William S. Curran, Ph.D.

William S. Curran, Ph.D.

  • Emeritus Professor of Weed Science and Extension Weed Specialist

Areas of Expertise

  • Managing weedy plants in agroecosystems
  • Conservation tillage and cover crops
  • Herbicide use
  • Integrated weed management
  • Weed management in organic cropping systems

Education

  • Ph.D., Agronomy/Weed Science, University of Illinois, 1990
  • M.S., Agronomy/Weed Science, Washington State University, 1985
  • B.S., Agronomy, Colorado State University, 1982

Responsibilities and Interests

Dr. Curran is an Emeritus Professor since 2018 in the Department of Plant Science and has been a member of the Penn State faculty since 1990.  Bill had an extension – research split and had statewide responsibilities for weed management education in agronomic crops.  Bill's extension program focused on providing ag constituents with the latest weed management information.  Dr. Curran conducted research on weed biology and ecology, integrated weed management, weed management in conservation tillage systems including managing cover crops and opportunities for managing weeds in organic crop production systems.  Bill's extension program was very much tied to his applied research program.  Dr. Curran remains active in several scientific societies and was the 2020/2021 President of the Weed Science Society of America (WSSA), the principal international scientific organization that promotes integrated research and education for  the management of weedy plants in agricultural and natural ecosystems in North America. He is the former President and member of the governing board for the Northeastern Weed Science Society (NEWSS).  Dr. Curran was an Associate Editor for Weed Technology and has served as a reviewer for Weed Science, Weed Technology, Agronomy Journal as well as a number of other journals.  Dr. Curran regularly served on USDA grant panel review teams and was the Pennsylvania representative to USDA NE Region SARE.  Bill relocated to the Bozeman, MT area in 2018 and is still active in weed management activities regionally and locally. He is an Affiliate Professor in the Department of Land Resources and Environmental Sciences (LRES) at Montana State University.

Appointment

  • 75% Extension
  • 25% Research

Links

Professional Background

  • 2018, Emeritus Professor of Weed Science.
  • 1990–2017, Assistant/Associate/Full Professor of Agronomy and Weed Science, Department of Crop and Soil Sciences, Penn State, University Park.
  • 1986–1990, Extension Agronomist, Department of Agronomy, University of Illinois, Urbana-Champaign.

