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2011 Peanut Weed Control Update (County Extension Agents)
AUTHOR
Eric P. Prostko
Professor and Extension Weed Specialist
University of Georgia
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TABLE OF CONTENTS
2011 Peanut Weed Control Update
Topics For Discussion
Spartan Charge 3.5L
Weed Control in Peanut with Spartan Charge
Spartan Injury
Florida Beggarweed Problems
GA-06G Yield Response to Classic (0.5 oz/A) 2008-2009
FL-07 Yield Response to Classic (0.5 oz/A) 2009-2010
Tifguard Yield Response to Classic (0.5 oz/A) 2010-2011
Non-Selective Applicators
Summary of Palmer Amaranth Control (%) with Non-Selective Applicators Using Gramoxone Inteon
WeedWiper vs. TopCrop Sponge
Our First Attempt in a Real Field Tift County, August 2010 (3 DAT)
Tank-Mixtures (At least 24,000 potential tank-mixtures for peanuts)
Leaf Burn Caused By Cadre 2AS (4 oz/A) + Dual Magnum 7.62EC (16 oz/A)+ 2,4-DB 1.75SL (18 oz/A) + Bravo WS 6L (24 oz/A) - 3 DAT
Peanut (GA-06G) Yield Response to Tank-Mixtures Cadre, Dual Magnum, 2,4-DB, Bravo WS - Applied 30 DAP
Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A + 2,4-DB @ 1 pt/A
Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A + 2,4-DB @ 1 pt/A
Ignite/Peanut
Peanut (GA-06G) Response to Ignite @ 32 oz/A
Peanut (GA-06G) Response to Ignite @ 2 oz/A
Estimated Peanut Yields Losses (%) from Ignite 2.34SL
Palmer Amaranth Control Tactics
Many pigweed problems are due to weeds already up at planting!
Palmer Amaranth Control - 2010
Peanut Weed Control - 2010
Palmer Amaranth Control - 2010
ET vs Cobra for Palmer Amaranth Control 14 DAT
Post-Harvest (Corn) AMAPA Problems
When can we stop worrying about Palmer seed production?
When can we stop worrying about Palmer seed production?
Questions?
SLIDE CONTENTS
2011 Peanut Weed Control Update Agent Training December 2010 Eric P. Prostko, Ph.D. Professor and Extension Weed Specialist Department of Crop & Soil Sciences
Topics For Discussion Spartan Charge FL Beggarweed Classic Update Non-Selective Applicators Tank-mixtures Ignite Palmer Amaranth
Spartan Charge 3.5L FMC March 2010 Spartan (3.15 lb/gal) + Aim (0.35 lb/gal) Sulfentrazone + carfentrazone Coarse soils with < 1.5% OM (3.75 oz/A) 3 oz/A of Spartan 4L 0.65 oz/A Aim 2EC Concerns FL. Beggarweed, Tropic croton Another PPO!!!!!!!
Weed Control in Peanut with Spartan Charge PE-16-10 June 8 25 DAT NTC Spartan Charge 3.5L @ 4 oz/A Dual Magnum 7.62EC @ 16 oz/A (PRE) Valor 51WG @ 3 oz/A Dual Magnum 7.62EC @ 16 oz/A (PRE)
Spartan Injury
Florida Beggarweed Problems Residual Herbicides Valor (1) Strongarm (2) Dual (3) Paraquat (cracking) Tank-mixes reduce control Cadre (POST) < 2 tall (supression?) Classic (LPOST) problems with GA-06G, Tifguard Non-Selective Applicators paraquat
GA-06G Yield Response to Classic (0.5 oz/A) 2008-2009 DAE = Days After Peanut Emergence
FL-07 Yield Response to Classic (0.5 oz/A) 2009-2010 DAE = Days After Peanut Emergence
Tifguard Yield Response to Classic (0.5 oz/A) 2010-2011 DAE = Days After Peanut Emergence
Non-Selective Applicators
Summary of Palmer Amaranth Control (%) with Non-Selective Applicators Using Gramoxone Inteon 50:50 solution of Gramoxone Inteon + Water except Trial #4 (25%)
