Shawn Askew

Associate Professor Extension Turfgrass Weed Specialist 203 PMB Building (0330) Glade Road Research Center Virginia Tech Blacksburg, VA 24061 Phone: (540) 231-5807 Fax: (540) 231-5755 E-Mail: saskew at vt.edu Web: www.turfweeds.net

Education| Research Interests| Extension Interests| Awards| Experience| Selected Publications

Education

• Ph.D., Crop Science Department, North Carolina State University, 2001.
• M.S., Department of Plant and Soil Sciences, Mississippi State University, 1997.
• B.S., Agricultural Pest Management, Mississippi State University, 1995.

Research Interests

The research endeavors of Dr. Askew's position are closely tied to his extension activities. Research efforts of his program include: development and evaluation of new herbicides on site and in the lab/glasshouse, evaluation of organic and cultural weed control, new diagnostic and application technology, and environmental effects of weed management in turfgrass. Dr. Askew is currently seeking qualified graduate students to participate in research and educational activities.

Extension Interests

Dr. Askew's primary responsibility is to provide statewide leadership in the development of weed control programs for turfgrass. Emphasis is placed on development of recommendations and other weed control information pertinent to current problems in home lawns, professional turf (golf courses, football fields, etc.) and commercial sod and seed production. Dr. Askew maintains a close working relationship with Virginia Cooperative Extension agents and provides training aids and research to address turfgrass weed problems. A significant amount of his time is spent developing extension publications, troubleshooting, and conversing with agents, professional turfgrass personnel, and sod/seed farmers.

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Awards

• Certificate of Appreciation for Service as Web Master and Web Site Development, Northeastern Weed Science Society, 2005
• Outstanding Ph.D. Student, Weed Science Society of America, 2002.
• Outstanding Ph.D. Student, Crop Science Department, NCSU, 2001.
• Outstanding Ph.D. Student, Weed Science Society of North Carolina, 2001.
• Outstanding Masters Student, Southern Weed Science Society, 1998.

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Experience

• Assistant Professor of Turfgrass Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, 2001-present.
• Research Associate, Crop Science Department, North Carolina State University, (Under direction of Dr. John Wilcut), 1997-2001.
• Graduate Research Assistant, Department of Plant and Soil Sciences, Mississippi State University, (Under direction of Dr. David Shaw), 1994-1997.

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Selected Publications

* Denotes current or former graduate student

• Beam*, J. B. and S. D. Askew. 2007. Fate of prohexadione calcium in annual bluegrass (Poa annua) and three turfgrasses. Weed Sci. (submitted).
• Willis*, J. B. and S. D. Askew. 2007. Distance and Severity of Creeping Bentgrass Injury from Mower-Dislodged Sulfonylurea Herbicides. Weed Technol. (submitted).
• Willis*, J. B., D. B. Ricker, and S. D. Askew. 2007. Sulfonylurea Herbicides Applied During Early Establishment of Seeded Bermudagrass. Weed Technol. (submitted).
• Willis*, J. B., J. B. Beam, W. L. Barker, S. D. Askew, and J. S. McElroy. 2007. Selective Nimblewill (Muhlenbergia schreberi) Suppression in Cool-Season Turfgrass. Weed Technol. (accepted).
• Willis*, J. B., S. D. Askew, and J. S. McElroy. 2007. Improved White Clover Control with Mesotrione by Tank-mixing Bromoxynil, Carfentrazone, and Simazine. Weed Technol. (in press).

• Barker*, W. L., J. B. Beam*, and S. D. Askew. 2006. Persistence of rimsulfuron on perennial ryegrass (
• Lolium perenne) and annual bluegrass (Poa annua) foliage. Weed Technol. 20:345-350.
• Beam*, J. B., W. L. Barker*, and S. D. Askew. 2006. Selective creeping bentgrass (Agrostis stolonifera) control in cool-season turfgrass. Weed Technol. 20:340-344.
• McCullough, P. E., S. E. Hart, S. D. Askew, P. H. Dernoeden, Z. Reicher, and D. Weisenberger. 2006. Kentucky bluegrass control with postemergence herbicides. HortScience 41:255-258.
• Munshaw, G. C., E. H. Ervin, C. Shang, S. D. Askew, X. Zhang, and R. W. Lemus. 2006. Influence of Late-Season Iron, Nitrogen, and Seaweed Extract on Fall Color Retention and Cold Tolerance of Four Bermudagrass Cultivars. Crop Sci. 46:273-283.
• Thomas, W. T., T. T. Britton, S. B. Clewis, S. D. Askew, and J. W. Wilcut. 2006. Glyphosate-resistant cotton (Gossypium hirsutum) response and weed management with trifloxysulfuron, glyphosate, prometryn, and MSMA. Weed Technol. 20:6-13.
• Willis*, J. B., J. B. Beam*, W. L. Barker*, and S. D. Askew. 2006. Weed control options for spring seeded tall fescue (Festuca arundinacea). Weed Technol. 20:1040-1046.
  2005
  • Barker*, W. L., J. B. Beam, and S. D. Askew. 2005. Effects of rimsulfuron lateral relocation on creeping bentgrass (Agrostis stolonifera). Weed Technol. 19:647-652.
  • Beam*, J. B. and S. D. Askew. 2005. Prohexadione calcium effects on bermudagrass, Kentucky bluegrass, perennial ryegrass, and zoysiagrass. Int. Turf. Soc. Res. J. 10:286-295.
  • Beam*, J. B. and S. D. Askew. 2005. Italian ryegrass (Lolium multiflorum) control in newly seeded tall fescue (Festuca arundinacea). Weed Technol. 19(2):156-161.
  • Burke, I. C., S. C. Troxler, S. D. Askew, J. W. Wilcut, and W. D. Smith. 2005. Weed management systems in glyphosate-resistant cotton (Gossypium hirsutum). Weed Technol. 19:422-429.
  • Burke, I. C., S. D. Askew, J. L. Corbett, and J. W. Wilcut. 2005. Glufosinate antagonizes clethodim control of goosegrass (Eleusine indica). Weed Technol. 19:664-668.

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