Selected Publications

Extension

  1. Ackroyd, V., T. Besancon, J. Bunchek, C. Cahoon, R. Chandran, W. Curran, M. Flessner, A. Klodd, D. Lingenfelter, S. Mirsky, M. Ryan, D. Sandy, M. VanGessel, K. Vollmer, M. Ward.  2019. A Practical Guide for Integrated Weed Management in Mid-Atlantic Grain Crops.  Northeastern IPM Center and USDA NIFA.  https://growiwm.org/wp-content/uploads/2019/10/IWMguide.pdf?x71059.
  2. Cahoon, C., R. Chandran, W. Curran, M. Flessner, T. Hines Q. Johnson D. Lingenfelter, B. Schulz and M. VanGessel.  2018.  2018 Mid-Atlantic Field Crop Weed Management Guide. Penn State University College of Ag. Sciences.  (http://extension.psu.edu/publications/agrs136).
  3. Curran, W., D. Lingenfelter, M. Ryan, D. Sandy, M. Dempsey, and B. Crockett.  2015.  Weed Management, In Penn State Organic Production Guide.  Penn State College of Agric. Sci., University Park. (http://pubs.cas.psu.edu/freepubs/pdfs/agrs124.pdf).
  4. Curran, W.S., D.D. Lingenfelter, J.F. Tooker, and A.A. Collins.  2015.  Field crop pest management (corn, sorghum, soybean, small grains, and forages).  In the 2015-2016 Agronomy Guide (revised).  Penn State College of Agric. Sci., University Park. (http://extension.psu.edu/agronomy-guide).
  5. Curran, W. S, D. D. Lingenfelter, and J.F. Tooker.  2013.  Field crop pest management (corn, sorghum, soybean, small grain and forages). In The 2013-2014 Agronomy Guide (revised). Penn State College of Agric. Sci., University Park. (http://extension.psu.edu/agronomy-guide).
  6. Lingenfelter, D.D. and W.S. Curran. 2012. What's New for agronomic weed control in 2012. Dept. Plant Sci., Penn State Univ., University Park.
  7. Barbercheck, M.E., W.S. Curran, and J.M. Dillon.  2013.  Organic crop production.  In The 2013-2014 Agronomy Guide, pp. 133-141 (revised). Penn State College of Agric. Sci., University Park. (http://pubs.cas.psu.edu/FreePubs/PDFs/agrs026.pdf)
  8. Curran, W.S., and M.R. Ryan, S.B. Mirsky. 2010. Cover crop rollers for northeastern grain production (http://www.weeds.psu.edu/pdf/roller.pdf).
  9. Ryan, MR, DA Mortensen, and WS Curran. 2010. Weed management tactics in organic no-till. http://agsci.psu.edu/susag/newsletter/august09/4organicnotill.
  10. Nord, E., R. Smith, W. Curran, and M. Ryan. 2010. Suppressing weeds using cover crops in PA. Four page color bulletin as a part of the new series titled Agroecology in Practice.
  11. Curran, W.S., D.D. Lingenfelter, D.D. Clavin, and J.F. Tooker. 2009. Field crop pest management. In The 2009–2010 Agronomy Guide (revised). Penn State College of Agric. Sci., University Park.
  12. Duiker, S. and W.S. Curran. 2007. Management of red clover as a cover crop, Agronomy Facts 67, Penn State College of Agric. Sci., Univ. Park, PA.
  13. Lingenfelter, D. and W.S. Curran. 2007. Weed management in CREP grasslands, Agronomy Facts 66, Penn State College of Agric. Sci., Univ. Park, PA.
  14. Dillehay, B. L. and W.S. Curran. 2006. Guidelines for weed management in roundup ready alfalfa, Agronomy Facts 65. Penn State College of Agric. Sci., Univ. Park, PA
  15. Curran, W.S. 2004. Weed management in organic cropping systems, Agronomy Facts 64. Penn State College of Agric. Sci., Univ. Park, PA
  16. Lingenfelter, D. and W. S. Curran. 2001. Wirestem muhly management in agronomic crops, Agronomy Facts 61, Penn State College of Agric. Sci., Univ. Park, PA.
  17. Curran, W.S. 2001. Weed management in pasture systems, Agronomy Facts 62. Penn State College of Agric. Sci., Univ. Park, PA
  18. Curran, W.S., J. Harper, and D.D. Lingenfelter. 2000. Herbicide resistant crops in 2000, Penn State College of Agric. Sci., Univ. Park.
  19. Curran, W. S and D. D. Lingenfelter. 2000. Field crop weed control guide. Penn State College of Agric. Sci., Univ. Park, PA., 92 pages.
  20. Curran, W. S. M.D. McGlamery, R. A. Liebl, and D. D. Lingenfelter. 1999. Adjuvants for enhancing herbicide performance, Agronomy Facts 37, Penn State College of Agric. Sci., Univ. Park, PA
  21. Curran, W. S. 1999. Management of shattercane and johnsongrass; an integrated approach, Agronomy Facts 4, Penn State College of Agric. Sci., Univ. Park, PA.
  22. Curran, W. S. 1999. Management of triazine-resistant lambsquarters and pigweed, an integrated approach, Agronomy Facts 10. Penn State College of Agric. Sci., Univ. Park, PA.
  23. Curran, W. S. 1998. Persistence of herbicides in soil, Agronomy Facts 36, Penn State College of Agric. Sci., Univ. Park, PA.
  24. Werner, E. L., W. S. Curran and D. D. Lingenfelter. 1998. Management of eastern black nightshade in agronomic crops, an integrated approach. Agronomy Facts 58, Penn State College of Agric. Sci., Univ. Park, PA.
  25. Messersmith, D., W. S. Curran, and D. D. Lingenfelter. 1997. Managing burcucumber in agronomic crops. Agronomy Facts 59, Penn State College of Agric. Sci., Univ. Park, PA.
  26. Curran, W. S., D. D. Lingenfelter, and L. Garling. 1996. Weed management in conservation tillage. Conservation tillage fact sheet series, Penn State College of Agric. Sci., Univ. Park, PA.
  27. Curran, W. S., D. D. Lingenfelter, L. Garling, and P. Wagoner. 1996. Cover crops for conservation tillage. Conservation tillage fact sheet series, Penn State College of Agric. Sci., Univ. Park, PA.
  28. Gunsolus, J. and W. S. Curran. 1996. Herbicide mode of action and injury symptoms (revised). North Centr. Reg. Ext. Publ. No. 377.

