1. Peanut Weed Control Update 2010 (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) LSD 0.10 = 185 PE-08-09 Averaged over 3 varieties (GA Green, GA-06G, GA-07W) Weed-free

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

8. Gramoxone Inteon @ 8.0 oz/A 80/20 @ 0.25% v/v 7 DAT FL-07 GA-06G

9. Gramoxone Inteon @ 8.0 oz/A 80/20 @ 0.25% v/v 7 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 Cadre Cadre + Elast 2009 Field Trial Cadre Ultra Blazer Cobra 2,4-DB Select Max No major problems only 1 trial so far

15. Influence of water volume on peanut injury caused by Provost (10 oz/A) + 2,4-DB (18 oz/A) – 4 DAT GA-06G (21 DAP) Application Time of Day: 8:30 am Air Temp = 85 F RH = 77% 15 GPA10 GPA

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

17. Cobra @ 12.5 oz/A + 1% COCCobra @ 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 Tifton 1996-2009 8 of 14 years (57%) less than average rainfall

22. May Rainfall – Statesboro 1996-2009 9 of 14 years (64%) less than average rainfall

23. Palmer Amaranth Control with Gramoxone Inteon 2SL @ 2.5 pt/A + 80/20 @ 0.25% v/v 6 hours4 days 7 days 19 days AMAPA Height Low = 8” High = 23” Average = 17”

24. Palmer amaranth control is not impossible! NTC Prowl H 2 O @ 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) 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 2 oz applied prior to strip tillageValor 2 oz applied after to strip tillage Valor Response to Tillage. Macon Co., 2009 at 49 DAT

29. Ropewick vs. WeedWiper Ponder 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 – II 9 DAT NTCRopewickWeedWiper 50% solution of Gramoxone Inteon + 80/20 @ 0.25% v/v AMAPA Height at Application: Low = 28”, High = 62”, Average = 37”

31. NTC WeedWiper Test – III 7 DAT Cobra 2EC 50% solution 80/20 @ 0.25% v/v Gramoxone Inteon 2SL 50% solution 80/20 @ 0.25% v/v Pigweed-04-09 09/15/09 Rep 3

32. A long-term resistance plan? CropPPI/PREPOST1POST2MOA’s Peanut (No ALS) DNA + Valor Cadre2,4-DB4 Peanut (ALS) DNAParaquat Basagran + Dual Ultra Blazer + Dual 5 RR-CottonReflexGlyphosate + Staple Direx + MSMA 5 RR-cornMicro-TechGlyphosate + atrazine --3 RR- soybean BoundaryGlyphosate + FirstRate --4 LL-soybeanDual Magnum Ignite2

33. Cutleaf Eveningprimrose Control 21 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