corn early season

Sortan IS

  • Herbicide


  • 2

Sortan™ IS corn herbicide removes early season weed pressure from volunteer Roundup Ready® canola in corn. Sortan IS provides extended control of tough broadleaf and grassy weeds throughout the critical weed free period.


Maximize your corn yield by controlling weeds early with Sortan IS herbicide.

Removes early-season weed competition

Sortan IS herbicide is designed to remove early season weed competition including volunteer Roundup Ready® canola and wild buckwheat.

Resistance management

Sortan IS provides an additional mode of action to glyphosate, making it a great tool for effective resistance management.

Extended control

Extended control of tough broadleaf and grassy weeds throughout the critical weed free period.

Critical weed free period

Sortan IS is a powerful and versatile tool that can be applied from pre-emergence or spike to the V3 stage, which will help growers keep their corn weed free during the critical weed-free period. The critical weed free period in corn is from emergence to the V4 (6 leaf) stage. Removing weeds during this period is key to minimizing yield loss due to weed competition in corn.


Below lists the crops that Sortan IS herbicide can be used on.


Corn (All Types) (Zea mays ssp. mays)

Provincial Registrations

Now registered in the following provinces:

  • Registered
  • Unregistered

Technical Specifications

  • Approved Use

    Refer to the Sortan IS label for complete use instructions.
    Refer to the Controlled Weeds list for the full list of weeds.

    Weeds controlled
    • Volunteer Canola(*)
    • Redroot Pidweed (including triazine resistant)
    • Yellow Foxtail(1)
    • Large (Hairy) Crabgrass(1)
    (1) Suppression only.
    (*) Tank-mix with glyphosate required for volunteer Clearfield® canola control.

  • Rates

    Weeds controlled
    Post-emergent application - 30 g rate - 40 ac/bottle

    (Refer to product label for more details on the post-emergent application).
    • Volunteer canola* (including glyphosate tolerant)
    • Wild buckwheat (when tank mixed with glyphosate)

    15 g rate - 80 ac/bottle
    • Barnyard grass
    • Green foxtail
    • Fall panicum
    • Lamb’s-quarters
    • Old witchgrass
    • Quackgrass (suppression)
    • Redroot pigweed
    • Wild buckwheat
    • Volunteer canola (including glyphosate tolerant)
    • Yellow foxtail (suppression) Pre-emergent application - 30 g/ac, 40 ac/bottle
    • Barnyard grass
    • Green foxtail
    • Yellow foxtail (suppression)
    *Tank-mix with glyphosate required for volunteer Clearfield® canola control.
    Refer to product label for complete details prior to use.
    Consult your local representative for guidelines on extended control.
    • Packaging: 1.2 kg bottle
    • Water volume: Minimum 40 L/ac (9 imp. gal/ac)

  • Application Timing

    • Pre-emergent application – before emergence of weeds.
    • Post-emergent application – VE (spike) to V3 (5 leaf stage).
    Corn leaf stages can vary depending on both growing conditions and corn seed product.

    Rainfast: 4 Hours

  • Crop Rotation
    The following crops may be seeded 10 months after application:
    • Barley
    • Canola
    • Chickpeas
    • Corn (sweet or seed)
    • Dry beans
    • Fababeans
    • Field corn may be seeded any time after application
    • Field peas
    • Flax
    • Lentils
    • Oats
    • Potatoes
    • Soybeans
    • Spring wheat (including durum)
    • Sunflowers
  • Mixing Instructions
    1) Fill clean tank about 1⁄3 full with fresh water.
    2) Turn on full agitation.
    3) With the agitator running, add the required amount of Sortan IS Herbicide. Continue to agitate for a minimum of 5 minutes to ensure that Sortan IS Herbicide is completely dissolved.
    4) Once granules are dissolved continue to fill the tank to 2⁄3 to 3⁄4 full, then add the required amount of the tank mix partner.
    5) After Sortan IS Herbicide (and tank mixed herbicide if applicable) has been well mixed and is in suspension, add a recommended non-ionic surfactant at 2 L per 1,000 L spray solution (0.2 % v/v). Surfactant not required if tank mixing with 360 g per acre glyphosate.
    6) Fill the remainder of the spray tank.
    7) For repeat tank loads, reduce the material remaining in the tank to 10% of the original volume or less before proceeding with step 1, because remaining chemicals may prevent Sortan IS Herbicide granules from completely dissolving. If this is not possible, pre-slurry Sortan IS Herbicide in a small amount (5-10 L) of water before adding to the tank.

    Tank clean-out
    Ammonia based cleaners are preferred.
  • Herbicide Group

    Group 2

  • Grazing

    • Must not be applied within 30 days of harvest.

    • Do not graze or silage for a minimum of 30 days.

  • Tank Mixes

    • Tank-mix with a glyphosate herbicide at 365 g ai/ac (900 g ai/ha) for control of additional weeds (glyphosate-tolerant corn only).

    • Registered for use in field corn including Roundup Ready varieties.




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

West Field Guide
View a comprehensive listing of information on Corteva Agriscience products available in Western Canada.