Assure™ II


When you’re growing a high-potential crop, the last thing you want is the previous year’s crop coming back to make trouble. AssureTM II herbicide gets volunteer corn, volunteer cereals, foxtail barley, quackgrass and many other grassy weeds in soybeans, canola, pulses and other crops.

Ask an Agrologist


AssureTM II herbicide controls a wide range of volunteer and grassy weeds in pulse, oilseed and soybean crops.

Dependable grass control

Assure II is a Group 1 product and offers a wide window of application on weeds such as foxtail barley, green foxtail, yellow foxtail, volunteer barley, volunteer corn, volunteer oats, volunteer wheat, wild oats, barnyard grass, fall panicum, old witchgrass, proso millet and quackgrass.

Control volunteer corn in soybeans

In Eastern Canada, Assure II offers superior* control of volunteer corn control (including glyphosate-tolerant corn) in soybeans, alfalfa, lima beans, adzuki beans, mung beans, canola, dry common beans, flax, sugarbeets, snap beans, rutabagas and industrial hemp. * Based on Ontario trials conducted in 2003 by Dr. Peter Sikkema, University of Guelph.

Now registered to control foxtail barley

In the Prairie provinces, look to Assure II for exceptional effectiveness on these same weeds in canola, chickpeas, lentils, peas (field and processing), soybeans, creeping red fescue for seed production, dry common beans, flax, industrial hemp (fibre production only), seed alfalfa, seedling legumes (seed production), camelina, snap beans and sugar beets.

Crop safety

Excellent crop safety and wide window of application.


Below lists the crops that Assure II herbicide can be used on.


Alfalfa, For Seed (Medicago sativa ssp. sativa)


Bean Yelloweye

Bean, Adzuki (Vigna angularis)

Bean, Blackeye

Bean, Browneye

Bean, Dry (All Types) (Fabaceae)

Bean, Dry (All Types) (Phaseolus vulgaris var. vulgaris)

Bean, Kidney (Phaseolus vulgaris var. vulgaris)

Bean, Lima (All or Unspecified) (Phaseolus lunatus var. lunatus)

Bean, Lima, Dry

Bean, Lima, Green (Phaseolus lunatus)

Bean, Lima, Succulent

Bean, Lima (Phaseolus lunatus var. lunatus)

Bean, Mung (Phaseolus spp)

Bean, Mung (Vigna radiata var. radiata)

Bean, Snap (Phaseolus spp.)

Bean, Snap (Phaseolus vulgaris var. vulgaris)

Bean, White


Beet, Sugar, For Seed (Beta vulgaris ssp. vulgaris)

Beet, Sugar (Beta vulgaris ssp. vulgaris)


Canola, For Seed (Brassica spp.)

Canola (Brassica spp.)


Corn, Field Silage, Seed Treatment (Zea mays ssp. mays)

Corn, Field, For Forage Fodder (Zea mays ssp. mays)

Corn, Field, For Seed (Zea mays ssp. mays)

Corn, Field, For Silage

Corn, Field (Zea mays ssp. mays)

Corn, For Seed (Zea mays ssp. mays)

Corn, Sweet (Zea mays ssp. mays)

Corn, Sweet (Zea mays)

Grain Corn


Cranberry (Vaccinium macrocarpon)


Flax (Linum usitatissimum)

Industrial Hemp


Lentil (Lens culinaris)


Pea (Pisum spp.)


Rutabaga (Brassica napus var. napobrassica)


Soybean (Glycine max)


Sunflower (Helianthus annuus)

Sunflower (Helianthus spp.)


Vegetables, Cucurbit (Cucurbitaceae)


Now registered in the following provinces:

  • Registered
  • Unregistered

Technical Specifications

  • Application Method

    Aerial Application: Assure II is registered for aerial application only when applied alone.

  • Approved Use

    Refer to the Assure II label for complete use instructions.
    Refer to the Controlled Weeds list for the full list of weeds.

    Weeds controlled
    0.2 L/ac rate
    • Wild oats(1)
    (1) 1-leaf to 5-leaf up to 2 tillers

    0.3 L/ac rate
    All weeds listed in the Controlled Weeds + Quackgrass*

  • Rates

    • 200 mL/ac to 300 mL/ac
    • Surfactant: Add Sure-Mix (included in the box) at 5 L per 1,000     L of spray solution (0.5% v/v). Use Merge® at 5 L to 10 L per 1     1,000   L of spray solution (0.5% v/v to 1% v/v) if Sure-Mix is not    available.
    • Water volume
    - Ground 40 L/ac (10 US gal/ac)

  • Application Timing

    Assure II can be safely applied almost any crop stage.
    Apply Assure II when grasses are between 2-leaf and early tillering stage.
    Follow the pre-harvest interval guidelines.

    Window of Application
    It is important to time the application of Assure II to the weed staging since Assure II can be safely applied at almost any stage of the crop.

    Application Information
    Apply to volunteer corn and quackgrass at the 2-leaf to 6-leaf stage and when other labeled weeds are at 2-leaf stage to early tillering stage.

    Rainfast :
    - 1 hour

  • Crop Rotation
    Any crop the following year.
  • Mixing Instructions
    1. Make sure that spray tank is thoroughly cleaned before mixing.
    2. Fill tank half full with water. Keep agitator running.
    3. If tank mixing Assure II herbicide with another herbicide, use the following sequence:
    a) Muster herbicide or Odyssey NXT herbicide, Ally herbicide and Refine SG herbicide
    b) Ares herbicide or Basagran* herbicide, Eclipse herbicide, glyphosate, Liberty 150 SN herbicide, Lontrel herbicide, Pursuit herbicide, Solo ADV herbicide and Viper ADV herbicide
    c) Assure II Herbicide
    d) Slowly add Merge* , Sure-Mix, LI 700 or Liberate™ Adjuvant. Ensure that the herbicide is completely mixed before proceeding to the next step.
    4. Add the rest of the required water to the tank. Mix well before applying to the crop.
  • Herbicide Group

    Group 1

  • Grazing

    Prior to harvest, do not apply to:

    Canola within 64 days, chickpeas within 85 days, flax within 82 days, lentils or peas (field and processing) within 65 days, soybeans within 80 days.

    Do not graze the treated crops or cut for hay.

  • Tank Mixes

    • Ally®(2): Creeping red fescue

    • Tribenuron-methyl tolerant sunflowers

    • Muster®(2): Canola and mustard (condiment and oilseed oriental)

    • Refine® SG: Creeping red fescue

    • Ares™

    • Basagran®(3): Dry beans(2), soybeans

    • Eclipse™

    • Glyphosate: Roundup Ready® canola; Roundup Ready® soybeans

    • Liberty®(2)  for use in LibertyLink canola

    • Lontrel™(1)

    • Odyssey® NXT*

    • Pursuit®

    • Solo® ADV*

    • Viper® ADV(1*) field pea & soybean only 


    1  Minimum 250 mL/ac Assure II, add UAN 28% as per Viper®  ADV label
    2  Registered tank mixes
    3  Minimum 250 mL/ac Assure II

    Do not use Sure-Mix.

  • Packaging

    • Packaging: One (1) case contains 8 L of Assure II + 8 L jug Sure- Mix™. Assure II is also available in 500 L Mega totes.