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Article
Can Pesticides Dissolved in Runoff and Exposed to Maturing Rice (Oryza sativa) Plants be Transferred to Seeds?
Agriculture’s global challenge to feed an estimated 7.7 billion people is further exacerbated by less available cropland for production and rapidly changing climate patterns. Pesticides are often utilized to m...
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Article
Can Rice (Oryza sativa) Mitigate Pesticides and Nutrients in Agricultural Runoff?
Phytoremediation of nutrients and pesticides in runoff is a growing conservation effort, particularly in agriculturally intensive areas such as the lower Mississippi River Valley. In the current study, rice (Oryz...
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Article
Drying and Storage Methods Affect Cyfluthrin Concentrations in Exposed Plant Samples
Standard procedures do not exist for drying and storage of plant samples prior to chemical analyses. Since immediate analysis is not always possible, current research examined which plant drying and storage me...
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Article
Diazinon and Permethrin Mitigation Across a Grass–Wetland Buffer
Vegetated buffers of different designs are often used as edge-of-field treatment practices to remove pesticides that may be entrained in agricultural runoff. However, buffer system efficacy in pesticide runoff...
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Article
Variability in the Characterization of Total Coliforms, Fecal Coliforms and Escherichia coli in Recreational Water Supplies of North Mississippi, USA
The fecal coliform, Escherichia coli, is a historical organism for the detection of fecal pollution in water supplies. The presence of E. coli indicates a potential contamination of the water supply by other more...
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Article
Application of a Redox Gradostat Reactor for Assessing Rhizosphere Microorganism Activity on Lambda-Cyhalothrin
Bacterial activity on pesticides can lead to decreased toxicity or persistence in aquatic systems. Rhizosphere activity is difficult to measure in situ. To mimic rhizosphere properties of the soft rush, Juncus e...
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Article
Effect of Storage Method and Associated Holding Time on Nitrogen and Phosphorus Concentrations in Surface Water Samples
Assessments were conducted to determine the effect of sample storage method and associated holding time on surface water nutrient concentrations from field sites. Six surface water sites and two nutrient spike...
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Article
Potential for Phosphate Mitigation from Agricultural Runoff by Three Aquatic Macrophytes
Phosphate from agricultural runoff is a major contributor to eutrophication in aquatic systems. Vegetated drainage ditches lining agricultural fields have been investigated for their potential to mitigate runo...
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Article
Phytotoxicity of Atrazine, S-Metolachlor, and Permethrin to Typha latifolia (Linneaus) Germination and Seedling Growth
Phytotoxicity assessments were performed to compare responses of Typha latifolia (L.) seeds to atrazine (only) and atrazine + S-metolachlor exposure concentrations of 0.03, 0.3, 3, and 30 mg L−1, as well as perme...
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Article
Effects of Fluidized Gas Desulfurization (FGD) Gypsum on Non-Target Freshwater and Sediment Dwelling Organisms
Fluidized gas desulfurization gypsum is a popular agricultural soil amendment used to increase calcium and sulfur contents, and reduce aluminum toxicity. Due to its surface application in conservation tillage ...
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Article
Evaluating Plant Species-Specific Contributions to Nutrient Mitigation in Drainage Ditch Mesocosms
Eutrophication of surface water bodies is a worldwide concern. In the USA alone, excessive nutrients are blamed for nearly 5,700 impairments of surface water bodies. Innovative measures, such as maximizing dra...
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Article
Effect of Three Insecticides and Two Herbicides on Rice (Oryza sativa) Seedling Germination and Growth
Rice (Oryza sativa L.) is one of the most important food crops worldwide. However, it is also a valuable tool in assessing toxicity of organic and inorganic compounds. For more than 20 years, it has been an appro...
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Article
Ability of Four Emergent Macrophytes to Remediate Permethrin in Mesocosm Experiments
Increased focus is being placed on the ability of native vegetation to mitigate potential harmful effects of agricultural runoff, especially pyrethroid insecticides. Replicate 379 L Rubbermaid tubs (1.25 m [l]...
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Article
Diazinon Accumulation and Dissipation in Oryza sativa L. Following Simulated Agricultural Runoff Amendment in Flooded Rice Paddies
Flooded post-harvest rice paddies were examined as systems for reducing diazinon (organophosphate insecticide) concentrations in stormwater runoff. Two paddies were cultivated in Oryza sativa L. and amended with ...
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Article
Mississippi Oxbow Lake Sediment Quality During an Artificial Flood
Surface sediment quality was assessed during a 35-day artificial flood in a shallow (<1.5 m) oxbow lake along the Coldwater River, Mississippi, using Hyalella azteca 28-day bioassays. Seventeen pesticides were mo...
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Article
Considerations for Assessments of Wadable Drainage Systems in the Agriculturally Dominated Deltas of Arkansas and Mississippi
The watershed approach, currently used to assess regional streams in the United States, emphasizes least-disturbed reference conditions. Consideration of extensive wadable drainage systems found in Arkansas an...
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Article
Assessing Caffeine as an Emerging Environmental Concern Using Conventional Approaches
Organic wastewater contaminants, including pharmaceuticals, caffeine, and nicotine, have received increased scrutiny because of their detection in water bodies receiving wastewater discharge. Despite recent me...
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Article
Diazinon Mitigation in Constructed Wetlands: Influence of Vegetation
In intensively cultivated areas, agriculture is a significant source of pesticides associated with storm runoff. When these pollutants enter aquatic receiving waters, they have potential to damage nearby aquat...
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Article
Assessment of Diazinon Toxicity in Sediment and Water of Constructed Wetlands Using Deployed Corbicula fluminea and Laboratory Testing
Constructed wetlands for mitigation of nonpoint agricultural runoff have been assessed for their ability to decrease potential toxicity from associated contaminants. After a simulated runoff event, constructed...
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Article
Toxicity Assessment of Diazinon in a Constructed Wetland Using Hyalella azteca
The goal of this study was to examine the use of a constructed wetland to mitigate the ecological impacts of simulated diazinon runoff from agricultural fields into receiving waters, via 48 h aqueous and sedim...
