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Wheat Herbicide Rotation Restrictions to Soybean in Oklahoma

Herbicides can remain as a residual in the soil for extended periods affecting crop rotation options and the specific timing of those plantings. It is important to understand the rotational restrictions of the specific herbicide(s) that may be used and how it impacts crops the following season. While this document can be used as a guide to identify herbicides and their restrictions with soybean, growers should always check the labels regarding specific rotation intervals. This is specifically true where rotational restrictions are highly variability due to the influence of soil pH, soil texture, application rates or moisture received between application and planting.

 

Herbicides can be applied as single component or as pre-mixes (i.e. containing a combination of multiple herbicides). Herbicide pre-mixes can be a challenge, not only because there are potentially multiple modes of actions but rates of the individual herbicide might be different than when applying individual herbicide products.

 

Sulfonylurea-tolerant soybean help the soybean plant handle previously applied Sulfonylurea herbicides, often by shortening the rotation restriction following application.Often times this is critical for rotating wheat to soybean in a double-crop system where the time between application of wheat herbicides and soybean planting is limited. Additionally, the BOLT soybean trait provides improved tolerance to SU herbicides. However, while tolerance to the SU herbicides are provided with these traits rotational restrictions must be followed to minimize potential crop injury.

 

The tables below are a summary of common herbicides used in Oklahoma winter wheat and their rotation restrictions for soybean. Detailed information regarding use rate per acre and wheat application timing can be found in PSS-2786, Single Herbicides and Herbicide Premixes for Use in Winter Wheat. This information is meant to summarize this information, when questions or details regarding specific chemistries arise the individual label should be consulted.

 

Table 1. Common wheat herbicide pre-mixes, their chemical components, rotational restrictions to soybean, and any notes for application.

Premix Herbicide Component Herbicides MOA Soybean Rotational Restriction Notes
Affinity BroadSpec (FMC)
  • Thifensulfuron
  • Tribenuron
  • ALS inhibitor
  • ALS inhibitor
1-7 Days Time depends on rate applied.
Agility SG (FMC)
  • Dicamba
  • Thifensulfuron
  • Tribenuron Metsulfuron
  • Growth regulator
  • ALS inhibitor
  • ALS inhibitor
  • ALS inhibitor
4 Months STS and BOLT soybean only.
Ally Extra SG (FMC)
  • Thifensulfuron
  • Tribenuron
  • Metsulfuron
  • ALS inhibitor 
  • ALS inhibitor
  • ALS inhibitor
4 Months STS and BOLT soybean only. 
Anthem Flex (FMC)
  • Pyroxasulfone
  • Carfentrazone
  • Shoot inhibitor
  • PPO inhibitor
0-4 Months 4 month restriction for higher application rates.
Axiom DF (Bayer)
  • Flufenacet
  • Metribuzin
  • Shoot inhibitor
  • PS II inhibitor
0 Days  
Finesse Cereal and Fallow (FMC)
  • Chlorsulfuron
  • Metsulfuron
  • ALS inhibitor
  • ALS inhibitor
4 Months STS and BOLT soybean only.
Harmony Extra SG (FMC)
  • Thifensuulfuron
  • Tribenuron
  • ALS inhibitor
  • ALS inhibitor
7, 14 Days 14 days on light textured on soil pH >7.9
Huskie (Bayer)
  • Pyrasulfotole
  • Bromoxynil
  • HPPD inhibitor
  • PS II inhibitor
4 Months  
Kochiavore (WinField)
  • 2, 4-D
  • Bromoxynil
  • Fluroxypyr
  • Growth regulator
  • PS II inhibitor
  • Growth regulator
4 Months  
Orion (Syngenta)
  • Florasulam
  • MCPA
  • ALS inhibitor
  • Growth regulator
9 Months  
Quelex (Corteva/Dow)
  • Halauxifen
  • Floarsulam
  • Growth regulator
  • ALS inhibitor
3 Months In the event of cereal crop failure, no-till soybean may be planted 45 days after Quelex application.
Rave (Syngenta) Triasulfuron
Dicamba
  • ALS inhibitor
  • Growth regulator
11-36 months Time depends on genetics, moisture, and pH. Lower for STS/BOLT soybean with higher rain and lower pH.
Sentrallas (FMC) Fluroxypyr
Thifensulfuron
  • Growth regulator
  • ALS inhibitor
   
Starane (Corteva) Florasulam
Fluoxypyr
  • ALS inhibitor
  • Growth regulator
  Starane NXT has a 4 month restriction.
Starane Flex has a 9 month restriction.
Talinor (Syngenta) Bicyclopyrone
Bromoxynil
  • HPPD inhibitor
  • PS II inhibitor
10-12 Months Starane NXT has a 4 month restriction.
Starane Flex has a 9 month restriction.

 

Table 2. Common wheat herbicides, their chemical names, rotational restrictions to soybean and any notes for application.

Herbicide Common Name MOA Soybean Rotational Restriction Notes
Aggressor Quizalofop ACCase inhibitor 4 Months  
2,4-D Amine or Ester 2, 4-D Amine or Ester Growth regulator 30 Days  
Aim EC Carfentrazone PPO inhibitor 0 Days  
Ally XP Metsulfuron ALS inhibitor 4-22 Months 4 Months for STS and BOLT soybean
Amber Custom-Pak Trisulfuron ALS inhibitor 11-36 Months Shorter time for STS/BOLT soybean; other restrictions are associated with soil conditions and location
Axial XL Pinoxaden ACCase inhibitor 90 Days  
Beyond Imazamox ALS inhibitor 0 Days  
Broclean, Brox, 2EC, Moxy 2E Bromoxynil PS II inhibitor 30 Days  
Dicamba, Clarity Dicamba Growth regulator 14-28 Days Timeframe will depend on region and rainfall experienced between application and planting.
Everest 3.0 Flucarbazone ALS inhibitor 4-12 Months 4-6 months for STS/BOLT soybean. 6-12 months for non-STS soybean dependent on soil pH
Express Tribenuron ALS inhibitor 7 Days  
Glean XP Chlorsulfuron ALS inhibitor 4-14 Months 4 months for STS and BOLT soybean.
Harmony SG/Harmony GT Thifensulfuron ALS inhibitor 0 Days See comments above for Harmony Extra
Olympus Propoxycarbazone ALS inhibitor 4-12 Months 4 months for STS and BOLT soybean
Outrider Sulfosulfuron ALS inhibitor 3-12 Months 3 months for STS/BOLT soybean systems.
Osprey Mesosulfuron ALS inhibitor 90 Days  
Pre-Pare Flucarbazone ALS inhibitor 4-12 Months 4-6 months STS?Bolt Soubean, 6-12 months all other soybean; length of time dependent on soil pH
Powerflex HL Pyroxsulam ALS inhibitor 3 Months Avoid planting of soybean prior to April 30th
Metribuzin 75 DF Metribuzin PS II inhibitor 4 Months  
Zidua Pyroxasulfone Shoot inhibitor 0-4 MOnths 4 months for 4 ox.ac rate, otherwise no restrictions.
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