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Authority® Supreme is a group 14 and 15 soil-applied, pre-emergent herbicide that provides extended control on grassy and broadleaf weeds like green or yellow foxtail, downy/Japanese brome, suppresses resistant wild oats and controls kochia and cleavers. It has been tested in a wide variety of soil and environmental conditions over several years, and has been proven to perform consistently.





Quick Facts

  • Extended control of tough to kill grassy and broadleaf weeds
  • Apply pre-seed or up to three days after seeding with or without your glyphosate
  • Removes weeds early

Chemical Group: Group 14, Group 15. Registered and Supported Tank Mixes: Glyphosate Authority® Supreme herbicide can be mixed with one or more herbicide products, provided that the tank mix product labels do not prohibit such mixing. Tank mix Authority® Supreme herbicide with labelled rates of glyphosate (that are registered for the same uses). Timing: Authority® Supreme herbicide can be applied pre-plant or pre-emergence up to three (3) days after planting. Crop seeds must be planted a minimum of 2.5 cm deep for chickpeas, field peas, and soybeans. DO NOT apply Authority® Supreme herbicide if crop has emerged.

Application Timing Rate (mL/ac) of Authority® Supreme Herbicide
Setup Treatment (pre-plant or pre-emergence) 162 mL/ac (early season control only)
Residual Treatment (pre-plant or pre-emergence) 202 mL/ac (coarse/medium texture, O.M. 1-4%) 242 mL/ac (medium-fine/fine texture, O.M. 4-7%)

Application Timing Rate (mL/ac Crop Rotation:

Rotational Crop Replant Interval (Months)
Chickpea Anytime
Corn, Field 12
Field pea Anytime
Soybeans Anytime
Spring and durum wheat 12
Sunflowers 12
Winter wheat 4

  Application Information: Application early (pre-plant) increases activation potential by spring showers. Post-seed application should be considered in higher disturbance situations. Apply at 10 gal/ac for maximum soil coverage, using medium to coarse droplets. Apply at 33 or 40 ac/jug, based on timing and soil characteristics. Apply with or without glyphosate. Apply with glyphosate if weeds are actively growing. Authority® Supreme herbicide controls weeds germinating within soil barrier. Apply only once per 12 month period. Rates and Packaging: 2 x 8 L jugs per case. Each 8 L jug treats 33 or 40 acres per jug. Surfactant: N/A. Water Volume: 10 gal/ac provides best uniform soil coverage with medium to coarse droplet sizes. Rainfastness: Avoid application when heavy rain is forecast. Tank Mixtures: Fill spray tank one-half to two-thirds full with water. With agitator operating add the recommended amount of ingredients using the WAMLEGS order:

Wettable powders, dispersible granules, soluble granules (WG, DF, SG, WP, SP)

Agitate tank mix thoroughly

Micro-encapsulated suspensions (ME)

Liquid flowables and suspensions (SC, SL, SN, Li, SU, SE)

Emulsifiable concentrate formulations (EC)

Fill spray tank nearly full with water

Glyphosate formulations


Complete filling the spray tank to the desired level