Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 78 for “"Phytotoxicity"”.
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Study of mechanisms of phytotoxicity of alumina nanoparticles
… of such an effect are yet to be established. The phytotoxicity of aluminum and some of its compounds is well known, but the rapid expansion of nanotechnology resulting in the introduction of new sets of materials in the nanometer range has led to the development of new approaches, experimental …
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An investigation of phytotoxicity and phylogeny of Thapsia garganica
Thapsia garganica is an economically important plant in Libya as it has major influences on domestic livestock production and on the locations that can be used for livestock productivity due to its toxicity to domestic animals. The aims of this thesis were to investigate aspects of this plant …
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The effect of spray adjuvants on the phytotoxicity of herbicides
Greenhouse and field experiments were conducted on the tolerance of wheat (Tritiaum aestivum L.), barley (Hordeum sativum Jess.), rapeseed (Brassiaa napus L.) and flax (Linum usitatissimum L.) to selected nonionic surfactants (Triton XA, Wex and Renex 36) when applied with herbicides. In the …
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Herbicide phytotoxicity response and eradication studies in Miscanthus x giganteus
Past and current research with a novel bioenergy crop, Miscanthus x giganteus (Mxg)—a perennial C4 grass native to East Asia being studied as a potential bioenergy feedstock in the U.S.—were reviewed. Aspects of Mxg research surveyed include its taxonomy, biology, breeding and genetics, end uses …
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Delayed phytotoxicity syndrome in Louisiana rice caused by the use of thiobencarb herbicide
… States. The resultant syndrome is called delayed phytotoxicity syndrome (DPS). This research was conducted to characterize DPS in Louisiana, to compare the toxicity of TB and DTB to rice, to determine uptake and retention rates of TB and DTB by rice, to confirm that soil microorganisms convert TB …
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Studies of the toxicity and phytotoxicity of two soil applied granulated systemic insecticides
… attempt was made to assess the persistence and phytotoxicity of these granulated systemic insecticides following application to the soil. Because Isolan and phorate are comparatively new insecticides in New Zealand, an endeavour was made to establish the relative aphicidal properties of these …
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Speciation and phytotoxicity of mono- and polynuclear aluminum in dilute hydroxy-aluminum solutions
… aluminum (Al) to plants, relationships between phytotoxicity and the chemistry of Al in hydroxyl-dominated systems remain unresolved. First, the ferron (8-hydroxy-7-iodo-5-quinoline-sulfonic acid), aluminon (aurintricarboxylic acid, triammonium salt), and 8-hydroxyquinoline methods were …
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Efficacy, Phytotoxicity, and Cover Crop Response of Herbicide Combinations in Dark Fire Cured Tobacco
… Kentucky University to evaluate efficacy, phytotoxicity, and cover crop response of herbicide combinations in dark fire cured tobacco. A randomized complete block design was used with nine treatments replicated three times. Hydroponic tobacco transplants (c.v. 'TND950') were established on …
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Heavy metal phytotoxicity: the effects of lead on the common reed, Phragmites australis (Cav.) Trin. ex Steud.
Constructed wetlands are increasingly being used as viable biofiltration systems, effectively removing heavy metals such as lead (Pb) from contaminated wastewaters. This study examined the effects of Pb on the life cycle of Phragmites australis (Cav.) Trin. ex Steud (common reed) as increased plant …
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A greenhouse and field comparison of the relative phytotoxicity and nematocidal efficacy of certain chemical soil treatments
no abstract provided by author
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Surfactant Formulations to Enhance Triclopyr Amine Efficacy: Effects on Adhesion, Retention and Contact Phytotoxicity On Three Hardwood Species
… leaf surface (adaxial vs. abaxial) on contact phytotoxicity, adhesion and retention to Acer rubrum, Liquidambar styraciflua and Quercus rubra by triclopyr formulations containing organosilicone surfactants and mixtures of silicone plus conventional surfactants. The adhesion and retention …
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Chemical pinching of Chrysanthemum x morifolium Ramat. with undecanol
… Cultivars varied in their response. Subapical phytotoxicity increased with increasing concentrations and was generally more variable among cultivars than was the pinch response. Concentrations effective in pinching without subapical phytotoxicity resulted in plants similar to manually pinched …
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Management of annual bluegrass and bermudagrass in creeping bentgrass greens
… 200 to 300 g ai ha-1 exhibited 0 to 7% bentgrass phytotoxicity 3 WAIT, regardless of cultivar. Metamifop at 400 to 500 g ai ha-1 exhibited 12 to 18% phytotoxicity on L-93 and Penn A-4, while phytotoxicity on all other cultivars was ≤ 8% 3 WAIT. The phytotoxicity observed on L-93 and Penn A-4 in …
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Remediation of Soil Hydrophobicity on a Coastal USGA Sand-Based Golf Green
… water droplet penetration time (WDPT) method), phytotoxicity, and climate were analyzed during two experimental trials. Phytotoxicity data was collected for Trial I using visual quality ratings and for Trial II using a chlorophyll meter. Phytotoxicity decreased during Trial I. Differences in …
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Understanding the Toxicity Effects of Nanostructures: I. Effect of Physico-chemical Properties on Environmentally Relevant Organismal Toxicity. II. Design of Novel Nanostructures to Reduce Environmental Toxicity while Retaining Functional Properties
… plant was found to be necessary for shape-based phytotoxicity. The surface reactivity was experimentally calculated for each nanomaterial to determine if different surface reactivity between different AgNM shapes could further explain phytotoxicity. It was shown that this value correlated to …
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Dissipation of the herbicides endothall, diquat, and a 1:1 mixture in water, sediment, and Egeria densa
… of the combination and its components and phytotoxicity for egeria (Egeria densa). The tests were conducted in wooden pools illuminated with a 15 hr photoperiod with flourescent lights. Diquat was assayed by a spectrophotometric procedure and endothall was quantified using a gas-liquid …
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Efficacy and residual effects of topramezone and dicamba herbicide on weed control in selected crops.
… number of leaves, grain yield, 100 seed weight, phytotoxicity, damaged and undamaged weeds and weed species present were monitored. Results showed controlled weeds, reduced plant height, bleached leaves and lower yields. Similarities in efficacy was observed; 89.9% between 2 L/ ha and 4 L/ ha …
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The phytotoxic effect of ALS inhibiting herbicide combinations in prairie soils
… in combination with imazamox/imazethapyr. The phytotoxicity and persistence of the herbicides in soil was assessed using an Oriental mustard root inhibition bioassay. The determination of herbicide interaction was made through the comparison of the experimentally observed values to …
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