Laura L McConnell

Summary

Affiliation: Agricultural Research Service
Country: USA

Publications

  1. ncbi request reprint Atmospheric deposition of pesticides to an agricultural watershed of the Chesapeake Bay
    Zhihua Kuang
    Department of Civil and Environmental Engineering, University of Maryland, College Park, MD 20742, USA
    J Environ Qual 32:1611-22. 2003
  2. ncbi request reprint Agricultural pesticides and selected degradation products in five tidal regions and the main stem of Chesapeake Bay, USA
    Laura L McConnell
    US Department of Agriculture, Agricultural Research Service, Environmental Management and Byproduct Utilization Laboratory, Beltsville, MD 20705, USA
    Environ Toxicol Chem 26:2567-78. 2007
  3. ncbi request reprint Evaluation of vegetable production management practices to reduce the ecological risk of pesticides
    Pamela J Rice
    U S Department of Agriculture, Agricultural Research Service, 1991 Upper Buford Circle, St Paul, Minnesota 55108, USA
    Environ Toxicol Chem 26:2455-64. 2007
  4. ncbi request reprint Reducing insecticide and fungicide loads in runoff from plastic mulch with vegetative-covered furrows
    Pamela J Rice
    Agricultural Research Service, U S Department of Agriculture, 1991 Upper Buford Circle, St Paul, MN 55108, USA
    J Agric Food Chem 55:1377-84. 2007
  5. ncbi request reprint Use of vegetative furrows to mitigate copper loads and soil loss in runoff from polyethylene (plastic) mulch vegetable production systems
    Pamela J Rice
    U S Department of Agriculture, Agricultural Research Service, Department of Soil Water and Climate, 1991 Upper Buford Circle, Room 439, St Paul, Minnesota 55108, USA
    Environ Toxicol Chem 23:719-25. 2004
  6. ncbi request reprint Pesticide occurrence in selected South Florida canals and Biscayne Bay during high agricultural activity
    Jennifer A Harman-Fetcho
    Environmental Quality Laboratory, Agricultural Research Service, U S Department of Agriculture, 10300 Baltimore Avenue, Beltsville, Maryland 20705, USA
    J Agric Food Chem 53:6040-8. 2005
  7. ncbi request reprint Current United States Department of Agriculture-Agricultural Research Service research on understanding agrochemical fate and transport to prevent and mitigate adverse environmental impacts
    Cathleen J Hapeman
    US Department of Agriculture, Agricultural Research Service, Environmental Quality Laboratory, 10300 Baltimore Ave, Bldg 007, BARC W, Beltsville, MD 20705, USA
    Pest Manag Sci 59:681-90. 2003
  8. doi request reprint Metolachlor metabolite (MESA) reveals agricultural nitrate-N fate and transport in Choptank River watershed
    Gregory W McCarty
    United States Department of Agriculture, Agricultural Research Service USDA ARS, Henry A Wallace Beltsville Agricultural Research Center, 10300 Baltimore Avenue, Beltsville, MD 20705, USA
    Sci Total Environ 473:473-82. 2014
  9. ncbi request reprint Measured concentrations of herbicides and model predictions of atrazine fate in the Patuxent River estuary
    Laura L McConnell
    USDA ARS, Environmental Quality Laboratory, Building 007, Room 225, Beltsville, MD 20705, USA
    J Environ Qual 33:594-604. 2004
  10. doi request reprint Temperature-dependent Raman spectroscopic evidence of and molecular mechanism for irreversible isomerization of β-endosulfan to α-endosulfan
    Walter F Schmidt
    Agricultural Research Service, United States Department of Agriculture, 10300 Baltimore Avenue, Beltsville, Maryland 20705 2325, United States
    J Agric Food Chem 62:2023-30. 2014