Research

  1. Schwartz-Lazaro, L., L. Shergill, J. Evans, M. Bagavathiannan, S. Beam, M. Bish, J. Bond, K. Bradley, W.S. Curran, A. Davis, W. Everman, M. Flessner, S. Haring, N. Jordan, N. Korres, J. Lindquist, J. Norsworthy, T. Sanders, L. Steckel, M. VanGessel, B. Young, and S. Mirsky. Seed-shattering phenology at soybean harvest of economically important weeds in multiple regions of the United States.  Part 3: Drivers of seed shatter.  Weed Sci. (In Press).

  2. Wallace JM, Barbercheck ME, Curran W, Keene CL, Mirsky SB, Ryan M, VanGessel MJ (2021). Cover crop-based, rotational no-till (CCORNT) management tactics influence crop performance in organic transition within the Mid-Atlantic US. Agronomy Journal, in press.

  3. Champagne RJ, Wallace JM, Curran WS, Barbercheck ME (2021) Rotational no-till and tillage-based organic corn produce management tradeoffs in the Northeast. Agronomy Journal. https://doi.org/10.1002/agj2.20823

  4. Summers, H., H.D. Karsten, W.S. Curran, and G.M. Malcom.  2021.  Integrated weed management with reduced herbicides in a no-till diary rotation.  Agron J. https://doi.org/10.1002/agj2.20757.

