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Single Herbicides and Herbicide Premixes for Use in Winter Wheat

Effective weed management is essential to improving the yield and quality of Oklahoma wheat. As herbicide resistant cases increase across the state, growers are forced to make more complicated weed management decisions. A useful strategy in managing or delaying resistance is the rotation of herbicides and use of herbicide premixes.

 

Applications of a single herbicide or herbicides having the same mode of action can be effective, but should be limited in a single growing season. Over-reliance on a single herbicide or mode of action places selection pressure on weed populations and may eventually select for resistant individuals. Management of resistant individuals is expensive as crop yield and quality decrease and money is spent on herbicides that are no longer working.

 

Herbicide premixes can be a useful strategy in resistance management. Effective mixtures broaden the spectrum of weed species controlled and often include more than one mode of action. The following two tables list several single herbicides and herbicide premixes. Before applying any herbicide, always consult the label for appropriate rates, tank-mix partners, plant-back intervals, geographic restrictions, spray carrier volumes, nozzles, and other special instructions.

 

Abbreviations:

lb = pound

ae = acid equivalent

gal = gallon

pt = pint

E or EC = emulsifiable concentrate

fl oz = fluid ounce

PRE = preemergence

oz = ounce

POST = post emergence

SG = soluble granule

EPOST = early postemergence

DF = dry flowable

 

Table 1. Single herbicides labeled for use in winter wheat.

Single herbicide (manufacturer) Common name Use rate per acre Herbicide mode of action Wheat application timing
2,4-D Amine or Ester (3.8 lb ae/gal) 2,4-D Amine or Ester 0.5-2 pt Growth regulator Only in spring (fully tillered) to pre-boot
Aim EC (FMC) Carfentrazone 0.5-2.0 fl oz PPO inhibitor PRE up to boot
Ally XP (DuPont) Metsulfuron 0.1 oz ALS inhibitor Hard dough to >10 days before harvest
Amber Custom-Pak (Syngenta) Triasulfuron 0.56 oz (PRE) or 0.28-0.56 oz (POST) ALS inhibitor PRE up to pre-boot
Axial XL (Syngenta) Pinoxaden 16.4 fl oz ACCase inhibitor 2 leaf to pre-boot
Beyond* (BASF) Imazamox 4-6 fl oz ALS inhibitor After tiller initiation to pre-jointing
Broclean, Brox 2EC, Moxy 2E, etc. (2 lb ae/gal) Bromoxynil 1.5-2 pt PS II inhibitor Emergence to boot
Dicamba, Clarity, etc. (4 lb ae/gal) Dicamba 2-4 fl oz Growth regulator PRE up to jointing
Everest 2.0 (Arysta LifeScience) Flucarbazone 0.50-1 fl oz ALS inhibitor 1 leaf to jointing
Express 50 SG (DuPont) Tribenuron 0.25-0.5 oz ALS inhibitor 2 leaf to pre-flag leaf
Glean XP (DuPont) Chlorsulfuron See label ALS inhibitor PRE or 2-leaf to pre-boot
Harmony SG (DuPont) Thifensulfuron 0.45-0.9 oz ALS inhibitor 2 leaf to pre-flag leaf
Olympus (Bayer) Propoxycarbazone 0.6 oz (PRE) or 0.6-0.9 oz (POST) ALS inhibitor Preplant up to pre-joint
Osprey (Bayer) Mesosulfuron 4.74 oz ALS inhibitor Emergence to jointing
Pre-Pare (Arysta LifeScience) Flucarbazone See label ALS inhibitor Preplant or PRE
PowerFlex HL (Dow) Pyroxsulam 3.5 oz ALS inhibitor 3 leaf to jointing
Metribuzin 75 DF Metribuzin See label PS II inhibitor 2 leaf to 4 tillers
Zidua (BASF) Pyroxasulfone See label Shoot inhibitor Delayed PRE or EPOST

*Only apply Beyond to Clearfield or Clearfield Plus wheat varieties.

SEVERAL OF THESE HERBICIDES REQUIRE OR RECOMMEND THE USE OF AN ADJUVANT. SEE THE ADJUVANTS SECTION FOR EACH LABEL.

 

Table 2. Premix herbicides for use in winter wheat.

Premix herbicide (manufacturer) Use rate per acre Component herbicides Herbicide mode of action Application timing
Affinity BroadSpec (DuPont) 0.4-1.0 oz Thifensulfuron ALS inhibitor 2 leaf to pre-flag leaf
    Tribenuron ALS inhibitor  
Agility SG (DuPont) 1.6-3.2 oz Dicamba Growth regulator 2 leaf to pre-joint
    Thifensulfuron ALS inhibitor  
    Tribenuron ALS inhibitor  
    Metsulfuron ALS inhibitor  
Ally Extra SG (DuPont) 0.3-0.5 oz Thifensulfuron ALS inhibitor 2 leaf to pre-flag leaf
    Tribenuron ALS inhibitor  
    Metsulfuron ALS inhibitor  
Anthem Flex (FMC) See label Pyroxasulfone Shoot Inhibitor PRE to pre-spike or
    Carfentrazone PPO inhibitor at spike up to 4 tillers
Axiom DF (Bayer) See label Flufenacet Shoot Inhibitor At spike to 2 leaf
    Metribuzin PS II inhibitor  
Finesse Cereal and Fallow (DuPont) 0.2-0.5 oz (Preplant and PRE) and 0.2-0.4 oz (POST) Chlorsulfuron ALS inhibitor Preplant, PRE, or 1 leaf to pre-boot
    Metsulfuron ALS inhibitor  
Harmony Extra SG (DuPont) 0.45-0.9 oz depending on weed pressure Thifensulfuron ALS inhibitor Preplant or 2 leaf to pre-flag leaf
    Tribenuron ALS inhibitor  
Huskie (Bayer) 13.5-15 fl oz Pyrasulfotole HPPD inhibitor 1 leaf up to flag leaf emergence
    Bromoxynil PS II inhibitor  
Orion (Syngenta) 17 fl oz Florasulam ALS inhibitor 3 leaf up to jointing
    MCPA Growth regulator  
Pulsar (Syngenta) 8.3-12.5 fl oz Dicamba Growth regulator Prior to jointing
    Fluroxypyr Growth regulator  
Rage D-Tech (FMC) See label (PRE) 8-16 fl oz (POST) Carfentrazone PPO inhibitor Preplant or 3 leaf up to jointing
    2,4-D Ester Growth regulator  
Rave (Syngenta) 2-4 oz Triasulfuron ALS inhibitor After emergence up to jointing
    Dicamba Growth regulator  

SEVERAL OF THESE HERBICIDES REQUIRE OR RECOMMEND THE USE OF AN ADJUVANT. SEE THE ADJUVANTS SECTION FOR EACH LABEL.

 

Misha R. Manuchehri
Weed Science Extension Specialist

 

Amanda de Oliveria Silva
Former Small Grains Extension Specialist

 

Victor R. Bodnar
Graduate Research Assistant

 

Josh Lofton
Cropping Systems Extension Specialist

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