2017 Herbicide/Weed Issues and Updates. Rich Zollinger NDSU Extension Weed Specialist

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1 2017 Herbicide/Weed Issues and Updates Rich Zollinger NDSU Extension Weed Specialist

2 New Herbicides for 2017 No new MOA active ingredients.

3 Herbicide update and changes for 2017 See page 135

4 Discontinued herbicides / Achieve Liquid Axial TBC Assert Avenge FirstStep Paramount Puma Priority Rezult Pursuit Plus Propel Spartan Advance Radius 2016 Rage D-Tech Rely 200 Lasso Sencor Slider BroadAxe Rattler Plus TNT Broadleaf Gangster Rifle Plus TopNotch Rezult Shotgun Unity Sortie Vista

5 Discontinued herbicides 2017: Accolade, Bayonet 2, Brazen, Buctril, Certainty, Clearfield Max, Curio, Expert, FireFox, G-Max Lite, Gramoxone Inteon, Guardsman Max, Hardball, Imperium, Journey, PowerPlay, Pulsar, Require Q, Sahara, Stanza, Stout, Telar, Tie Down, Wolfpack Advanced, Zemax. Some bromoxynil/bromoxynil + MCPA/2,4-D products, Glyphosate products sold by Syngenta (Touchdown products and Traxion),

6 Name change: 2017 Brand Names Alluvex (Dupont) = Lead Off (Dupont) Thifensulfuron + rimsulfuron in corn Formulation change: Old - Anthem (FMC) = fluthiacet + pyroxasulfone New - Anthem Maxx = fluthiacet + pyroxasulfone SC Garlon (triclopyr-ester) = Vastlan (triclopyr-choline) Valor SX (51WDG) = Valor EZ (4SC) (2 oz/a WDG = 2 fl oz/a SC)

7 2017 Small Grain Herbicides - Avadex MA 10G (Gowan) = same ai (triallate) as Far-Go - Anthem Flex (FMC) - Zidua + Aim 2 to 4.5 fl oz/a PRE through 4 th -tiller (pre control only) Not for durum or barley Foxtail, pigweed, small-seeded bdrlf weeds Control resistant foxtail

8 2017 Small Grain Herbicides Talinor (Syngenta) Registration Pending Bromoxynil (Group 6) + Bicyclopyrone (Group 27) + safener 13.7 to 18.2 fl oz/a 2-leaf to pre-boot Kochia + most annual broadleaf weeds

9 2017 Small Grain Herbicides Quelex (Dow) Florasulam & halauxifen (new Group 4 ai) Orion = florasulam 0.75 oz WDG/A Controls some broadleaf weeds Follow crop rotation restrictions

10 2017 Small Grain Herbicides Teammate (Dow) - Registration pending Pyroxsulam & safener Pyroxsulam = PowerFlex HL 1 oz WDG 3-leaf to prior to jointing Controls many grasses Apply with many wheat herbicides Not for barley

11 2017 Corn Herbicides Acuron Flexi (Syngenta) Dual + Callisto + bicyclopyrone = Acuron without atrazine 2 to 2.25 qt/a Soil or EPOST up to 12 inch corn Bicyclopyrone improves large-seeded bdlf weeds Reduced crop rotation restrictions by omitting atrazine

12 2017 Corn Herbicides DiFlexx Duo (Bayer) Dicamba & Laudis & cyprosulfamide safen 24 to 40 fl oz/a Broadleaf and some grass weeds Soil or POST up to 36 inches

13 Resicore (Dow) 2017 Corn Herbicides Surpass + Callisto + Stinger 2.25 to 3 qt/a Soil or EPOST up to 11 inch corn Controls most grass and broadleaf weeds

14 2017 Soybean Herbicides Zidua Pro (BASF) Zidua + Sharpen + Pursuit Soil-applied 4.5 oz WDG contains 3 fl oz Pursuit Controls most grass and broadleaf weeds Provides residual weed control

15 2017 Soybean Herbicides Flexstar (Syngenta) ND SLN label pending Previous use: East of Hwy 281 New use: West of Hwy 281 Benson, Bottineau, Burleigh, Dickey, Eddy, Emmons, Foster, Grant, Kidder, LaMoure, Logan, McHenry, McIntosh, McLean, Mercer, Morton, Oliver, Pierce, Renville, Rolette, Sheridan, Sioux, Stutsman, Towner, Ward, and Wells pt/a Do not apply to soil with OM >4%. Do not apply after June 20.

16 Question: Will new herbicide technology solve our weed problems?

17 Enlist and RU Xtend = New Technology Requires a different mind-set! Particle drift (including inversions) Volatilization Sprayer cleanout - contamination Misapplication

18 Soybean is x more tolerant to 2,4-D than dicamba? 100 X

19 2017 Dicamba Resistance Soybean Registered Herbicides: 1. Xtendimax 2.9SL dicamba-dga + VaporGrip 2. Engenia 5SL dicamba-bapma Registered Pending Herbicides: 1. RU Xtend = glyphosate-mea + dicamba-dga + Vapor Grip 64 fl oz/a = 1 pt/a + glyt at 1 lb ae/gal 2. FeXapan (Dupont) = XtendiMax + Vapor Grip

20 15 Points about DR/DT Soybean Must read prior to application 2. Dicamba formulations - Low volatility not NO-volatility 3. XtendiMax with Vapor Grip - Vapor Grip = >5.5 solution ph = no dicamba acid 4. Rates 22 fl oz/a of XtendiMax - No less than 22 fl oz/a for all applications 5. Timing on DR soybean PRE to R1 - PRE to R1 soybean

21 15 Points about DR/DT Soybean 6. Broadleaf crop susceptibility to drift - Refer to page 76 for list 7. Non-DR soybean susceptibility to dicamba - Older soybean = more susceptible 8. Buffer ft for 22 fl oz/a / 220 ft for 44 fl oz/a 9. NO AMS or ammonium adjuvants!!!!! 10. BMPs Volatile ammonium allows dicamba-acid to form - Many listed on page 28

22 12 Points about DR/DT Soybean 6. Timing on DR soybean PRE to R1 ND Weed Control Guide page 81: Relative susceptibility of crops from dicamba drift: Low susceptibility: small grain, canola, corn, flax, millet, triticale. Moderately susceptibility: alfalfa, buckwheat, potato, safflower, and tomato. Very high susceptibility: chickpea, dry bean, field pea, grape, lentil, sunflower, soybean, and sugarbeet.

23 15 Points about DR/DT Soybean 11. Meticulous sprayer clean-out - 1 soda cap dicamba/a = severe injury 12. Nozzle efficacy TT Fine/Med size droplet vs. Extra course droplet 13. Reversible binding to soil - Dicamba may volatilize after delayed rain event 14. High selection pressure on weeds - Kochia already resistant to dicamba

24 12 Points about DR/DT Soybean All users are solely responsible for damage - Grower uses at own risk Read (study) label meticulously *Don t read the label Don t use the technology Follow label perfectly

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