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William S. Curran, Ph.D.

  • Professor of Weed Science
William S. Curran, Ph.D.
423 Agricultural Sciences and Industries Building
University Park, PA 16802
Work Phone: 814-863-1014

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

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

Responsibilities and Interests:

Bill is a Professor in the Department of Plant Science and has been a member of the faculty since 1990. Dr. Curran has an extension-research split and has statewide responsibilities for weed management in agronomic crops. Bill’s extension education program focuses on providing his ag constituents with the latest weed management information. Bill conducts research on basic weed biology, integrated weed management, weed management in conservation tillage systems including managing cover crops and most recently, he has focused on opportunities for managing weeds in organic crop production systems. Dr. Curran is active regionally and nationally in several scientific societies. He’s an active member in the Weed Science Society of America, the Northeast Weed Science Society, Northeast Sustainable Ag Research and Education (SARE), and the Pennsylvania Agronomic Education Society.

Appointment:

  • 75% Extension
  • 25% Research

Links:

Current Graduate Students:

Professional Background:

  • 1990–present, 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. Cahoon, C. R. Chandran, W. Curran, M. Flessner, T. Hines Q. Johnson D. Lingenfelter, B. Schulz and M. VanGessel.  2016.  2016 Mid-Atlantic Field Crop Weed Management Guide. Penn State University College of Ag. Sciences.  (http://extension.psu.edu/publications/agrs136).

  2. 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).

  3. 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).
  4. 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).

  5. 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.
  6. 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)
  7. 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).
  8. Ryan, MR, DA Mortensen, and WS Curran. 2010. Weed management tactics in organic no-till. http://agsci.psu.edu/susag/newsletter/august09/4organicnotill.
  9. 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
  10. 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.
  11. 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.
  12. Lingenfelter, D. and W.S. Curran. 2007. Weed management in CREP grasslands, Agronomy Facts 66, Penn State College of Agric. Sci., Univ. Park, PA.
  13. 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
  14. Curran, W.S. 2004. Weed management in organic cropping systems, Agronomy Facts 64. Penn State College of Agric. Sci., Univ. Park, PA
  15. 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.
  16. Curran, W.S. 2001. Weed management in pasture systems, Agronomy Facts 62. Penn State College of Agric. Sci., Univ. Park, PA
  17. Curran, W.S., J. Harper, and D.D. Lingenfelter. 2000. Herbicide resistant crops in 2000, Penn State College of Agric. Sci., Univ. Park.
  18. Curran, W. S and D. D. Lingenfelter. 2000. Field crop weed control guide. Penn State College of Agric. Sci., Univ. Park, PA., 92 pages.
  19. 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
  20. Curran, W. S. 1999. Management of shattercane and johnsongrass; an integrated approach, Agronomy Facts 4, Penn State College of Agric. Sci., Univ. Park, PA.
  21. 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.
  22. Curran, W. S. 1998. Persistence of herbicides in soil, Agronomy Facts 36, Penn State College of Agric. Sci., Univ. Park, PA.
  23. 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.
  24. 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.
  25. 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.
  26. 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.
  27. Gunsolus, J. and W. S. Curran. 1996. Herbicide mode of action and injury symptoms (revised). North Centr. Reg. Ext. Publ. No. 377.

Research

  1. 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. (accepted with revision)

  2. 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.  (accepted with revision).

  3. Menalled, F., R. Peterson, R. Smith, W. Curran, D. Paez, and B. Maxwell.  2017.  The eco-evolutionary imperative: revisiting weed management in the midst of an herbicide resistance crisis.  Sustainability (In Press).

  4. 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. (In Press.).

  5. 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. 30: XXX-XXX.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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. 
  15. 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.
  16. 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.
  17. 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.
  18. 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.
  19. 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.
  20. 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.
  21. 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.
  22. 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.
  23. 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.
  24. Dillehay, B.L., W.S. Curran, D.A. Mortensen. 2011. Critical period of weed control in alfalfa. Weed Sci. 59:598-603.
  25. 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.
  26. Dillehay, B.L. and W.S. Curran. 2010. Comparison of herbicide programs for weed control in glyphosate-resistant alfalfa. Weed Technol. 24:130–138.
  27. 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.
  28. 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.
  29. 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.
  30. 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.
  31. 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.
  32. 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.
  33. 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.
  34. 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.
  35. 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).
  36. 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.
  37. 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.
  38. 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.
  39. 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.
  40. 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.
  41. 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.
  42. 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.
  43. 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.
  44. 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.
  45. 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.
  46. 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.
  47. 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.
  48. 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.
  49. 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.
  50. 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.
  51. 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.
  52. 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.
  53. 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.
  54. 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.
  55. 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.
  56. 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.
  57. 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.
  58. 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.
  59. 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.