Collaborators

Detail Information

Publications23

  1. ncbi request reprint Atmospheric deposition of pesticides to an agricultural watershed of the Chesapeake Bay
    Zhihua Kuang
    Department of Civil and Environmental Engineering, University of Maryland, College Park, MD 20742, USA
    J Environ Qual 32:1611-22. 2003
    ..Estimates of herbicide flux presented here are probably a low estimate and actual rates may be significantly higher in areas closer to pesticide application...
  2. ncbi request reprint Agricultural pesticides and selected degradation products in five tidal regions and the main stem of Chesapeake Bay, USA
    Laura L McConnell
    US Department of Agriculture, Agricultural Research Service, Environmental Management and Byproduct Utilization Laboratory, Beltsville, MD 20705, USA
    Environ Toxicol Chem 26:2567-78. 2007
    ..In the two nonagricultural watersheds on the western shore, no gradient in herbicide concentrations was observed, indicating the pesticide source to these areas was water from the Bay main stem...
  3. ncbi request reprint Evaluation of vegetable production management practices to reduce the ecological risk of pesticides
    Pamela J Rice
    U S Department of Agriculture, Agricultural Research Service, 1991 Upper Buford Circle, St Paul, Minnesota 55108, USA
    Environ Toxicol Chem 26:2455-64. 2007
    ..In addition, the present study demonstrates the need to consider the management practice when assessing the potential risks and hazards for certain pesticides...
  4. ncbi request reprint Reducing insecticide and fungicide loads in runoff from plastic mulch with vegetative-covered furrows
    Pamela J Rice
    Agricultural Research Service, U S Department of Agriculture, 1991 Upper Buford Circle, St Paul, MN 55108, USA
    J Agric Food Chem 55:1377-84. 2007
    ..Results indicate that vegetative furrows are critical to minimizing the negative aspects of this management practice...
  5. ncbi request reprint Use of vegetative furrows to mitigate copper loads and soil loss in runoff from polyethylene (plastic) mulch vegetable production systems
    Pamela J Rice
    U S Department of Agriculture, Agricultural Research Service, Department of Soil Water and Climate, 1991 Upper Buford Circle, Room 439, St Paul, Minnesota 55108, USA
    Environ Toxicol Chem 23:719-25. 2004
    ..Replacing bare-soil furrows with vegetative furrows greatly reduces the effects of sediments and agrochemicals on sensitive ecosystems while maintaining crop yields...
  6. ncbi request reprint Pesticide occurrence in selected South Florida canals and Biscayne Bay during high agricultural activity
    Jennifer A Harman-Fetcho
    Environmental Quality Laboratory, Agricultural Research Service, U S Department of Agriculture, 10300 Baltimore Avenue, Beltsville, Maryland 20705, USA
    J Agric Food Chem 53:6040-8. 2005
    ..These data will also serve to document canal conditions prior to implementation of the Comprehensive Everglades Restoration Plan (CERP)...
  7. ncbi request reprint Current United States Department of Agriculture-Agricultural Research Service research on understanding agrochemical fate and transport to prevent and mitigate adverse environmental impacts
    Cathleen J Hapeman
    US Department of Agriculture, Agricultural Research Service, Environmental Quality Laboratory, 10300 Baltimore Ave, Bldg 007, BARC W, Beltsville, MD 20705, USA
    Pest Manag Sci 59:681-90. 2003
    ....
  8. doi request reprint Metolachlor metabolite (MESA) reveals agricultural nitrate-N fate and transport in Choptank River watershed
    Gregory W McCarty
    United States Department of Agriculture, Agricultural Research Service USDA ARS, Henry A Wallace Beltsville Agricultural Research Center, 10300 Baltimore Avenue, Beltsville, MD 20705, USA
    Sci Total Environ 473:473-82. 2014
    ..In poorly drained areas where denitrification can occur, wetland restoration and controlled drained structures that minimize ditch flow should be used to maximize denitrification...
  9. ncbi request reprint Measured concentrations of herbicides and model predictions of atrazine fate in the Patuxent River estuary
    Laura L McConnell
    USDA ARS, Environmental Quality Laboratory, Building 007, Room 225, Beltsville, MD 20705, USA
    J Environ Qual 33:594-604. 2004
    ..Atrazine persistence in the estuary is directly related to river flows into the estuary. Low flows will increase atrazine residence time in the upper estuary and increase degradation losses...
  10. doi request reprint Temperature-dependent Raman spectroscopic evidence of and molecular mechanism for irreversible isomerization of β-endosulfan to α-endosulfan
    Walter F Schmidt
    Agricultural Research Service, United States Department of Agriculture, 10300 Baltimore Avenue, Beltsville, Maryland 20705 2325, United States
    J Agric Food Chem 62:2023-30. 2014
    ..These movements cannot occur simultaneously nor symmetrically, precluding conversion of α-endosulfan to β-endosulfan. ..
  11. ncbi request reprint Comparison of copper levels in runoff from fresh-market vegetable production using polyethylene mulch or a vegetative mulch
    Pamela J Rice
    US Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Maryland 20705, USA
    Environ Toxicol Chem 21:24-30. 2002
    ....
  12. ncbi request reprint Performance of commercial nonmethane hydrocarbon analyzers in monitoring oxygenated volatile organic compounds emitted from animal feeding operations
