2014 Weed Control Manual for Tennessee Field Crops Forage Crops Pastures Farm Ponds Harvest Aids
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1 PB Weed Control Manual for Tennessee Field Crops Forage Crops Pastures Farm Ponds Harvest Aids Burndown Herbicides 5 Glyphosate Resistance 6 Corn 11 Grain Sorghum 21 Cotton 27 Soybeans 38 Tobacco 48 Wheat 51 Sunflowers 55 Forage & Pastures 59 Farm Ponds 73 Sprayer Calibration 78 Grazing Restrictions 85 Price List 94 Herbicide Index 104 Available on-line at: utcrops.com/weeds/pdfs/2014weedcontrol-manual.pdf
2 Herbicide Resistance Confirmed in Palmer Amaranth in the Cotton Belt DNA herbicides (Treflan, Prowl): AR, SC and TN 1994 ALS Inhibiting herbicides (Staple): AR, SC and TN Glycine Inhibiting herbicide (Roundup): GA and NC 2008 PS II Inhibiting herbicides (Atrazine): GA???? Liberty and PPO herbicides
3 1.Use a hooded application New Herbicide Trait Technology Roundup Xtend Soybean tolerance to glyphosate + dicamba Asgrow, Pioneer, NK others - eta 2015 MGI Soybean tolerance to mesotrione (Callisto) + glufosinate (Liberty) + isoxaflutole (Balance) NK others - eta 2015 Stacked with dicamba and glypyhosate eta 2017
4 New Herbicide Trait Technology Balance Bean Soybean tolerance to glyphosate + isoxaflutole Enlist Soybean tolerance to 2,4-D + glufosinate (Liberty) + glyphosate Mycogen, Others? eta Use a hooded application
5 New Herbicide Trait Technology Roundup Xtend Soybean Only labeled dicamba products that can be used are Roundup Xtend or Engenia Will be able to use 1lb of Dicamba pre plant or pre and two 0.5 lbs post. Dicamba tankmixed with another pre will provide more consistent Palmer control than exists today Dicamba can be used post but so can currently used post products and they should work better because the pre worked
6 New Herbicide Trait Technology Roundup Xtend Soybean Probably be the dominate technology Get there first with the most Lined up with Asgrow/Pioneer/NK/others
7 New Corn Herbicide Bicyclopyrone Syngenta HPPD inhibitor (Callisto) A little better grass control than Callisto; Broadleaf control is similar Will only be sold in premixes ETA 2015
8 New Grain Sorghum Herbicide Huskie Bayer Pyrasulfotole (HPPD) + Buctril Apply 3 lf up to 30 and/or flag leaf 12.8 to 16 oz/a Can be tankmixed with atrazine, etc Also labeled in wheat 11 to 15 oz/a 1 st true leaf to flag leaf
9 Fluridone - History 1970s Fluridone and Norflurazon (Zorial) Zorial received cotton label as it was better on large seed broadleaves and less expensive to produce Fluridone showed good pigweed residual control Pigweed not an issue in the 70s Fluridone became aquatic herb-sonar
10 Fluridone - History Fluridone revisited 2012 Research in AR/TN/MS/GA/NC/SC showed great cotton safety Inconsistent Palmer residual control Needs a good 0.75 to become active Sec 18 in AR in 2012 expensive and inconsistent Palmer control
11 Fluridone Brake F2 Premix with fomesafen (low rate bridge to get fluridone activated) Brake at 1 pt/a - fluridone (0.2 lbs) + fomesafen (0.125 lbs) (8 oz Reflex) Provided consistent Palmer residual control in 2013 Got a Sec 18 in SC in 2013 Good results
12 Palmer amaranth Response 28 DAT Prowl Dual Mag Zidua Brake + Zidua Brake + Reflex Brake + Cotoran Brake (0.35) Brake (0.22) Cotoran + Caparol Caparol Cotoran Reflex Warrant D BC ABC BCD AB ABC ABCD A A A AB AB AB % Control
13 Prowl Dual Mag Zidua Brake + Zidua Brake + Reflex Brake + Cotoran Brake (0.35) Brake (0.22) Cot+Cap Caparol Cot EF Reflex Warrant Cotton Injury 28 DAT DE DE CDE CDE CDE CDE BCD BCD ABC ABC % Injury AB A
14 Prowl Dual Mag Zidua Brake + Zidua Brake + Reflex Brake + Cotoran Brake (0.35) Brake (0.22) Cotoran +Caparol Caparol Cotoran Reflex Warrant Untreated F Cotton Yield EF EDF EDF BCDE EDF CDE ABCDE ABCDE ABCD ABC AB ABC Seed Cotton (lb/a) A
15 Brake F2 Palmer Amaranth Control - Georgia 2013 Jackson Moultrie 2011 Treatment 41 DAA 59 DAA % Control Brake F2 1 pt 99a 93a Reflex 1 pt + Warrant 3 pt 96a 93a Jackson Macon2011 Treatment 22 DAA 35 DAA % Control Brake F2 1 pt 91a 74a Reflex 1 pt + Warrant 3 pt 97a 85a
16 Fluridone Brake F2 GA/TN/NC have applied for Sec 18 for limited acres in acres Really be a large research trial in 2014 Recrop with 16 oz rate: Soybean/wheat 4 months; corn 10 months Brake F2 Price?