  5. Baraibar, B., White, C.M.; Hunter, M.C., Finney, D.M.; Barbercheck, M.E.; Kaye, J.P.;
    Curran, W.S.; Bunchek, J.; Mortensen, D.A. Weeds in Cover Crops: Context and Management Considerations. Agriculture 2021, 11, 193. https://doi.org/10.3390/ agriculture11030193
  6. Schwartz-Lazaro, L.M., L.S. Shergill, J.A. Evans, M.V. Bagavathiannan, S.C. Beam, B.D. Bish, J.A. Bond, K.W. Bradley, W.S. Curran, A.S. Davis, W.J. Everman, M.L. Flessner, S.C. Harring, N.R. Jordan, N.E. Korres, J.L. Lindquist, J.K. Norsworthy, T.L. Sanders, L.E. Steckel, M.J. VanGessel, B. Young, and S.B. Mirsky.  2021. Seed shattering phenology at soybean harvest of economically important weeds in multiple regions of the United States.  Part 1: broadleaf species.  Weed Sci.  DOI: https://doi.org/10.1017/wsc.2020.80
  7. Schwartz-Lazaro, L.M., L.S. Shergill, J.A. Evans, M.V. Bagavathiannan, S.C. Beam, B.D. Bish, J.A. Bond, K.W. Bradley, W.S. Curran, A.S. Davis, W.J. Everman, M.L. Flessner, S.C. Harring, N.R. Jordan, N.E. Korres, J.L. Lindquist, J.K. Norsworthy, T.L. Sanders, L.E. Steckel, M.J. VanGessel, B. Young, and S.B. Mirsky.  2021. Seed shattering phenology at soybean harvest of economically important weeds in multiple regions of the United States.  Part 2: grass species.  Weed Sci.  DOI: https://doi.org/10.1017/wsc.2020.79
  8. Bunchek, J.M., J.M. Wallace, W.S. Curran, D.A. Mortensen, M.J. VanGessel, and B.A. Scott.  2020.  Alternative performance targets for integrating cover crops as a proactive herbicide-resistance management tool.  Weed Sci. 68: 534-544. DOI: 10.1017/wsc.2020.49.
  9. Moore, V.M., J.E. Maul, D. Wilson, W.S. Curran, D.C. Brainard, T.E. Devine, S.B. Mirsky. 2020.  Registration of “Purple Bounty" and “Purple Prosperity" hairy vetch. J. Plant Registrations 14:340-346 (doi.org/10.1002/plr2.20044).
  10. Wallace, J., S. Isbell, R. Hoover, M. Barbercheck, J. Kaye, & W. Curran.  2020. Drill and broadcast establishment methods influence interseeded cover crop performance in organic corn. Renewable Agriculture and Food Systems, 1-9. doi:10.1017/S174217052000006X.
  11. Champagne, R.J., J.W. Wallace, W.S. Curran, and B. Baraibar.  2019.  Agronomic and economic tradeoffs between alternative cover crop and organic soybean sequences.  Renewable Agriculture and Food Systems, 1-9. doi:10.1017/S1742170519000437.
  12. Reed, H.K., H.D. Karsten, W.S. Curran, J.F. Tooker, and S.W. Duiker.  Planting green effects on corn and soybean Production.  2019.  Agron. J. 111: 2314-2315.
  13. Caswell, K., J. Wallace, W. Curran, S. Mirsky, and M. Ryan.  2019.  Cover crop species and cultivars for drill interseeding in the Mid-Atlantic corn and soybean.  Agron. J. 111: 1060-1067.
  14. Wallace J., W. Curran, and D. Mortensen. 2019. Cover crop effects on horseweed (Conyza canadensis) density and size inequality at the time of herbicide exposure.  Weed Sci. 67: 327338.
  15. Parker, E.T., M.D.K. Owen, M.L. Bernards, W.S. Curran, L.E. Steckel, and T.C. Mueller.  2018. A comparison of symmetrical and asymmetrical triazine herbicides for enhanced degradation in three midwestern soils.  Weed Sci. 66:673-679.
  16. Baraibar, B., D. Mortensen, M. Hunter, M. Barbercheck, J. Kaye, D. Finney, W. Curran, J. Bunchek, C. White.  2018.  Growing degree days and cover crop type explain weed biomass in winter cover crops.  Agron. Sust. Dev. 38:6 DOI: 10.1007/s13593-018-0543-1
  17. Schroeder, J., M. Barrett, D. Shaw, A. Asmus, H. Coble, D. Ervin, R. Jussaume, M. Owen, I. Burke, C. Creech, A.S. Culpepper, W.S. Curran, D. Dodds, T. Gaines, J. Gunsolus, B. Hanson, P. Jha, A. Klodd, A. Kniss, R. Leon, S. McDonald, D. Morishita, B. Schutte, C. Sprague, P. Stahlman, L Steckel, M. VanGessel.   2018.  Managing wicked herbicide-resistance:  lessons from the field.  Weed Technol. 32: 475-488.
