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Weed Science Research/Instruction Post-Tenure Review

Weed Science Research/Instruction Post-Tenure Review. William K. Vencill Department of Crop & Soil Sciences University of Georgia Athens, GA. Background. Appointment (55% Research, 45% Instruction) Research Areas Herbicide Resistance Herbicide Physiology Herbicide Soil Interactions

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Weed Science Research/Instruction Post-Tenure Review

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  1. Weed Science Research/InstructionPost-Tenure Review William K. Vencill Department of Crop & Soil Sciences University of Georgia Athens, GA

  2. Background • Appointment (55% Research, 45% Instruction) • Research Areas • Herbicide Resistance • Herbicide Physiology • Herbicide Soil Interactions • Weed Management Systems in Herbicide-Tolerant Crops

  3. Research – Herbicide Resistance

  4. S.O. Duke: WSSA – Feb., 2011, Portland, OR

  5. Total Acres Exposed to Herbicide Sites of Action for Corn, Soybean, Cotton NASS, 2007

  6. From Gerwick, Sept., 2010, Agrow S.O. Duke; WSSA – Feb., 2011, Portland, OR

  7. Counties with Glyphosate-Resistant Amaranth

  8. Glyphosate Resistance • Target site resistance • Vacuolar sequestration • Overexpression EPSP target site • Does this occur in all glyphosate-resistant Palmer amaranth populations? • Do multiple mechanisms occur in some populations?

  9. EPSPS Activity in Palmer F2 Plants 54 copies, 22 µM 39 copies, 13 µM 7.5 copies, 42 µM 1 copy, 67 µM PNAS, 2010

  10. Other resistance research • Triazine-Resistant Palmer • Dinitroaniline-Resistant Palmer • Multiple-Resistant Palmer • ACCase-Resistant Large Crabgrass and Ryegrass

  11. Triazine Resistant Palmer Amaranth 0 100 1000 5000 10000 Atrazine (g/ha)

  12. Atrazine Metabolism

  13. Weeds with Resistance to More than one Mechanism of Action The number of weed species with resistance to more than one herbicide mechanism of action has increased drastically since 1990. Currently, 50 weed species with multiple forms of resistance have been confirmed. Source: www.weedscience.org, Ian Heap, March 2011

  14. R – Non-target R – ALS Trp 574 -> Asp R – ALS Ser 653 -> Asp R – ALS Ala 122 -> Trp Susceptible

  15. ALS-Resistant Palmer Amaranth

  16. ALS Resistance • What are the mechanisms of the non-target site resistance?

  17. Questions about Herbicide Resistance • Why are some weeds more prone to developing resistance than others? • Why have some weeds never developed resistance even with intensive pressure? • Why are some herbicide MOA more prone to resistance development than others?

  18. Proposed Resistance Risk Classification a Integrated Pest Mgmt refers to use of all weed control tools available such as crop rotation, tillage, preventative practices, etc.

  19. Herbicide-Resistant Weeds Loss of Options

  20. Other projects • New herbicide for other crops • Pearl millet • Sunflower • Sweet sorghum • Canola • Stevia

  21. APHIS – WSSA Publications • . APHIS contracted with WSSA to have a state of the art paper written on herbicide-resistance Second project contracted with APHIS to write a paper on recommendations Both papers served as foundation for National Academy of Sciences Summit on Strategies to Manage Herbicide-Resistant Weeds

  22. Weed Science Editor Editor since 2009 ~200 manuscripts/year Reduced time from submission to first response from 62 d to 45 d

  23. Teaching

  24. Weed Science – CRSS 4340/6340 Weed Science Lab – CRSS 4340L/6340L Herbicide Physiology – CRSS 8330-8330L Team teach Pesticide Use – CRSS(ENTO)(PATH)4250 Integrated Pest Mgmt – ENTO(CRSS) 4740/6740 Chemical Toxicology – PHRM 8930 First Year Odyssey Seminar Teaching

  25. Instruction-Related Accomplishments • Undergraduate Coordinator (since 1997) • College Curriculum (since 2000) Chair – 2007 and 2011 • University Curriculum (2000-2007) • General Education (2002-present) • Board of Regents Committee to reform Core Curriculum (2008) • Board of Regents Council of General Education (since 2010) • ConnectUGA Project Advisory Team (2012-2015)

  26. Awards & Honors • 2011 D.W. Brooks Faculty Award for Excellence in Teaching • 2012 – Senior Teaching Fellow

  27. In the past five years, have mentored six graduate students on a thesis program; four on a non-thesis program. Serve as the Crop & Soil Science representative on the Master of Plant Protection Pest Management Program On all student’s committees Proctor an exit written exam on weed science Teaching – Graduate Students

  28. Administrative Duties

  29. http://www.uga.edu/effectiveness/sp.html

  30. Other Administrative Duties • Supervised Office of Faculty Affairs • Promotion and tenure committees • Workshops for faculty • University Program Review • University System Ethics Policy Committee • Budget Review • SACS Leadership & Compliance

  31. Any Questions?

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