Skip to main content
Click to open menu
Click to close menu
Begin main content
Group 2 , 14


Use Authority® Assist herbicide as your foundational herbicide to control summer annual weeds like lambsquarters, pigweed, nightshade and kochia, and suppress foxtail, fall panicum, nutsedges and other invasive grasses.

Quick Facts

  • Multiple modes of action.
  • Excellent grass control.
  • Very soluble so it works well with light rain.
  • No pH restrictions, so there’s low risk for carryover to corn.
  • Complements low-cost, pre-grass herbicide in conventional soybean weed management programs.

Active ingredients

  • Sulfentrazone*
  • Imazethapyr*  


* Authority Assist herbicide contains 4 pounds of active ingredient per gallon of product (3.33 pounds a.i. of sulfentrazone and 0.67 pound a.i. of imazethapyr).

Product Overview

Small-seeded broadleaf weeds and grasses can steal yields from soybeans. Apply Authority Assist herbicide with Grass Assist as your foundation herbicide. It lowers the hammer on glyphosate-tolerant summer annual weeds like lambsquarters, pigweed, nightshade and kochia, as well as suppresses foxtail, fall panicum, nutsedges and other invasive grasses.


Authority Assist herbicide is registered for use on peanuts only in the following states: AL, AR, GA, LA, MS, NC, SC, TN and VA. 

Always refer to the product label for an official listing of crop usage, restrictions and precautions.

Full crop listing

  • Peanuts
  • Soybeans

State Registration

  • Alabama
  • Arkansas
  • Colorado
  • Delaware
  • Georgia
  • Iowa
  • Idaho
  • Illinois
  • Indiana
  • Kansas
  • Kentucky
  • Louisiana
  • Maryland
  • Michigan
  • Minnesota
  • Missouri
  • Mississippi
  • North Carolina
  • North Dakota
  • Nebraska
  • New Hampshire
  • New Jersey
  • Ohio
  • Oklahoma
  • South Carolina
  • South Dakota
  • Tennessee
  • Texas
  • Virginia
  • Wisconsin
  • West Virginia

Get in touch

Learn more about how to use our products and sign up to receive more information.