Weed Control in Sunflowers Eric P. Prostko Extension Weed Specialist Department of Crop - PowerPoint PPT Presentation

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Weed Control in Sunflowers Eric P. Prostko Extension Weed Specialist Department of Crop

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Weed Control in Sunflowers Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia Follow UGA Production Practices ... – PowerPoint PPT presentation

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Title: Weed Control in Sunflowers Eric P. Prostko Extension Weed Specialist Department of Crop


1
Weed Control in SunflowersEric P.
ProstkoExtension Weed SpecialistDepartment of
Crop Soil SciencesThe 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 _at_ 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 GMOs

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
2004 (7 WAP)
NTC
Prowl H2O _at_ 2 pt/A Spartan _at_ 4 ozs/A (PRE)
7
2006 (7 WAP)
Prowl H2O _at_ 2.1 pt/A Spartan 4F _at_ 4.0 oz/A PRE
NTC
8
2004 (7 WAP)
Prowl H2O _at_ 2 pt/A (PRE) Beyond _at_ 4 ozs/A 80/20
UAN (POST)
NTC
9
2006 (7 WAP)
Prowl H2O _at_ 2.1 pt/A Spartan 4F _at_ 4.0 oz/A PRE
Prowl H2O _at_ 2.1 pt /A (PRE) Beyond _at_ 4 ozs/A
80/20 UAN (POST)
NTC
10
2004 (7 WAP)
Dual Magnum _at_ 1.33 pt/A (PRE) Beyond _at_ 4 ozs/A
80/20 UAN (POST)
NTC
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
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