17 Pyroxasulfone Experimental herbicide from Kumiai Better residual for pigweeds than Dual Magnum Weaker residual on nutsedges and grasses Tankmixed with a PPO herbicide (Valor, Authority, Sharpen, etc.) Palmer residual comparable to Prefix Caused some stunting when mixed with PPO herbicide in our research
18 Pyroxasulfone Kumiai marketing this herbicide through 3 companies BASF Sold alone: Zidua FMC Sold as a tankmix with Cadet: Anthem Valent Sold as a tankmix with Valor: Fierce Labeled on corn now.soybeans???
19 Residual Palmer Control with Fierce Jackson TN 2011 Treatment 20 DAA 26 DAA 34 DAA Authority First 3.2oz 96a 88bc 78c Canopy 4 oz 82bc 66d 58ab Fierce 3 oz 98a 99a 80bc Fierce 4.5 oz 99a 99a 92a Optill 2 oz 91ab 85c 75c Prefix 32 oz 99a 99a 94a Valor XLT 3 oz 97a 93abc 85abc Valor SX 2 oz 77c 71d 60d
20 Residual Palmer Control with Zidua Jackson TN 2011 Treatment 14 DAA 27 DAA Zidua 2.5oz 98a 78b Sharpen 1.0 oz 99a 54c Dual Magnum 1.33 pt + Sharpen 1 oz 99a 75b Zidua 2.5oz + Sharpen 1 oz 99a 77b Zidua 5 oz + Sharpen 1 oz 99a 92a Zidua 2.5oz + Verdict 5 oz 99a 77b Zidua 1.5 oz + Valor SX 2 oz 98a 79b Valor SX 2 oz 99a 92a
21 2 oz Valor Pre fb Roundup PM 32 oz Post
22 Zidua 5 oz + Sharpen 1 oz fb Roundup PM 32 oz Post 7 days after application
23 4.5 oz Fierce Pre fb Roundup PM 32 oz Post
24 32 oz Prefix Pre fb Roundup PM 32 oz Post
25 Pyroxasulfone Soybean Injury Jackson TN 2011 Treatment 20 DAA 30 DAA Authority XL 4 oz Anthem 6 oz Fierce 3 oz Fierce 3.75 oz Fierce 4.5 oz Zidua 2.5 oz 5 0 Zidua 5 oz + Sharpen 1 oz 15 0 Prefix 32 oz 0 0
26 3 oz Fierce Pre fb Roundup PM 32 oz Post
27 3 oz Fierce Pre Injury
28 Cover Crops All cover crops with good stands have provided good control of horseweed Palmer control: Cereal rye > Wheat > C. Clover > Vetch North Central Weed Science Society 2013 December 10, 2013
29 Palmer amaranth Control 14DBA Vetch Clover Fallow 100 Palmer Control (%) A B C Cover Type Pr>F = LSD = 15.17
30 Palmer amaranth Control 7DAA Vetch Clover Fallow 100 Palmer Control (%) B AB A Cover Type Pr>F = 0.05 LSD = 11.26
31 Plant Height V-7 Vetch Clover Fallow Plant Height (cm) A B C Cover Type Pr>F = < LSD = 8.25
32 Plant Height V-7 North Central Weed Science Society 2013 December 10, 2013
33 Plant Height V-14 North Central Weed Science Society 2013 December 10, 2013
34 Palmer amaranth Control 7DAA Palmer Control % A A Capreno Halex GT Roundup No-Herbicide Pr>F = < LSD = 13 B C
35 After Harvest Weed Control Steckel 2012
36 Methods and Materials Study was conducted 2012 in Jackson, TN. Herbicide treatments contained Gramoxone SL and NIS Burndown Applications Gramoxone SL Sencor Dual Magnum Sencor Dual Magnum Valor Sharpen Zidua Preemergent Applications Finesse Zidua
37 Palmer amaranth response Gramoxone SL + Zidua Gramoxone SL + Sharpen Gramoxone SL + Valor Gramoxone SL + Dual Magnum Gramoxone SL + Sencor Gramoxone SL + Dual Magnum fb Zidua ab a a a a a Gramoxone SL + Sencor fb Finesse Gramoxone SL b a % Control 14 DAT LSD=8.6
38 Wheat Yield Untreated Gramoxone SL + Zidua Gramoxone SL + Sharpen Gramoxone SL + Valor Gramoxone SL + Dual Magnum Gramoxone SL + Sencor Gramoxone SL + Dual Magnum Gramoxone SL + Sencor Gramoxone SL ab b ab b ab ab a ab ab Wheat Yield (bu/a) LSD=6
39 Questions?
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