Acuron Herbicide



Field corn (pre- or post-emergent to 6 leaf stage); Seed corn (pre-emergent only); ...

For management of

American nightshade; Eastern black nightshade; Canada fleabane (high rate only); ...

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Application Information

1.98 L/ ac (4.91 L/ha) – Pre-emergent (field, seed and sweet corn) and early post-emergent (field...

Water Volume

Pre-emergence - Apply in a minimum of 16 US gal/acre (150 L/ha) of carrier (water or UAN) Post-...
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application info

Tank Mixes

Post-emergent: Roundup brand glyphosate-only herbicide at 0.67 L/acre (1.67 L/ha).

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tank-mixes info

Technical Information

Chemistry Group

Group 5, 15 and 27

Active ingredients

Bicyclopyrone, Mesotrione, S-metolachlor, and Atrazine

PHI: Field corn forage – 90 days Sweet corn ears – 50 days Sweet corn forage – 45 days Field corn grain and stover or Seed corn – harvest at maturity
REI: 12 hours. 12 days for hand setting irrigation equipment

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technical info

About this Product

Multi-targeted control of difficult weeds in corn

Weed control is an integral component in a corn yield management system. Help improve your crop’s yield potential by keeping fields clean. Acuron® herbicide combines four active ingredients with three complementary modes of action for control of broadleaf and grass weeds in corn.

Product Benefits

  • Helps achieve corn’s yield potential by keeping fields clean
  • Built-in resistance management with four active ingredients and three modes of action
  • Combines the active ingredients in Lumax® EZ with bicyclopyrone for enhanced activity against lambsquarters, common ragweed, and adding the suppression of proso millet
  • Flexible application timing from pre-emergent to the 6 leaf stage of corn


Cases of 2 x 10 L jugs
450 L totes


For use on:

  • Field corn (pre- or post-emergent to 6 leaf stage)
  • Seed corn (pre-emergent only)
  • Sweet corn (pre-emergent only)

For management of:

Acuron combines the active ingredients in Lumax® EZ herbicide with bicyclopyrone, providing enhanced activity against lambsquarters, common ragweed, glyphosate resistance Canada fleabane and waterhemp, and adding suppression of proso millet.

Comparing Acuron to Lumax EZ – applied pre-emergence

Bar chart showing improved weed control with Acuron

Data from Syngenta research trials conducted between 2012 and 2016 (# trials)
Performance evaluations are based on field observations and Syngenta field trial data over a limited geography and time. Data from multiple years should be consulted whenever possible. Individual results may vary depending on local growing, soil and weather conditions.

Application Information

Use Rates

1.98 L/ ac (4.91 L/ha) – Pre-emergent (field, seed and sweet corn) and early post-emergent (field corn ONLY; from planting up to and including to 6-leaf).

1.6 L/ac (4.0 L/ha) – Pre-emergent or post-emergent (field corn ONLY) up to and including 6-leaf corn

Water Volume

Pre-emergence - Apply in a minimum of 16 US gal/acre (150 L/ha) of carrier (water or UAN)
Post-emergence - Apply in a minimum of 16 US gal/acre (150 L/ha) of water

Application Method


Application Information

  • Apply prior to proso millet emergence and before other grass weeds exceed the 2-leaf stage.
  • Nitrogen solutions (such as 28-0-0 UAN), excluding suspension fertilizers, may replace water as a carrier for pre-emergent application only. DO NOT use nitrogen solutions as a carrier to corn that has emerged.
  • When low volumes of spray are applied, complete coverage and thorough application are essential for most effective results.
  • No adjuvant is required. 