  18. Schroeder, J., M. Barrett, D. Shaw, A. Asmus, H. Coble, D. Ervin, R. Jussaume, M. Owen, I. Burke, C. Creech, A.S. Culpepper, W.S. Curran, D. Dodds, T. Gaines, J. Gunsolus, B. Hanson, P. Jha, A. Klodd, A. Kniss, R. Leon, S. McDonald, D. Morishita, B. Schutte, C. Sprague, P. Stahlman, L Steckel, M. VanGessel.   2018.  Managing herbicide resistance: listening to the perspective of practitioners. Procedures for conducting listening sessions and an evaluation of the process.  Weed Techol. 32: 489-497.
  19. Youngerman, C., A. DiTommaso, W.S. Curran, S. Mirsky, and M. Ryan.  2018. Corn density effect on interseeded cover crops, weeds, and grain yield.  Agron. J. 110:2478-2487.
  20. Curran, W.S, R.J. Hoover, S.B. Mirsky, G.W. Roth, M.R. Ryan, V.J. Ackroyd, J.M Wallace, M.A. Dempsey and C.J. Pelzer. 2018. Evaluation of cover crops interseeded into corn (Zea mays L.) across the Mid-Atlantic region. Agron. J. 110:435-443.
  21. Wallace, J.M., C.L. Keene, W. Curran, S. Mirsky, M.R. Ryan, and M.J. VanGessel.  2018. Integrated weed management strategies in cover crop-based, organic rotational no-till corn and soybean in the Mid-Atlantic region.  Weed Sci. 66:94-108. https://doi.org/10.1017/wsc.2017.53
  22. Wallace, J.M., W.S. Curran, S.B. Mirsky, and M.R. Ryan.  2017. Tolerance of Interseeded Annual Ryegrass and Red Clover Cover Crop to Residual Herbicides in Mid-Atlantic Corn Cropping Systems. Weed Technol. https://doi.org/10.1017/wet.2017.48
  23. Wallace, J.M., A. Williams, J.A. Liebert, V.J. Ackroyd, R.A. Vann, W.S. Curran, C.L. Keene, M.J. VanGessel, M.R. Ryan, and S.B. Mirksy.  2017. Organic rotational no-till corn and soybean production systems in the mid-Atlantic United States.  Agriculture 2017, 7(4), 34; doi:10.3390/agriculture7040034
  24. Mueller, T.C., E.T. Parker, L. Steckel, S.A. Clay, M.D.K. Owen, W.S. Curran, R. Currie, R. Scott, C. Sprague, D.O. Stephenson, D.K. Miller, E.P. Prostko, W.J. Grihar, J. Martin, L.J. Kruz, K. Bradley, M.L. Bernards, P. Dotray, S. Knezevic, V. Davis, and R. Klein.  2017. Enhanced atrazine degradation is widespread across the United States.  Pest Management Science DOI: 10.1002/ps.4566.
  25. Mirsky, S.B., V.J. Ackroyd, S. Cordeau, W. Curran, M. Hashemi, C.S. Reberg-Horton, M. Ryan, and J. T. Spargo. 2017.  Hairy vetch biomass across the eastern US: effects of latitude, seeding rate and date, and termination timing.  Agron. J. 109 (doi:10.2134/agronj2016.09.0556).
  26. Mirsky, S.B., J.T. Spargo, W.S. Curran, C.S. Reberg-Horton, M. Ryan, H.H. Schomberg, V.J. Ackroyd.  2017.  Characterizing cereal rye biomass and allometric relationships across a range of fall available N Rates in the eastern US.  Agron. J. 109 (doi:10.2134/agronj2016.09.0557).
  27. Keene, C.L., W.S. Curran, J.M. Wallace, M.R. Ryan, S.B. Mirksy, M.J. VanGessel, and M.E. Barbercheck.  2017.  Cover crop termination is critical in organic rotational no-till systems.  Agron J. 109: 1: 272-282.
  28. Menalled, F., R. Peterson, R. Smith, W. Curran, D. Paez, and B. Maxwell.  2016.  The eco-evolutionary imperative: revisiting weed management in the midst of an herbicide resistance crisis. Sustainability 8(12), 1297; doi:10.3390/su8121297
  29. Patches, K.M., W.S. Curran, and D.D. Lingenfelter.  2016.  Effectiveness of herbicides for control of common pokeweed (Phytolacca americana L.) in corn and soybean. Weed Technol. 31(2):193-201.
  30. Keene, C.L. and W.S. Curran.  2016.  Optimizing high-residue cultivation timing and frequency in reduced-tillage soybean and corn.  Agron. J. 108:1987-1906.
  31. Snyder, E.M., H.D. Karsten, W.S. Curran, G.M. Malcolm, and J.A. Hyde.  2016. Green Manure comparison between winter wheat and corn: weeds, yields, and economics.  Agron. J. 108: 2015-2025.
  32. Snyder, E.M., W.S Curran, H.D. Karsten, G.M. Malcolm, S.W. Duiker, and J.A. Hyde.  2016.  Assessment of an integrated weed management system in no-till soybean and corn.  Weed Sci. 64:712-726.
  33. Curran, W.S, J.M. Wallace, S.B. Mirksy, and B.C. Crockett. 2015. Effectiveness of herbicides for control of hairy vetch (Vicia villosa) in winter wheat.  Weed Technol. 29:509-518.