WeedWiper vs. TopCrop Sponge 50% Solution of Gramoxone Inteon 3.1 MPH, 20 Applicator Height AMAPA = 36-86 tall, 66 avg. NTC WeedWiper TopCrop PIG-07-10 9/21/10 29 DAT
Our First Attempt in a Real Field Tift County, August 2010 (3 DAT) Potential Problems No gauge wheel Hydraulic lift problem No check valve on pump Roller Speed Tall peanut variety (GA-02C) Dumb A** Scientist
Tank-Mixtures (At least 24,000 potential tank-mixtures for peanuts)
Leaf Burn Caused By Cadre 2AS (4 oz/A) + Dual Magnum 7.62EC (16 oz/A)+ 2,4-DB 1.75SL (18 oz/A) + Bravo WS 6L (24 oz/A) - 3 DAT
Peanut (GA-06G) Yield Response to Tank-Mixtures Cadre (C), Dual Magnum (DM), 2,4-DB (DB), Bravo WS (B) - Applied 30 DAP PE-19-10 Cadre @ 4 oz/A, Dual Magnum @ 16 oz/A 2,4-DB @ 18 oz/A, Bravo WS @ 24 oz/A LSD 0.10 = NS CV = 10.32 lbs/A
Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A + 2,4-DB @ 1 pt/A (Left) NTC (Middle) Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A (Right) May 8, 2010 13 DAT
Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A + 2,4-DB @ 1 pt/A (Left) NTC (Middle) Gramoxone Inteon @ 12 oz/A + Storm @ 16 oz/A + Dual Magnum @ 1 pt/A (Right) May 26, 2010 July 20, 2010 34 DAT (Cadre) Cadre @ 4 oz/A + Dual Magnum @ 16 oz/A (June 16)
Ignite/Peanut
Peanut (GA-06G) Response to Ignite @ 32 oz/A Applied 30 DAP Applied 60 DAP Applied 90 DAP PE-01-10 September 17 129 DAP
Peanut (GA-06G) Response to Ignite @ 2 oz/A Applied 30 DAP Applied 60 DAP Applied 90 DAP PE-01-10 September 17 129 DAP
Estimated Peanut Yields Losses (%) from Ignite 2.34SL GA-06G 2 locations (Ponder, Plains) 2010
Palmer Amaranth Control Tactics Start Clean!!!!! Irrigation Tillage Extreme Cover Crops Residual Herbicides Timely POSTs Others Hand-Weeding Non-Selective Applicators
Many pigweed problems are due to weeds already up at planting!
Palmer Amaranth Control - 2010 PE-03-10 June 29 NTC Prowl H20 3.8ASC @ 34 oz/A (PRE) Valor SX 51WG @ 3 oz/A (PRE) Cadre 2AS @ 4 oz/A (June 14) COC @ 1% v/v (June 14) (6597 lbs/A)
Peanut Weed Control - 2010 PE-17-10 August 30 91 DAP NTC Valor 51WG @ 3 oz/A (1 DAP) Strongarm 84WG @ 0.23 oz/A (1 DAP) Prowl H20 3.8SC @ 34 oz/A (1 DAP) Cadre 2AS @ 4 oz/A (34 DAP) COC @ 1% v/v (34 DAP) 0 lbs/A 6998 lbs/A
Palmer Amaranth Control - 2010 PE-03-10 June 29 NTC Gramoxone Inteon 2SL @ 12 oz/A (June 2) Storm 4SL @ 16 oz/A (June 2) Dual Magnum 7.62EC @ 16 oz/A (June 2) Cadre 2AS @ 4 oz/A (June 14) Dual Magnum 7.62EC @ 16 oz/A (June 14) (5790 lbs/A)
ET vs Cobra for Palmer Amaranth Control 14 DAT NTC Cobra 2EC @ 12.5 oz/A 80/20 @ 0.25% v/v ET 0.208EC @ 2 oz/A 80/20 @ 0.25% v/v AMAPA Size at Application Low = 2; High = 14, Average = 7 PE-11B-10 9/21/10
Post-Harvest (Corn) AMAPA Problems Decreasing daylight hastens flower and seed production Flowering (3-4 weeks) Seed production (2-3 weeks) Some germination at 410F (8%) Control Options Mowing Tillage Herbicides Paraquat + 2,4-D amine or dicamba Residuals i.e Dual Magnum? When can we stop worrying about seed production? Keeley et al. 1987. Weed Science 35:199-204 Steckel et al., 2004. Weed Science 52:217-221
When can we stop worrying about Palmer seed production? Source: UGA Automated Environmental Monitoring Network Tifton Campus Conference Center
When can we stop worrying about Palmer seed production? Source: UGA Automated Environmental Monitoring Network Midville
Questions? 229-392-1034 (cell) www.gaweed.com