Slide Presentation

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Weed Control in Sunflowers

AUTHOR
Eric P. Prostko
Extension Weed Specialist
Dept of Crop and Soil Sciences
The University of Georgia
Tifton, GA

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TABLE OF CONTENTS
  1. Weed Control in Sunflowers
  2. Follow UGA Production Practices
  3. What is labeled? (not much)
  4. Consider Cultivation
  5. Clearfield Sunflower Weed Control Results
  6. Prowl + Spartan (PRE)
  7. Prowl + Spartan (PRE)
  8. Prowl (PRE); Beyond (POST)
  9. Prowl (PRE); Beyond (POST)
  10. Dual Magnum (PRE); Beyond (POST)
  11. Harvest Aids for Sunflowers
  12. UGA Weed Science



SLIDE CONTENTS
  1. Weed Control in Sunflowers Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia
  2. Follow UGA Production Practices Planting Date soil temp at least 600F Plant Population 16,000 to 18,000 plants/A (Final) Row Spacing 24-36” Soil Fertility 6.0 pH Fertilize according to soil test results
  3. What is labeled? (not much) PPI Sonalan or Treflan PPI or PRE Prowl, Dual Magnum, Spartan ($400/gal = $9.38-12.50/A @ 3-4 ozs/A) POST Arrow, Assure II, Select, Poast, SelectMax (grasses only) Beyond (imazamox) only on Clearfield hybrids Beyond same family as Cadre, Pursuit, and Scepter Beyond costs about $525/gal (4 ozs/A = $16.41/A) $157/bag (200,000 seed ~ 10 acres) = $15.70/A Clearfield sunflower hybrids are not GMO’s
  4. Consider Cultivation
  5. Clearfield Sunflower Weed Control Results Clearfield sunflower hybrids that I have worked with since 2003 include the following: Mycogen 8N429CL Mycogen 8N386CL Mycogen 8H419CL Dekalb DKF 3880CL
  6. NTC Prowl H2O @ 2 pt/A + Spartan @ 4 ozs/A (PRE) 2004 (7 WAP)
  7. NTC Prowl H2O @ 2.1 pt/A Spartan 4F @ 4.0 oz/A PRE 2006 (7 WAP)
  8. NTC Prowl H2O @ 2 pt/A (PRE) Beyond @ 4 ozs/A + 80/20 + UAN (POST) 2004 (7 WAP)
  9. NTC Prowl H2O @ 2.1 pt/A Spartan 4F @ 4.0 oz/A PRE 2006 (7 WAP) Prowl H2O @ 2.1 pt /A (PRE) Beyond @ 4 ozs/A + 80/20 + UAN (POST)
  10. NTC Dual Magnum @ 1.33 pt/A (PRE) Beyond @ 4 ozs/A + 80/20 + UAN (POST) 2004 (7 WAP)
  11. Harvest Aids for Sunflowers Paraquat Gramoxone Inteon (1.2-2.0 pt/A) Firestorm (0.8-1.3 pt/A) Parazone (0.8-1.3 pt/A) Sodium Chlorate Defol 5 (4.8 qt/A) Defol 750 (3.2 qt/A) Helena 3 lb Sodium Chlorate ( 2 gal/A) others
  12. UGA Weed Science www.gaweed.com