  34. Mirsky, S.B., J.W. Wallace, W.S. Curran, and B.C. Crockett. 2015. Hairy vetch seedbank persistence and implications for cover crop management.  Agron. J. 107:2391-2400.

  35. Ward, M.J., M.R. Ryan, W.S. Curran, and J. Law.  2014. Giant foxtail seed predation by Harpalus pensylvanicus (Coleoptera: Carabidae).  Weed Sci. 62:555-562.
  36. Mirsky, S.B., M.R. Ryan, J.R. Teasdale, W.S. Curran, C.S. Reberg-Horton, J.T. Spargo, M.S. Wells, C.L. Keene, and J.W. Moyer. 2013.  Overcoming weed management challenges in cover crop-based organic rotational no-till soybean production in the eastern United States. Weed Technol 27:193-203.
  37. Brainard, D.C., W.S. Curran, R.R. Bellinder, M. Ngouajio, M.J. VanGessel, M.J. Haar, W.T. Lanini, and J.B. Masiunas.  2013. Temperature and relative humidity affect weed response to vinegar and clove oil.  Weed Technol 27:156-164.
  38. Nord, E.A., M.R. Ryan, W.S. Curran, D.A. Mortensen, and S.B. Mirsky.  2012. Weed emergence periodicity mediates interactions between management systems and planting date in no-till planted soybean. Weed Sci. 60:624-633.
  39. Bates, R.T., R.S. Gallagher, W.S. Curran, and J.K. Harper.  2012.  Integrating mechanical and reduced chemical weed control in conservation tillage corn.  2012.  Agron J. 104:507-517.
  40. Curran, W.S., M.R. Ryan, M.W. Myers, and P. Adler. Effects of seeding date and weed control on switchgrass establishment. 2012.  Weed Technol. 26:248-255.
  41. Mirsky, S.B., M.R. Ryan, W.S. Curran, J.R. Teasdale, J. Maul, J.T. Spargo, J. Moyer, A.M. Grantham, D. Weber, and T. Way. 2012.  Tillage issues: cover crop-based organic rotational no-till grain production in the Mid-Atlantic region. Renewable Agric. and Food Sys. 27:31-40.
  42. Ryan, M.R., W.S. Curran, A.M. Grantham, L.K, Hunsberger, S.B. Mirsky, D.A. Mortensen, E.A. Nord, and D.O. Wilson.  2011.  Effects of seeding rate and poultry litter on weed suppression from a rolled cereal rye cover crop.   Weed Sci. 59: 438-444.
  43. Curran, W.S., M.R. Ryan, M.W. Myers, and P. Adler. 2011. Effectiveness of sulfosulfuron and quinclorac for weed control during switchgrass (Panicum virgatum) establishment. Weed Technol. 25:598-603.
  44. Mirsky, S.B., W.S. Curran, D.M. Mortensen, D.L. Shumway, and M.R. Ryan. 2011. Timing of cover crop management effects on weed suppression in no-till planted soybean using a roller-crimper. Weed Sci. 59:380-389.
  45. Nord, E.A., W.S. Curran, D.A. Mortensen, S.B. Mirsky, and B.P. Jones. 2011. Integrating multiple tactics for managing weeds in high residue no-till soybean. Agron. J.  103:1542-1551.
  46. Ryan, M.R., S. B. Mirsky, D.A. Mortensen, J.R. Teasdale, and W.S. Curran.  2011.  Potential synergistic effects of cereal rye biomass and soybean planting density on weed suppression.  Weed Sci. 59:238-246.
  47. Smith, R.G., T. Gareau, D. Mortensen, W. Curran, and M. Barbercheck.  2011.  Assessing and visualizing agricultural management practices: a multivariable hands-on approach for education and extension.  Weed Technol. 25:680-687.
  48. Dillehay, B.L., W.S. Curran, D.A. Mortensen. 2011. Critical period of weed control in alfalfa. Weed Sci. 59:598-603.
  49. Ward, M.J., M.R. Ryan, W.S. Curran, M.E. Barbercheck, and D.A. Mortensen. 2011. Cover crops and disturbance influence activity-density of weed seed predators. Weed Sci. 59:76-81.
  50. Dillehay, B.L. and W.S. Curran. 2010. Comparison of herbicide programs for weed control in glyphosate-resistant alfalfa. Weed Technol. 24:130–138.
  51. Mirsky, S.B., E.R. Gallandt, D.A. Mortensen, W.S. Curran, and D.L. Shumway. 2010. Reducing the germinable weed seedbank with sil disturbance and cover crops. Weed Research 50:341–352.
  52. Mischler, R.A., S.W. Duiker, W.S. Curran, and D. Wilson. 2010. Hairy vetch management for no-till organic corn production. Agron. J. 102: 355–362.
