Jeffrey Derr

Professor Hampton Roads Ag. Res. and Ext. Center 1444 Diamond Springs Road Virginia Beach, VA 23455 Phone: (757) 363-3912 Fax: (757) 363-3950 E-Mail: jderr at vt.edu

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

Education

• Ph.D. Weed Science , North Carolina State University
• M.S. Weed Science, North Carolina State University
• B.S. Horticulture, Pennsylvania State University

Research Interests

• Develop improved control of annual and perennial broadleaf weeds in tree and small fruit production
• Develop Integrated Pest Management (IPM) strategies for weeds in nursery crops.
• Evaluate strategies for yellow nutsedge management in horticultural crops
• Improve ways for grass weed control in turf situations.
• Alternatives to chemicals for weed management through evaluation of mulches, landscape fabrics, and other nonchemical strategies for weed control
• Evaluate herbicides with reduced risk to the environment for cost-effective weed management in horticultural crops

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Selected Research Support

• Agribusiness
• IR-4 program
• Virginia Ag. Council
• Virginia Nursery and Landscape Association
• Virginia Turfgrass Foundation

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Awards

• President-elect, Weed Science Society of America, 2007 to present.
• Vice President, Weed Science Society of America, 2006-2007.
• Distinguished Service Award. 2005. Tidewater Turfgrass Association of Virginia.
• 2003 Virginia Turfgrass Council Award.
• President, Northeastern Weed Science Society, 2001-2002.
• 2000 Outstanding Extension Team Award - Turf IPM (Integrated Pest Management) Advisory Team Member. Alpha Gamma Chapter, Epsilon Sigma Phi.
• 1997 Outstanding Applied Research Award for Turf, Ornamentals, and Vegetation Management. Northeastern Weed Science Society.

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Experience

• Professor and Extension Weed Scientist for Horticultural Crops, 1999 to present.
• Assoc. Professor and Extension Weed Scientist for Horticultural Crops, Dept. Plant Path., Physiol. and Weed Science/HRAREC, 1990 to 1999.
• Asst. Professor and Extension Weed Scientist for Horticultural Crops , Virginia Tech, 1984-1990.

  Position responsibilities: conduct a statewide extension and research program in weed management for horticultural crops. Commodity responsibilities include tree fruit, small fruit, nursery and landscape ornamentals, and turf.

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Extension Programs

• Weed Identification: Provide information on weed identification and identification of herbicide injury at extension programs and growers meetings in western, central, northern, and eastern Virginia.
• Integrated Pest Management (IPM): Develop control recommendations for weed management in horticultural crops using an integrated pest management approach. Research results are incorporated yearly into the Pest Management Guides, other extension publications, and through the preparation of popular articles. Weed management options are provided to growers at extension programs, field days, and special seminars.

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Selected Publications

1. Czarnota, M. A. and J. F. Derr. 2007. Controlling Bamboo (Phyllostachys spp.) with Herbicides. Weed Technology 21:80-83.
2. Derr, J. F. and L. D. Simmons. 2006. Pendimethalin influence on azalea shoot and root Growth. J. Environmental Horticulture 24:221-225.
3. Hart S., J. Derr, D. Lycan, C. Rose-Fricker and W. Meyer. 2005. Increased glyphosate tolerance in 'Aurora Gold' hard fescue (Festuca longifolia). Weed Technology 19: 640-646.
4. Judge C., J. Neal and J. Derr. 2005. Response of japanese stiltgrass (Microstegium vimineum) to application timing, rate, and frequency of postemergence herbicides. Weed Technology. 19: 912-917.
5. McElroy J., G. Breeden, F. Yelverton, T. Gannon, S. Askew and J. Derr. 2005. Response of four improved seeded bermudagrass cultivars to postemergence herbicides during seeded establishment. Weed Technology 19: 979-985.
6. Judge, C., J. C. Neal, and J. F. Derr. 2005. Preemergence and postemergence control of Japanese stiltgrass (Microstegium vimineum). Weed Technology 19:912-917.
7. Derr, J. F. 2004. The status of Weed Science at universities and experiment stations in the northeastern United States. Weed Technology 18:1150-1156.
8. Derr, J. F. 2002. Tolerance of ornamental grasses to preemergence herbicides. J. Environ. Hort. 20:161-165.
9. Derr, J. F. 2002. Detection of fenoxaprop-resistant smooth crabgrass (Digitaria ischaemum) in turf. Weed Technology 16:396-400.
10. Derr, J. F. 2001. Biological assessment of herbicide use in apple production. I. Background and current use estimates. HortTechnology 11:11-19.
11. Derr, J. F. 2001. Biological assessment of herbicide use in apple production. II. Estimated impacts following loss of specific herbicides. HortTechnology 11:20-25.
12. Chandran , R. S. and J. F. Derr. 1999. Isoxaben dissipation in field soil as affected by application timing. J. Environ. Qual. 28:1760-1764.
13. Chandran, R. S. and J. F. Derr. 1998. Duration of broadleaf weed control with isoxaben using soil bioassays. Weed Technol. 12:542-547.
14. Chandran, R. S., J. F. Derr, and S. W. Bingham. 1998. Effect of isoxaben application rate and timing on residual broadleaf weed control in turf. Weed Technol. 12:569-574.
15. Salihu, S., J. F. Derr, and K. K. Hatzios. 1998. Effect of Gallery applied at different growth stages to dwarf burning bush (Euonymus alatus 'Compacta'). J. Environ. Hort. 16:155-158.
16. Salihu, S., K. K. Hatzios, and J. F. Derr. 1998. Comparative uptake, translocation, and metabolism of root-applied isoxaben in ajuga (Ajuga reptans), and two ornamental euonymus species). Pest. Biochem. 60:119-131.
17. Y. Kuk, J. Wu, J. F. Derr, and K. K. Hatzios. 1999. Mechanism of fenoxaprop resistance in an accession of smooth crabgrass (Digitaria ischaemum). Pest. Biochem Physiol. 64:112-123.

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