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Peanut Weed Control Update 2010 (County Extension Agents)

Peanut Weed Control Update 2010 (County Extension Agents). Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia. New Stuff. Fusilade in Peanuts. Finally Labeled in 2009 How does it compare to Poast (P) or Select (S)??? Grass Weeds

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Peanut Weed Control Update 2010 (County Extension Agents)

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  1. Peanut Weed Control Update2010(County Extension Agents) Eric P. Prostko Extension Weed Specialist Department of Crop & Soil Sciences The University of Georgia

  2. New Stuff

  3. Fusilade in Peanuts • Finally Labeled in 2009 • How does it compare to Poast (P) or Select (S)??? • Grass Weeds • Bermudagrass (F=S>P) • B. signalgrass (P=S>F) • Goosegrass (F=P=S) • TX panicum (P=S>F) • Crabgrass (P=S>F) • Bristly starbur control?

  4. Fusilade/Bristly Starbur Source: Dr. Greg MacDonald University of Florida

  5. Reflex in Peanuts

  6. Peanut Yield Response to Reflex (R) and Valor (V) PE-08-09 Averaged over 3 varieties (GA Green, GA-06G, GA-07W) Weed-free LSD 0.10 = 185

  7. New Variety Concerns • GA-06G • Florida-07

  8. Gramoxone Inteon @ 8.0 oz/A80/20 @ 0.25% v/v7 DAT FL-07 GA-06G

  9. Gramoxone Inteon @ 8.0 oz/A80/20 @ 0.25% v/v7 DAT GA-06G FL-07

  10. Classic and GA-06G (2008) * 0.5 oz/A 80/20 P = 0.0843 LSD 0.10 = 343

  11. Classic and GA-06G (2009) * 0.5 oz/A 80/20 P = 0.0607 LSD 0.10 = 572

  12. Classic and FL-07 (2009) * 0.5 oz/A 80/20 P = 0.0767 LSD 0.10 = 297

  13. Herbicide/Fungicide Tank-Mixes

  14. Elast • 2009 Field Trial • Cadre • Ultra Blazer • Cobra • 2,4-DB • Select Max • No major problems • only 1 trial so far Cadre Cadre + Elast

  15. Influence of water volume on peanut injury caused by Provost (10 oz/A) + 2,4-DB (18 oz/A) – 4 DAT 15 GPA 10 GPA GA-06G (21 DAP) Application Time of Day: 8:30 am Air Temp = 85 F RH = 77%

  16. A Bad Idea! Headline + Cadre + Strongarm + 2,4-DB + Dyne-Amic

  17. Cobra @ 12.5 oz/A + 1% COC Cobra @ 12.5 oz/A + Provost @ 8 oz/A Cobra @ 12.5 oz/A + Provost @ 8 oz/A + 1% COC 1 DAT

  18. Pigweed

  19. Pigweed Control is not impossible!!!!! Somewhere in SW Georgia September 2009

  20. Prostko’s Picks for Pigweed • Irrigated or Dryland! • Start Clean! • Use a residual! • POST treatments when 3” tall or less • Remove escapes before seed production • Think About the Future

  21. May Rainfall – CPES Tifton1996-2009 8 of 14 years (57%) less than average rainfall

  22. May Rainfall – Statesboro1996-2009 9 of 14 years (64%) less than average rainfall

  23. 6 hours 4 days 19 days 7 days Palmer Amaranth Control with Gramoxone Inteon 2SL @ 2.5 pt/A + 80/20 @ 0.25% v/v AMAPA Height Low = 8” High = 23” Average = 17”

  24. Palmer amaranth control is not impossible! Prowl H2O @ 34 oz/A – PRE Valor 51WG @ 3 oz/A – PRE Cadre 2AS @ 4 oz/A – POST (29 DAP) Agrioil @ 1% v/v – POST (29 DAP) NTC PE-14-09 July 23 56 DAP

  25. NTC Gramoxone Inteon 2SL @ 12 oz/A Storm 4SL @ 24 oz/A 80/20 @ 0.25% v/v Applied 21DAP PE-11-09 July 1 22 DAT

  26. Valor Injury @ (6 oz/A) 16 DAT PE-05-09 May 22, 2009

  27. Peanut Yield Response to Valor - 2009 PE-08-09 Averaged over 3 varieties (GA Green, GA-06G, GA-07W) Weed-free LSD 0.10 = 185

  28. Valor Response to Tillage. Macon Co., 2009 at 49 DAT Valor 2 oz applied prior to strip tillage Valor 2 oz applied after to strip tillage

  29. Ropewick vs. WeedWiperPonder Farm, 2009 ****Roller applicator was first mentioned in literature in 1977. Wyse, D.L and C. Habstritt. 1977. A roller herbicide applicator. Proc. North Cent. Weed Control Conf. 32:144-145.

  30. Ropewick vs. WeedWiper – II9 DAT NTC Ropewick WeedWiper 50% solution of Gramoxone Inteon + 80/20 @ 0.25% v/v AMAPA Height at Application: Low = 28”, High = 62”, Average = 37”

  31. Gramoxone Inteon 2SL 50% solution 80/20 @ 0.25% v/v Cobra 2EC 50% solution 80/20 @ 0.25% v/v NTC WeedWiper Test – III7 DAT Pigweed-04-09 09/15/09 Rep 3

  32. A long-term resistance plan?

  33. Cutleaf Eveningprimrose Control21 DAT 2,4-DB 1.75SL @ 16 oz/A Agridex @ 1% v/v 99% Visual Control 85% Biomass Reduction Cobra 2EC @ 12.5 oz/A Agridex @ 1% v/v 80% Visual Control 73% Biomass Reduction Applied: 7” tall 11” diameter Bud stage

  34. For More Weed Science Info www.gaweed.com

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