  53. Mischler, R.A., W.S. Curran, S.W. Duiker, and J. Hyde. 2010. Rolling a rye cover crop for weed suppression in no-till soybeans. Weed Technol. 24:253–261.
  54. Ryan, M.R., D.A. Mortensen, L. Bastiaans, J.R. Teasdale, W.S. Curran, R. Seidel, P.R. Hepperly, and D.O. Wilson. 2009. Elucidating the apparent maize tolerance to weed competition in long-term organically managed systems. Weed Research 50:25–36.
  55. Ryan, M.R., R.G. Smith, D.A. Mortensen, R. Seidel, J.R. Teasdale, W.S. Curran, and D. Shumway. 2009. Weed-crop competition relationships differ between organic and conventional cropping systems. Weed Research 49:572–580.
  56. Mirsky, S.B., W.S. Curran, D.A. Mortensen, M.R. Ryan, and D.L. Shumway. 2009. Control of cereal rye with a roller/crimper as influenced by cover crop phenology. Agron. J. 101:1589–1596.
  57. Dillehay, B.L., W.S. Curran, and M.H. Hall. 2009. Potential for Delayed Orchardgrass Seeding during Glyphosate-Resistant Alfalfa Establishment. Agron. J. 101: 1108–1112.
  58. Lingenfelter, D.D. and W.S. Curran. 2007. Effect of glyphosate and several ACCase-inhibitor herbicides on wirestem muhly (Muhlenbergia frondosa) control. Weed Technol. 21:732–738.
  59. Byers, R.A., W. S. Curran, B. W. Pennypacker, and B. A. Khan. 2006. Invertebrate pests, weeds, and diseases of forage-livestock systems, Chapt. 9. In E. Rayburn (ed.), Pasture-Based Livestock Production, NRAES-135. (contributing senior author).
  60. Duiker, S.W. and W.S. Curran 2005. Rye Cover Crop Management for Corn Production in the Northern Mid-Atlantic Region. Agron. J. 2005 97: 1413–1418.
  61. Myers, M.W., W. S. Curran, M. J. VanGessel, B. A. Majek, D. A. Mortensen, D. D. Calvin, H. D. Karsten, and G. W. Roth. 2005. Effect of soil disturbance on annual weed emergence in the northeastern United States. Weed Technol. 19:274–282.
  62. Sanderson, M.A., R.R. Schnabel, W.S. Curran, W.L. Stout, D. Genito, and B.F. Tracy 2004. Switchgrass and big bluestem hay, biomass, and seed yield response to fire and glyphosate treatment. Agron. J. 96: 1688–1692.
  63. Werner, E.L., W.S. Curran, J.K. Harper, G.W. Roth and D.P. Knievel. 2004. Velvetleaf (Abutilon theophrasti) interference and seed production in corn silage and grain. Weed Technology 18 (3): 779–783.
  64. Gower, S. A. M. M. Loux, J. Cardina, S. K. Harrison, P. L. Sprankle, N. J. Probst, T. T. Bauman, W. Bugg, W. S. Curran, R. S. Currie, R. G. Harvey, W. G. Johnson, J. J. Kells, M. D. K. Owen, D. L. Regehr, C. H. Slack, M. Spaur, C. L. Sprague, M. Vangessel, and B. G. Young. 2003. Effect of postemergence glyphosate application timing on weed control and grain yield in glyphosate-resistant corn: results of a 2-yr multistate study. Weed Technol. 17: 821–828.
  65. Myers, M.W., W.S. Curran, M. J. Vangessel, D.D. Calvin, D.A. Mortensen, B.A. Majek, H.D. Karsten, and G. W. Roth. 2004. The effect of weed density and application timing on weed control and corn (Zea mays) grain yield. Weed Science 52:913–919.
  66. Myers, M.W., W. S. Curran, M. J. VanGessel, D. D. Calvin, D. A. Mortensen, B. A. Majek, H. D. Karsten, and G. W. Roth. 2004. Predicting Weed Emergence for Eight Annual Species in the Northeastern United States. Weed Sci. 52:913-919.
  67. Esbenshade, W.R., W. S. Curran, G. W. Roth, N. L. Hartwig, And M. D. Orzolek. 2001. Effect of tillage, row spacing, and herbicide on the emergence and control of burcucumber (Sicyos angulatus) in soybean (Glycine max). Weed Technol. 15:229–235. Abstract.
  68. Esbenshade, W.R., W. S. Curran, G. W. Roth, N. L. Hartwig, And M. D. Orzolek. 2001. Effect of row spacing and herbicides on burcucumber (Sicyos angulatus) control in herbicide resistant corn (Zea mays). Weed Technol. 15: 348–354. Abstract.
  69. Esbenshade, W.R., W. S. Curran, G. W. Roth, N. L. Hartwig, And M. D. Orzolek. 2001. Effect of burcucumber (Sicyos angulatus) establishment date and crop competition on burcucumber fecundity. Weed Sci. 49:524–527. Abstract.