    Steven Trabue
    U S Department of Agriculture, Agricultural Research Service, National Laboratory for Agriculture and the Environment, Ames, Iowa 50011, USA
    J Air Waste Manag Assoc 63:1163-72. 2013
    ..The PA-IR response was variable, but it was always lower than the GC/FID response. Results suggest that improved approaches are needed to accurately determine the VOC profile and NMHC emission rates from AFOs...
  13. ncbi request reprint Agrochemical and nutrient impacts on estuaries and other aquatic systems
    Cathleen J Hapeman
    Environmental Quality Laboratory, Agricultural Research Service, U S Department of Agriculture, 10300 Baltimore Avenue, Beltsville, Maryland 20705, USA
    J Agric Food Chem 50:4382-4. 2002
    ..The complexity and high visibility of estuarine ecosystem health will require continued examination to develop more effective agricultural and land management strategies and sound science-based regulations...
  14. ncbi request reprint Predicting perchlorate exposure in milk from concentrations in dairy feed
    Clifford P Rice
    Environmental Management and Byproduct Utilization Laboratory, USDA, Agricultural Research Service, Beltsville, Maryland 20715, USA
    J Agric Food Chem 55:8806-13. 2007
    ..The study suggests that reducing perchlorate concentration in dairy feed may reduce perchlorate concentrations in milk as well as the potential to reduce human exposure to perchlorate in milk...
  15. ncbi request reprint Identification of seasonal variations in volatile sulfur compound formation and release from the secondary treatment system at a large wastewater treatment plant
    Kweku Sekyiamah
    PBS and J, 12101 Indian Creek Court, Beltsville, MD 20770, USA
    Water Environ Res 80:2261-7. 2008
    ..81 (p < 0.001, df = 13)]. Results indicate that settled sludge in the anoxic environment of the secondary sedimentation basin is the most important contributor to the formation of VSCs in the activated sludge treatment system...
  16. ncbi request reprint Gas-phase analysis of trimethylamine, propionic and butyric acids, and sulfur compounds using solid-phase microextraction
    Hyunook Kim
    US Department of Agriculture, Agricultural Research Service, Animal Manure and Byproduct Laboratory, Beltsville, Maryland 20705, USA
    Anal Chem 74:1054-60. 2002
    ....
  17. ncbi request reprint Herbicide and insecticide loadings from the Susquehanna River to the northern Chesapeake Bay
    Bo Liu
    Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland 20742, USA
    J Agric Food Chem 50:4385-92. 2002
    ....
  18. ncbi request reprint Wet deposition of current use pesticides at a rural location on the Delmarva Peninsula: impact of rainfall patterns and agricultural activity
    Anubha Goel
    Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland 20742, USA
    J Agric Food Chem 53:7915-24. 2005
    ..Total pesticide flux ranged from 90 microg/m2 (2001) to 180 microg/m2 (2000). Wet deposition can account for up to 10-20% of the annual loadings of pesticides to the Bay...
  19. ncbi request reprint Determination of vapor pressure-temperature relationships of current-use pesticides and transformation products
    Anubha Goel
    Dept of Civil and Environmental Engineering, University of Maryland, College Park, Maryland, USA
    J Environ Sci Health B 42:343-9. 2007
    ..7 x 10(-7) Pa). The availability of vapor pressure temperature relationships for these chemicals will aid in pesticide risk assessment development and improve the effectiveness of mitigation and remediation efforts...
  20. ncbi request reprint Spray irrigation of treated municipal wastewater as a potential source of atmospheric PBDEs
    Anubha Goel
    Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland 20742, USA
    Environ Sci Technol 40:2142-8. 2006
    ..Temporal trends indicate that aerial concentrations of PBDEs in this area are increasing at an exponential rate; the atmospheric doubling times for the different congeners range from 1.1 to 1.7 yrs...
  21. ncbi request reprint Prediction of dimethyl disulfide levels from biosolids using statistical modeling
    Steven A Gabriel
    Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland 20742, USA
    J Environ Sci Health A Tox Hazard Subst Environ Eng 40:2009-25. 2005
    ..Using the developed models, plant operators can adjust the controllable variables to proactively decrease this odorant. Therefore, these models are a useful tool in biosolids management at WWTPs...
  22. ncbi request reprint Pesticides in mountain yellow-legged frogs (Rana muscosa) from the Sierra Nevada Mountains of California, USA
    Gary M Fellers
    Western Ecological Research Center, US Geological Survey, Point Reyes National Seashore, Point Reyes, California 94956, USA
    Environ Toxicol Chem 23:2170-7. 2004
    ..Organophosphate insecticides, chlorpyrifos, and diazinon were observed primarily in surface water with higher concentrations at the Tablelands sites. No contaminants were significantly higher in our Sixty Lakes samples...
  23. ncbi request reprint Solar radiation, relative humidity, and soil water effects on metolachlor volatilization
    John H Prueger
    USDA ARS National Soil Tilth Laboratory, Ames, Iowa 50010, USA
    Environ Sci Technol 39:5219-26. 2005
    ..The results suggest that metolachlor volatilization is influenced by multiple factors involving meteorological, surface soil, and chemical factors...