance of chemical versus microbial degradation is not known. This study was conducted...
Resource Type:: Masters Thesis
Full Text:: . To Drs. V. H. Freed and A. P. Appleby for helpful discussions during phases of this study and the

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

The effects of the herbicides Diquat and Dichlobenil on pond invertebrates

Creator:: Wilson, Dennis Carl
Abstract:: The acute toxicity of Diquat (1:1-ethylene-2:2' dipyridylium dibromide) and Dichlobenil (2, 6-dichlorobenzonitrile) to six selected pond invertebrates was determined using the median tolerance limit estimation method. Diquat was more toxic to the amphipod, Hyalella azeteca than to the aquatic insects Callibaetis, Limnephilus, Enallagma, Libellula, and Tendipedidae. The addition of mud...
Resource Type:: Masters Thesis
Full Text:: toxicity to H. azeteca over 96 hours. The invertebrates were generally more tolerant to diquat than the

The differential response of Ligustrum ovalifolium and Pyracantha spp. to simazine

Creator:: Rauch, Fredrick Donald
Resource Type:: Masters Thesis
Full Text:: P. crenato- serrata treated with radioactive simazine 53 Table Page H Percentage of

Interaction of cycloate with postemergence herbicides on sugarbeets and weeds

Creator:: Olson, Phillip David Leroy
Resource Type:: Masters Thesis
Full Text:: America 3 , pp. 5-8. The chemical name and structure for pyrazon are as follows: CL 0 H N 2 5-amino

Surfactant effects on bromacil and picloram adsorption by Oregon soils

Creator:: Gaynor, John Donald
Abstract:: The physical and chemical properties of soils greatly affect the toxicity of bromacil and picloram. Consequently, a knowledge of the parameters which influence the soil inactivation of these herbicides is necessary to determine proper application rates for good weed control. Enhancement in phytotoxicity with the addition of surfactants or surface...
Resource Type:: Masters Thesis
Full Text:: , J. Schreiber, H. Skipper and F. Colbert for their encouragement and invigorating discussions

An economic analysis of alternative herbicide practices

Creator:: Coulston, Lane Edward
Abstract:: There is a critical lack of economic information in the area of chemical weed control. This paper is intended to stimulate study in this area. The objective is to develop a method of economic analysis of alternative herbicide practices. The data used were taken from a Druchamp winter wheat trial...
Resource Type:: Masters Thesis
Full Text:: Cole, H. and G. H. Berggren. Economic importance of herbicides. Farm Economics (Pennsylvania State

Some herbicidal properties of 2-chloro 2', 6'-diethyl - N - (methoxymethyl) acetanilide

Creator:: Grandal, Osvaldo Trivelli
Abstract:: Studies were conducted to determine the site of 2-chloro 2', 6'-diethyl-N-(methoxymethyl) acetanilide (CP 50144) toxicity on barnyardgrass (Echinocloa crusgalli (L.) (Beauv.). This was done by means of a technique which used separate layers of treated soil to expose differentially the roots and/or the shoots of barnyardgrass seedlings. Coleoptiles that emerged...
Resource Type:: Masters Thesis

Foliage applications of terbacil to peppermint (Mentha piperita) and several weed species

Creator:: Radosevich, Steven R.
Abstract:: Several studies were conducted to determine the feasibility of using terbacil (3-tert-butyl-5-chloro-6-methyluracil) postemergence to weeds and peppermint (Mentha piperita L.). Three nonionic surfactants, four nonphytotoxic oils, and a liquid fertilizer were each combined with 0.5 lb ai/A terbacil in 35 gallons of water per acre. Weed species tested include: redroot...
Resource Type:: Masters Thesis
Full Text:: formula is: -H .0 Cl-C -C-(CH3)3 The pure chemical is a white crystalline solid which melts at 175

ScholarsArchive@OSU

Factors influencing pre-emergent weed control with chemicals in vegetable crops

Microbial degradation of atrazine in soils

Factors influencing metribuzin use in strip-planted wheat

The effects of the herbicides Diquat and Dichlobenil on pond invertebrates

The differential response of Ligustrum ovalifolium and Pyracantha spp. to simazine

Interaction of cycloate with postemergence herbicides on sugarbeets and weeds

Surfactant effects on bromacil and picloram adsorption by Oregon soils

An economic analysis of alternative herbicide practices

Some herbicidal properties of 2-chloro 2', 6'-diethyl - N - (methoxymethyl) acetanilide

Foliage applications of terbacil to peppermint (Mentha piperita) and several weed species

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