Mixing Order

WALES Symbol: L

  1. Ensure that the sprayer is totally clean.
  2. Fill the sprayer half full with water. Engage gentle agitation. All return lines to the spray tank must discharge below the liquid level.
  3. Ensure that the agitation system is working properly and that it creates a rippling or rolling action on the water surface.
  4. Add ACURON Herbicide slowly and agitate until completely dispersed. To ensure complete dispersion, wait 2 or 3 minutes after Acuron herbicide has been added to the tank.
  5. Fill the tank to three quarters full with water.
  6. Add the glyphosate-containing tank-mix partner, if required.
  7. Continue agitation while completing the filling of the sprayer with water.
  8. Always ensure that agitation is maintained until spraying is completed, even if stopped for brief periods of time. Reduce agitation once tank volume is reduced to about one third of capacity.
  9. If agitation is stopped for more than 5 minutes, re-suspend the spray solution by running on full agitation prior to spraying. Acuron herbicide must be sprayed the same day as mixing. Do not allow spray solution to remain in tank overnight.
  10. Do not mix, load or clean spray equipment where there is a potential to contaminate wells or aquatic systems.

Effects of Weather

  • With pre-emergent applications, 10-12mm (1/2") of rain in one event is required within 7-10 days or use of a rotary hoe is necessary.
  • Dry weather conditions as well as excessive rainfall or irrigation following application may reduce weed control.
  • Temporary crop injury (bleaching) may occur under extreme weather conditions or when the crop is under stress.

Use Restrictions

  • Do not apply to emerged seed corn or sweet corn.
  • Do not apply by air.
  • One application per year.
  • No adjuvant required.
  • Do not mix with ammonium sulphate (AMS).
  • DO NOT apply any other mesotrione containing products to fields treated with Acuron herbicide in the same year.
  • One application of Acuron herbicide provides 0.589 kg a.i./ha of atrazine. Do not apply more than 1.5 kg a.i./ha of atrazine per year either as a pre- or post-emergent application before corn reaches 30 cm in height. An additional treatment of a product containing atrazine can be made as long as the amount of atrazine applied does not exceed 0.911 kg a.i./ha
  • Do not plant dry edible (white) beans or soybeans in fields in which soil is greater than 70% sand and which have received an Acuron application the previous year (see crop rotation notes below).
  • Do not make a foliar post-emergent application of any organophosphate or carbamate insecticide within 7 days before or 7 days after an Acuron herbicide application or severe corn injury may occur. 
  • Severe corn injury and crop yield loss may occur if Acuron herbicide is applied to corn crops that are treated with Lorsban™.
  • See label for a full list of use restrictions and additional product information

Crop Safety

Do not plant any crop other than corn in the same year on land treated with ACURON Herbicide as injury may occur.

Acuron herbicide may be used pre-emergent or post-emergent on field corn and pre-emergent in production seed corn and sweet corn. Not all seed corn inbreds and sweet corn varieties have been tested; the use of Acuron herbicide must be approved by the seed company and comply with the directions given by the seed corn company.

Minimum Crop Rotation Intervals:

To avoid injury to subsequent crops after an application at the recommended rate of Acuron herbicide, the following recropping intervals should be observed.

  • Field Corn, Production Seed Corn, Silage Corn and Sweet Corn - no restriction
  • Winter Wheat - 4.5 months
  • Spring Wheat - 10 months
  • Soybeans (except on sand or loamy sand soils) - 11 months
  • Soybeans on sand or loamy sand soils – bioassay (after 12 months)
  • All other crops – bioassay (after 12 months)

Although ACURON Herbicide has a flexible recropping profile, certain crops may be sensitive to low concentrations in the soil. Therefore, careful consideration should be given to crop rotation plans prior to using ACURON Herbicide.

Tank Mixes


Roundup brand glyphosate-only herbicide at 0.67 L/acre (1.67 L/ha).

Technical Information

Chemistry Group

Group 5, 15 and 27

Mode of Action

  • Bicyclopyrone and mesotrione (Group 27) inhibit target weeds’ ability to protect chlorophyll, leading to a ‘bleaching’ effect when the plant is exposed to sunlight
  • Atrazine (Group 5) interferes with photosynthesis and disrupts plant growth
  • S-metolachlor (Group 15) inhibits cell growth and division

Resistance Management

For resistance management, Acuron herbicide contains Group 5, 15 and 27 herbicides. Any weed population may contain or develop plants naturally resistant to Acuron herbicide and other Group 5 and/or 15 and/or 27 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.

Labels & MSDS

Disclaimer – ALWAYS read and follow label directions. Please use this information above only as a guideline and not an exact description.

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