Spectrum provides exceptional control of dandelion, thistle and hemp-nettle in cereals.

Selective control

For your worst broadleaf weed problems in cereals.

Two unique active ingredients

Contains Group 2 and 4 actives to deliver a hard-hitting solution.

Early application

Apply as early as the 2 leaf crop stage.


Below lists the crops that Spectrum herbicide can be used on.


Barley (Hordeum vulgare ssp. vulgare)


Oat (Avena spp.)


Wheat, Durum (Triticum durum)

Wheat, Spring Seeded (Triticum spp.)


Now registered in the following provinces:

  • Registered
  • Unregistered

Technical Specifications

  • Application Method
    Aerial: Not registered for aerial application.
  • Approved Use
    Refer to the Spectrum label for complete use instructions.
    Refer to the Controlled Weeds list for the full list of weeds.

    Weeds controlled
    • Dandelion (<15 cm diameter)
    • Perennial sow thistle (top growth only)
    • Volunteer canola (all varieties)
    Weeds suppressed
    • Dandelion
    (>15 cm diameter; overwintered rosettes;
    mature plants) - and more (see label)
  • Rates
    • 20 ac/case
    • Water volume
    - Ground 40 L/ac (10 US gal/ac)
    - Aerial not registered
  • Application Timing
    • Crop stage: 2 - 6 leaf
    • Weed stage: 1 - 4 leaf

    Rainfast: 4 Hours
  • Crop Rotation
    Barley - Oats -Summer foallow - Canola - Peas* - wheat * ​For pea rotation, rainfall from June 1 to Aug 31 in the year of the application must be greater than 140 mm (5.5 inches) and annual rainfall must be greater than 175 mm (6.9 inches)
  • Mixing Instructions
    When mixing you will use step 5 or step 8 but not both.
    1) Fill the spray tank with ½ to ¾ of the required amount of water.
    2) Continue agitation throughout the mixing and spraying procedure.
    3) If water conditioner is required, add now.
    4) Add any tank-mix partners that are a dry formulation.
    5) If using an oil dispersible grassy weed tank-mix partner (such as Simplicity) add now.
    6) Add the required amount of Spectrum A.
    7) Add the required amount of Spectrum B.
    8) Add the required amount of grassy weed tank-mix partner if not using an oil dispersible formulation.
    9) Add any required adjuvant or surfactants.
    10) Complete filling the sprayer tank with water.
    Note: Do not mix undiluted herbicides in the chem-handler.
  • Herbicide Group

    Group 2

    Group 4

  • Grazing

    • Livestock may graze treated areas 7 days after application.

    • Withdraw meat animals from treated areas at least 3 days before slaughter.

    • Allow 7 days after application before cutting hay or harvesting forage.

    • Mature crops may be harvested 60 days after application.

  • Tank Mixes

    • Assert™

    • Axial™

    • Everest™

    • Simplicity™ GoDRI

  • Additional Information

    Performance Inquiry Guidelines

    Corteva encourages contact within the timelines listed for proper field assessments to resolve and rectify the call.


    After these deadlines, it is difficult to determine the circumstances leading to non-performance.


    Seed - Days After Use - Within 21 days (after crop emergence)

    Pre-emergent herbicides - Days After Use - Within 21 days (after crop emergence)

    Post emergent herbicides - Days After Use - Within 21 days after treatment

    Pre-seed herbicides - Days After Use - Within 21 days after treatment

    Pre-harvest or post harvest - Days After Use - Within 21 days after seeding – the following spring

    Fallow applications - Days After Use - Within 21 days after treatment

    Fungicides - Days After Use - 7 days after treatment

    Insecticides - Days After Use - 7 days after treatment


For more information, download the full label
Spectrum Herbicide Label.
Download MSDS
Spectrum Herbicide MSDS.
View Additional Resource Material
Herbicide Spectrum étiquette principale.
Herbicide Spectrum fiche signalétique.

Product Guide(PDF)

2019 West Field Guide

Before use and for complete product information, please read and follow label directions.