Leave Nothing Behind

That's a bold statement, but when it comes to pre-seed weed control in cereals, we've got the products to back it up. Corteva Agriscience™, offers four cereal pre-seed herbicides, all with SoilActive™ technology, for extended broadleaf weed control. That means, the weeds on the surface are controlled, as well as the weeds that have yet to emerge, so you can seed into clean fields next spring.

Which product is right for you?

Paradigm™ PrePass™ XC PrePass™ FLEX Korrex™ II
Weeds controlled Annual and perennial broadleaf weeds and grasses plus Group 2 resistant cleavers and hemp-nettle Annual and perennial broadleaf weeds and grasses Annual and perennial broadleaf weeds and grasses Annual and perennial broadleaf weeds plus resistant kochia
SoilActive technology 15 days 21 days 21 days 15 days
Resistant kochia control
Resistant cleavers and hemp-nettle control
Glyphosate included
Choose your glyphosate
Just Go Benefits
Crops Wheat and barley Wheat, barley, and oats Wheat, barley, and oats Wheat, barley, and oats
Bulk options Available in a convenient GoDRI formulation
Rates Spring: 106 ac/jug
Fall: 80 ac/jug
40 ac/case
300 ac/drum
1,200 ac/tote
640 ac/case Spring: 80 ac/case
Fall: 56/case
Rainfast 1 hour 30 minutes 30 minutes 30 minutes
Resistance management / multi-mode of action
Paradigm PrePass XC PrePass FLEX Korrex II

SoilActive Technology

All four Corteva pre-seed herbicides contain SoilActive technology, which lets you control emerged weeds at the time of application, and weeds that emerge up to two weeks after spraying.

Why Glyphosate Alone is Not Enough

Glyphosate is not enough to control key weeds.

Pre-seed applications offer real advantages, but glyphosate alone does not provide full control of some winter and spring emerging annuals. Cleavers, dandelion, narrow-leaved hawk's beard and flixweed require early control. When spring moisture levels are high, these weeds will regrow quickly, so control prior to seeding is important.

Key Weeds

Glyphosate is not enough for tough winter annuals.

Winter annuals like narrow-leaved hawk's beard, cleavers, chickweed and stinkweed emerge in late fall and overwinter as rosettes or 3- to 4-leaved seedlings. Come spring, they set seed and flourish ahead of crops, outcompeting for moisture and nutrients.

Winter Annuals

Glyphosate is not enough for weeds that flush.

Flushing weeds like wild buckwheat, cleavers, dandelion, scentless chamomile, shepherd's purse and stinkweed outcompete crops for valuable nutrients and moisture, spring and fall. Glyphosate alone controls only those weeds actively growing at the time of application, leaving flushing weeds to keep coming back.

Weeds that Flush

Glyphosate is not enough for volunteer canola.

Glyphosate alone will not control Roundup Ready volunteer canola. Because Roundup Ready canola is so pervasive across Western Canada, this issue will only continue to grow. Glyphosate alone only controls emerged InVigor® and Clearfield® canola volunteers.

All types of volunteer canola:

  • Decrease yields by outcompeting crops for nutrients.
  • Decrease grain quality with increased dockage.
  • Can act as a host for blackleg and increase flea beetle pressure (because the seed is untreated).
  • Can act as a host for clubroot and, if not controlled, help it spread."

Weeds that Flush

Glyphosate is not enough to manage glyphosate resistance.

Glyphosate resistance is a growing concern due to its frequent and repeated use. Glyphosate contains just one active ingredient and works through one mode of action. Effective herbicide resistance management requires the use of products with multiple modes of action that deliver overlapping activity on the same weeds.

Suspect herbicide resistance when:

  • Weeds escape in odd shaped patches.
  • Some labeled weeds are controlled while others are not.
  • Records show repeat use of the same herbicide or herbicide group.
  • Escapes aren't attributable to environmental conditions or emergence after application.
  • The same herbicide or group fails in the same area of a field the previous year.

The best bet for growers is to get superior control with one application of Korrex II or Paradigm for pre-seed rather than hoping for the best with glyphosate alone, or worse, with multiple glyphosate applications.

As a multi-mode of action product, Korrex II and Paradigm for pre-seed are effective resistance management tools that can help slow the development of glyphosate resistant weed populations.

Glyphosate is not enough for weeds yet to emerge.

To control weeds that have not yet emerged, Korrex II or Paradigm for pre-seed deliver 2 weeks of SoilActive technology, controlling both actively growing weeds and those that emerge following application. It allows growers to spray earlier and trust the technology to control weeds until their crop is in the ground. Susceptible weeds include: volunteer canola, wild buckwheat, flixweed, cleavers, stinkweed, chickweed and more.

Spray Korrex II or Paradigm for pre-seed two weeks ahead of seeding, and as susceptible weeds emerge in treated fields, they take up the active ingredient through their root systems, stopping growth.

Glyphosate is not enough to support early seeding.

Research suggests yields increase with early seeding*. Seeding early, in mid to late April or early May, allows the crop to make good use of available moisture, get a head start on weeds, and flower earlier, resulting in less heat stress. Early-seeded cereals produce higher grain quality and increased yields when seeded into clean fields. To produce top yields, early weed control is essential.

Paradigm for preseed and Korrex II allow growers to seed early into a clean field that will stay clean while the crop is established. With 2 weeks of SoilActive control, growers can focus on getting their seed into the ground as early as possible.

Fall Offer

*On matching acres of Corteva Agriscience canola hybrids and your fall pre-seed purchase. Corteva Agriscience brands include: Brevant™ brand, Pioneer® brand and Pioneer brand D-Series canola hybrids (up to $2.25/acre). Commit defined: Contract, book or purchase your Corteva Agriscience brands by October 16, 2018. The discount will be paid as a rebate based on your invoiced purchases of eligible products between August 1, 2018 and October 16, 2018. Minimum 200 acres required. Paid as a rebate on top of any savings from the 2018 Diamond Rewards program. Corteva Agriscience reserves the right to amend this offer at any time.


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