  70. Messersmith, D. T., W. S. Curran, N. L. Hartwig, M. D. Orzolek, and G. W. Roth. 2000. Tillage and herbicides affect burcucumber (Sicyos angulatus) management in corn. Agron. J. 92:181–185. Abstract.

  71. Curran, W. S. M. H. Hall, and E. L. Werner. 1999. Effect of varying imazethapyr application rate and timing on yield of seedling grass-alfalfa mixtures. J. Prod. Agric. 12:244–248.
  72. Messersmith, D. T., W. S. Curran, N. L. Hartwig, M. D. Orzolek, and G. W. Roth. 1999. Evaluation of several herbicides for burcucumber (Sicyos angulatus) control in corn. Weed Technol. 13:520–524. Abstract.
  73. Parks, R. J., W. S. Curran, G. W. Roth, N. L. Hartwig, and D. D. Calvin. 1996. Herbicide susceptibility and biological fitness of triazine-resistant and susceptible common lambsquarters (Chenopodium album L.). Weed Sci. 44:517–522.
  74. Olsen, R. J., J. K. Harper, and W. S. Curran. 1996. Selecting cost minimizing herbicide programs for corn using integer programming. Weed Technol. 10:327–336.
  75. Parks, R. J., W. S. Curran, G. W. Roth, N. L. Hartwig, and D. D. Calvin.  1995. The effectiveness of post herbicides and cultivation for common lambsquarters (Chenopodium album L.) control in corn.  Weed Technol. 9:728-735.
  76. Hall, M. H. and W. S. Curran. 1995. Evaluation of weed control practices during spring and summer alfalfa establishment. J. of Prod. Agric. 8(3) 360–365.
  77. Nandula, V. K., W. S. Curran, G. W. Roth, and N. L. Hartwig. 1995. Effectiveness of nicosulfuron and primisulfuron on wirestem muhly (Muhlenbergia frondosa) in no-till corn (Zea mays). Weed Technol. 9:331–338.
  78. Curran, W. S., L. D. Hoffman, and E. L. Werner. 1994. The influence of a hairy vetch (Vicia villosa) cover crop on weed control in corn (Zea mays). Weed Technol. 8:777–784.
  79. Curran, W. S., E. L. Werner, and N. L. Hartwig.  1994.  Effectiveness of herbicides and tillage on quackgrass (Elytrigia repens) control in corn (Zea mays). Weed Technol. 2:324-330.
  80. Curran, W. S., M. M. Loux, R. A. Liebl, and F. W. Simmons.  1992.  Photolysis of imidazolinone herbicides in aqueous solution and on soil.  Weed Sci. 40:143-148.
  81. Curran, W. S., R. A. Liebl, and F. W. Simmons.  1992.  Effects of tillage and application method on clomazone, imazaquin, and imazethapyr persistence.  Weed Sci. 40:482-148.
  82. Heinemann, P. H., D. D. Calvin, J. Ayers, J. M. Carson, W. S. Curran, V. Eby, R. L. Hartzler, J. G. W. Kelly, J. McClure, G. Roth, and J. Tollefson.  1992.  Maize:  a decision support system for management of field corn.  Appl. Eng. in Agric. 8(3):407-414.
  83. Curran, W. S., E. L. Knake, and R. A. Liebl.  1991.  Corn (Zea mays) injury following use of clomazone, chlorimuron, imazaquin, and imazethapyr.  Weed Technol. 5:539-544.
  84. Curran, W. S., L. A. Morrow, and R. E. Whitesides.  1987.  Lentil (Lens culinaris) yield as influenced by duration of wild oats (Avena fatua) interference.  Weed Sci. 35:669-672.