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GRAIN SORGHUM WEED CONTROL UPDATE – 2018
AUTHOR
Eric P. Prostko
Professor and Extension Weed Specialist
University of Georgia
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TABLE OF CONTENTS
GRAIN SORGHUM WEED CONTROL UPDATE - 2018
GRAIN SORGHUM WEED CONTROL
Grain Sorghum - 2017
Grain Sorghum - 2017
Huskie Injury on Sorghum
Huskie @ 13 oz/A + Atrazine @ 16 oz/A + AMS Xtra @ 2% v/v + Adept @ 0.25% v/v - 3 DAT
Zest(TM) 75 WDG/Inzen(TM) Grain Sorghum
Inzen Sorghum - 2017
Inzen Sorghum - 2017 (ADV G3250ALS)
Zest Injury on Inzen Grain Sorghum
Grain Sorghum After Reflex? (10 month rotation restriction)
Reflex Concentrations in Soil After PRE Applications Under Assorted Mulches
Sunflower Weed Control
Sunflowers Acres in Georgia
What is labeled? (not much)
Consider Cultivation
Clearfield Sunflower Weed Control Results
Prowl H2O, Spartan 4F PRE
Harvest Aids for Sunflowers
Questions?
SLIDE CONTENTS
GRAIN SORGHUM WEED CONTROL UPDATE – 2018 Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Dept. Crop & Soil Sciences
GRAIN SORGHUM WEED CONTROL Start clean! Concep treated seed Dual Magnum or Warrant (PRE) Atrazine (POST) or Huskie + ATZ (POST) Paraquat (Hooded sprayer) Mechanical Cultivation
Grain Sorghum - 2017 SG-02-17 June 8 59 DAP NTC Dual Magnum 7.62EC @ 16 oz/A (PRE) Atrazine 4L @ 48 oz/A (30 DAP) COC @ 1% v/v (30 DAP)
Grain Sorghum - 2017 SG-02-17 June 8 59 DAP NTC Dual Magnum 7.62EC @ 16 oz/A (PRE) Huskie 2.06EC @ 13 oz/A (30 DAP) Atrazine 4L @ 16 oz/A (30 DAP) AMS Xtra 3.4SL @ 2.5% v/v (30 DAP) NIS @ 0.25% v/v (30 DAP)
Huskie Injury on Sorghum
Huskie @ 13 oz/A + Atrazine @ 16 oz/A + AMS Xtra @ 2% v/v + Adept @ 0.25% v/v – 3 DAT SG-02-17 April 27
Zest™ 75 WDG/Inzen™ Grain Sorghum Dupont Nicosulfuron (Accent) NON-GMO ONLY on Dupont Inzen™ traited grain sorghum ADVANTA (Alta) and Pioneer Limited performance data for SE 0.67 – 1.33 oz/A (75WDG) Up to 20” tall sorghum Tank-mix with atrazine COC (1% v/v) 28% or 32% UAN (2 qt/A) Dual, Warrant, or Cinch (PRE) Concep treated seed GA Label in November 2016
Inzen Sorghum - 2017 SG-01-17 June 8 59 DAP NTC Cinch 7.64EC @ 16 oz/A (PRE) Zest 75WG @ 0.67 oz/A (30 DAP) Atrazine 4L @ 24 oz/A (30 DAP) COC @ 1% v/v (30 DAP) AMS Xtra 3.4SL @ 2% v/v (30 DAP)
Inzen Sorghum – 2017 (ADV G3250ALS)
Zest Injury on Inzen Grain Sorghum SG-01-16 May 18 9 DAT
Grain Sorghum After Reflex? (10 month rotation restriction) **Average ˝-life in south GA soils was 80 to 128 days (~100 days) Potter et al. 2016. J. Agric. Food Chem. 64:5156-5163
Reflex Concentrations in Soil After PRE Applications Under Assorted Mulches *Myakka sand (1% OM, 6.8 pH; 95% sand, 4% silt, 1% clay); Reflex concentration at application was 139-176 µg/kg Source: Reed et al. 2017. Weed Science (FL)
Sunflower Weed Control Eric P. Prostko Extension Weed Specialist
Sunflowers Acres in Georgia FSA Crop Acreage Reports
What is labeled? (not much) PPI Sonalan or Treflan PPI or PRE Prowl, Dual Magnum, Spartan 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 Hooded Sprayer Aim 2EC @ 1-2 oz/A + COC @ 1% v/v Pigweeds must be 4” or less
Consider Cultivation
Clearfield Sunflower Weed Control Results Clearfield sunflower hybrids that I have worked with since 2003 include the following: Mycogen 8N429CL Mycogen 8N386CL Mycogen 8H419CL Mycogen 8F300CL Dekalb DKF 3880CL
NTC Prowl H2O @ 2.1 pt/A Spartan 4F @ 4.0 oz/A PRE 2006 (7 WAP)
Harvest Aids for Sunflowers Gramoxone (paraquat) Roundup (glyphosate) Sodium chlorate Sharpen (saflufenacil)
Questions?