Herbicide residue consideration

When selecting a field to grow mustard, particular attention should be paid to the previous use of herbicide and any applicable re-cropping restrictions. The list of products and the length of cropping restrictions can be found in the following table. Be sure to cross-reference with the product label as well as the current Saskatchewan Agriculture Guide to Crop Protection for the most up-to-date information. Note that some products may have additional considerations for certain years during or following excessively dry conditions; make sure you are aware of increased carry-over risk for products used prior to the mustard crop. If applicable, products will include details about moisture thresholds and additional re-cropping restrictions.

ProductSpecial considerations Years1
Metsulfuron (Ally, Accurate, also a component of Express Pro)-4
Ethametsulfuron
(Muster Toss N Go)		 Muster Toss N Go is registered for use in brown and oriental mustard from the four-leaf stage up until flowering. However, brown and oriental mustards are not tolerant to Muster Toss N Go applications prior to the four-leaf stage.2
Imazamox (Solo)
+fluroxypyr (Altitude FX2)
+clopyralid, Lontrel Dry (Tensile)
+bentazon (Viper)
Tensile is no longer produced but may still be in distribution system. 2
Florasulam/fluroxypyr+MCPA
(Outshine)		Not applicable2
1 Years refers to the number of winters that must pass between application and seeding of mustard.

Mustard may be seeded the year after application of the following herbicides or co-pack combinations of those herbicides:

  • All Group 1 grass control herbicides
  • 2,4-D 
  • 2,4-DB 
  • Aim/CleanStart 
  • Avadex
  • Axial Xtreme 
  • Barricade II 
  • Basagran brands 
  • Broadband
  • Bromoxynil 
  • Bromoxynil/ 2,4-D 
  • Bromoxynil/ MCPA 
  • Dicamba (cereal rates) 
  • Dicamba/mecoprop/MCPA 
  • Dichlorprop/2,4-D 
  • Eclipse 
  • Enforcer D or M 
  • Eptam 
  • Florasulam/Fluroxypyr +MCPA (Stellar, Stellar XL only) 
  • Fluroxypyr + 2,4-D 
  • Fluroxypyr + MCPA 
  • Heat  
  • Kerb  
  • Korrex  
  • Liberty  
  • Lontrel  
  • MCPA  
  • MCPB/MCPA  
  • Mecoprop  
  • Paradigm  
  • Pinnacle  
  • Pixxaro  
  • Prestige XC
  •  Pulsar  
  • Retain  
  • Salute  
  • Simplicity  
  • Tandem  
  • Thifensulfuron/tribenuron  
  • Tribenuron  
  • Triton K  
  • Varro  

Herbicides not listed above have no recommendation for re-cropping to mustard. In many cases this means that a successful bioassay (strip of mustard grown in the field without injury symptoms) must be grown to determine safety before seeding the entire field to mustard. Contact the manufacturer of products not noted above for further information.

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