Quick Facts
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Consistent, high-performance control in pulse and cereal crops
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Fast burndown plus extended residual control of kochia and other resistant weeds
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Tank-mix compatible with glyphosate for enhanced flexibility
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Target resistant biotypes of kochia, pigweed, lamb’s-quarters, cleavers, wild buckwheat and more
Supporting Documents
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Product Overview
Now registered for fall application. Authority Strike™ herbicide gives you reliable, one-pass weed control in front of pulse and cereal crops. It delivers a quick, effective burndown up front—and keeps working with extended control to stop weed escapes before they start next spring.
With two Group 14 actives, it takes down some of the toughest resistant weeds out there, including redroot pigweed, lamb’s-quarters, cleavers, kochia, and wild buckwheat. You can also tank-mix it with glyphosate for even broader burndown control.
Authority Strike™ herbicide requires moisture to activate. Spray Authority® brand herbicides as soil temperatures are cooling to 10° C or less but before soil freeze-up. The soil-applied herbicide removes emerged weeds late in the fall and is the extended residual is activated with snow melt the following spring, creating an active layer that is taken up by the roots and shoots of germinating weeds.
Its unique chemical characteristics mean it does not tie up with crop residue and does not volatilize into the air. Subsequent moisture events are required to maintain the herbicides in solution and remain available for weed uptake.
Labels and SDS
Crops
Chickpea
Target Control For Chickpea
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, redroot, smooth, tumble)
- Common purslane
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Common waterhemp
- Waterhemp (tall)
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Field Peas
Target Control For Field Peas
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, redroot, smooth, tumble)
- Common purslane
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Common waterhemp
- Waterhemp (tall)
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Flax
Target Control For Flax
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, redroot, smooth, tumble)
- Common purslane
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Common waterhemp
- Waterhemp (tall)
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Mustard
Target Control For Mustard
This product delivers effective control against the following:
- Lamb’s-quarters (up to 7.5 cm tall)
- Morning glory (up to 3 leaves)
- Nightshade (Eastern black, Black – up to 5 cm tall)
- Redroot pigweed
- Waterhemp (tall - up to 5 cm tall)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
Faba Bean
Target Control For Faba Bean
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, redroot, smooth, tumble)
- Common purslane
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Waterhemp (tall)
- Common waterhemp
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Soybeans
Target Control For Soybeans
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, redroot, smooth, tumble)
- Common purslane
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Common waterhemp
- Waterhemp (tall)
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Sunflower
Target Control For Sunflower
This product delivers effective control against the following:
- Carpetweed
- Cleavers
- Cocklebur
- Flixweed
- Jimsonweed
- Kochia (including Group 2 & 9 resistant biotypes)
- Lamb’s-quarters
- Morning glory
- Nightshade (Eastern black, black, hairy)
- Smartweed, Pennsylvania (seedling)
- Pigweed (prostrate, smooth, tumble)
- Common purslane
- Redroot pigweed
- Russian thistle*
- Shepherd’s-purse
- Stinkweed
- Tansy mustard
- Velvetleaf
- Volunteer canola (including glyphosate tolerant)
- Waterhemp (tall)
- Common waterhemp
- EC - Cleavers*
- EC - Eastern black nightshade
- EC - Groundsel (common)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
- EC - Lamb’s-quarters
- EC - Crabgrass (large, smooth)
- EC - Pigweed (powell, redroot)
- EC - Purslane (common)
- EC - Waterhemp (common)
- EC - Wild buckwheat
- EC - Yellow woodsorrel
Spring Wheat
Target Control For Spring Wheat
This product delivers effective control against the following:
- Lamb’s-quarters (up to 7.5 cm tall)
- Morning glory (up to 3 leaves)
- Nightshade (Eastern black, Black – up to 5 cm tall)
- Redroot pigweed
- Velvetleaf
- Waterhemp (tall - up to 5 cm tall)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
Durum Wheat
Target Control For Durum Wheat
This product delivers effective control against the following:
- Lamb’s-quarters (up to 7.5 cm tall)
- Morning glory (up to 3 leaves)
- Nightshade (Eastern black, Black – up to 5 cm tall)
- Redroot pigweed
- Velvetleaf
- Waterhemp (tall - up to 5 cm tall)
- EC - Kochia (including Group 2 & 9 resistant biotypes)
EC = Extended Control
Full crop listing
- Chickpea
- Field Peas
- Flax
- Mustard
- Faba Bean
- Soybeans
- Sunflower
- Spring Wheat
- Durum Wheat
- Alberta
- Saskatchewan
- Manitoba
- British Columbia
Product Specifications
Tech Specs
Chemical Group: Group 14
Registered tank mixes:
- Aim® EC herbicide + glyphosate
- CF herbicide (on registered crops)
- Glyphosate
Timing: Spray Authority Strike™ herbicide in fall when soil temperatures have cooled to 10° C or less but before soil freeze-up.
Application information:
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Apply after any heavy harrowing or tillage event.
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If higher disturbance seeding, consider a spring post-seed application.
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Clean out tank after using Authority Strike™ herbicide. When spraying Authority Strike™ herbicide for multiple days, at the end of each day, rinse tank with water and leave 1/3 full of water overnight
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Do not apply Authority Strike™ herbicide to fields treated with products containing sulfentrazone in the previous year
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Do not apply to soils classified as coarse-textured soils
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Do not apply in any type of soil with organic matter lower than 1.5% or greater than 6%
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Do not use on soils with a pH of 7.8 or greater
Rates & Packaging:
Rates:
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113 mL/ac (40 ac/jug) for cereals and mustard
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161 mL/ac (28 ac/jug) for pulses and oilseeds
Packaging:
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4 x 4.52 L jugs per case
Water volume:
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10 US gal/ac (100 L/ha) provides best uniform soil coverage with medium to coarse droplet sizes
Mixing instructions: Fill spray tank one-half to two-thirds full of water. With agitator operating, add the recommended amount of ingredients using the WAMLEGS order.
Rotational intervals and crops:
Any time: Chickpea, faba bean, field pea, flax, soybean, sunflowers, Low rate only - mustard, wheat (spring and durum)
4 months: Winter wheat
12 months: Alfalfa, barley, canola, field corn, oats, high rate – mustard, wheat (spring and durum)
24 months: Lentils, sweet and popcorn, sorghum
Always read and follow label instructions. Member of CropLife Canada.
FMC, the FMC logo and Aim and Authority are trademarks of FMC Corporation or an affiliate.
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