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Authority® Supreme herbicide / West

Want to give your crops extended 2-in-1 pre-emergent protection? Take control from the start with Authority® Supreme – a herbicide using dual modes of action to dominate even the toughest hard-to-control weeds.

Quick Facts

  • Early and extended control of tough to kill grassy and broadleaf weeds.
  • Apply pre-seed or up to three days after seeding – with or without glyphosate.
  • Dual modes of action provide a sound resistance management tool and an excellent option for herbicide layering

Labels And SDS

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Product Overview

Authority Supreme herbicide is a powerful pre-emergent tool that attacks weeds before they have a chance to harm your field pea, chickpea, and soybean crop. Its dual modes of action also help manage weed resistance, while providing effective control of a variety of broadleaf and grass weeds during a critical crop development period. Glyphosate and Aim® EC herbicide plus glyphosate can be tank-mixed for added protection.


Full crop listing

  • Field Peas
  • Chickpea
  • Soybeans


  • Alberta
  • Saskatchewan
  • Manitoba
  • British Columbia

Product Specifications

Tech Specs

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Registered and Supported Tank Mixes:

Authority Supreme can be mixed with glyphosate products (that are registered for the same use), as well as Aim® EC herbicide plus glyphosate. 

Application information:

Authority Supreme herbicide is applied at a rate of 10 gallons per acre (100 L/ha) for maximum soil coverage, using medium to coarse droplets. For residual or extended control, apply at 33 or 40 acres per jug based on timing and soil characteristics. Spring showers increase activation potential in the early (pre-plant) season. Post-seed application should be considered in higher disturbance situations. 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.

Water volume: 10 gal/ac provides best uniform soil coverage with medium to coarse droplet sizes.

Rainfastness: N/A

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.

Rotational intervals and crops:

Any time: Soybean, chickpeas, field peas 

4 months: Winter wheat

12 months: Barley, canola, field corn, mustard, oats, spring and durum wheat, sunflowers

24 months: Lentils

36 months: Sugar beets

Trial Data

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Authority Supreme Comparison

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