Resistance Fighter | Syngenta US

Resistance Fighter: Herbicide Resistance Management

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Our new interactive map lets you advance through the years to show how herbicide-resistant weeds have become the challenge they are today. Plus, get our free agronomic email series with the tips you need to keep fields clean this season and manage herbicide resistance long-term.

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Resistance Fighter: Herbicide Resistance Management

Experience Our Interactive Map

Do you know where herbicide resistance has spread? Our interactive map lets you advance through the years to show how resistance has become the challenge it is today. Plus, get our #Plant2020 Prep Series to help keep your fields clean in 2020.

View the Map

Win the Fight Against Tough Weeds

Weed resistance management is a top concern on every grower’s mind. The actions you take with the herbicide sprayer this season play a key role in the yield potential numbers you will see at harvest and beyond.

Herbicide resistance in weeds and crops continues to present a major challenge, which is why Syngenta offers the most diverse portfolio of weed control products available. Our agronomy experts who live and work in your area can help you craft the preemergence and post-emergence herbicide solutions that fit your operation’s specific needs.

Two illustrated weeds with a background of a rising sun.

Source: Heap, I. The International Survey of Herbicide Resistant Weeds. Online. Internet. Thursday, October 31, 2019. Available www.weedscience.org

"Why has our Resistance Fighter program always had your back?
Because we’ve always thought that the only legacy worth having is one built upon preserving yours."

-- Dane Bowers, herbicide technical product lead, Syngenta

Steps for Weed Resistance Management

  • Start clean, utilizing tillage or an effective burndown, plus a preemergence herbicide with residual control
  • Use multiple effective sites of action with overlapping residuals to help delay herbicide tolerance or resistance
  • Always use a 2-pass system of a preemergence herbicide followed by a post-emergence herbicide at the full label rates
  • Do not allow weeds to go to seed and add to the seed bank, as this can result in generations of herbicide-resistant plants
  • Utilize good agronomic practices, such as narrow rows and increased plant populations, to promote crop growth and competitive ability

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Portfolio Support

Soybean Products

Tavium® Plus VaporGrip® Technology herbicide is a premix featuring dicamba plus residual control that manages key broadleaf and grass weeds.

Learn About Tavium

Boundary® 6.5 EC herbicide gives ALS- and PPO-resistant weeds a one-two punch that they don’t see coming.

Learn About Boundary 6.5 EC

BroadAxe® XC herbicide manages beyond the basic weeds that evade most other herbicides.

Learn About BroadAxe XC

Prefix® herbicide provides maximum weed management on either side of planting.

Learn About Prefix

Flexstar® GT 3.5 herbicide is the post-emergence partner in a full-season weed management program for Midwest growers.

Learn About Flexstar GT 3.5
Corn Products

Acuron® herbicide combines four active ingredients and three effective sites of action to deliver more effective and more consistent weed control than any other product.

Learn About Acuron

Acuron® Flexi herbicide defeats tough weeds with added flexibility.

Learn About Acuron Flexi

Halex® GT herbicide provides Glyphosate with Residual™ broadleaf weed and grass control.

Learn About Halex GT

Lexar® EZ herbicide combines three active ingredients and three effective sites of action for long-lasting residual control of annual grass and broadleaf weeds.

Learn About Lexar EZ

Lumax® EZ herbicide combines three active ingredients and three effective sites of action for long-lasting residual control of annual grass and broadleaf weeds.

Learn About Lumax EZ
Wheat Products

Talinor® herbicide delivers excellent standalone control to tough broadleaf weeds in wheat and barley. Now growers can get efficient, one-pass grass and broadleaf weed control with multiple modes of action by tank-mixing Talinor with Axial® Bold or Axial Star herbicides.

Learn About Talinor

Know Your Weeds

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Marestail

The first glyphosate-resistant weed identified in U.S. row crops in 2000, marestail is a dangerous weed. It produces up to 200,000 seeds/plant and grows up to 5-6 feet tall. The seeds are highly mobile, which results in rapid spread.

Marestail usually germinates in fall and spring, but can germinate year-round.

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Waterhemp

Waterhemp produces up to 1 million seeds/plant and can grow as much as 1 inch/day. The average height is 4-5 feet tall, with some weeds reaching up to 12-feet tall.

The pollen from these weeds can travel ½ a mile or more and because of the cross pollination that occurs, resistance can spread quickly.

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Palmer Amaranth

Palmer amaranth thrives in reduced-, minimum- or no-tillage systems because it germinates close to the soil surface. It can produce 10,000 to 100,000 seeds/plant and has the potential to overtake the crop due to its rapid growth and aggressive competition. Palmer amaranth is more competitive than other pigweed species, with a growth rate approaching 3 inches/day.

When allowed to compete throughout the growing season, Palmer amaranth can create yield losses of up to 91% in corn and 79% in soybeans. It can reach 8 feet in height.

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Morningglory

Once established, morningglory is very tough to control with post-emergent herbicide applications. It competes with corn and soybeans for nutrients and has the potential to reduce yield.

Morningglory can produce up to 500 seeds/plant, and, due to an extremely hard seed coat, some seeds can remain viable in the soil for more than 50 years.

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Giant Ragweed

Research shows that season-long competition from giant ragweed can lead to crop losses of 30 to 90%.

Giant ragweed often grows taller higher than the crop, sometimes up to 5 feet taller. It can produce up to 5,100 seeds per plant.

 
 

Testimonials

Jim Campion standing in field treated with herbicide resistant weeds.
Jim Campion
Grower, Star County
Illinois
“We went to four sites of action and we’ve got some of the cleanest soybean fields we’ve had in years. Maybe a few annuals here and there, but our big weed pressure has really been taken care of this year.”
Matt Dop standing in field treated with herbicide resistance.
Matt Dop
Retail Sales Agronomist, Key
Cooperative, Newton, Iowa
“The actions I’ve taken to deal with weed resistance in my field are to make sure I use a full rate of a preemergence herbicide on the first pass and come back with a layer of residual herbicide on the second pass.”
Rick Johnson standing in field treated with a weed resistance management.
Rick Johnson
Grower
Monee, Illinois
“We’ve tried to be proactive in the way that we approach weed resistance. We’re layering residuals, we’re looking at different sites of action on different herbicide applications and we’re relying on cover crops to suppress some of our early weeds. It’s really a combination of a lot of things to try to better manage the resistance problems.”

Know More, Grow More Support

Our blog provides the latest agronomy news and production advice to help you maximize your fields’ potential. Keep up with local crop insights straight from the field.

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Syngenta News

April 17, 2018

Syngenta herbicide, Fusilade® DX, cleared for tank mix on Roundup Ready 2 Xtend® soybeans

Syngenta has received confirmation from the Environmental Protection Agency (EPA) that Fusilade® DX herbicide has been cleared for tank mixing with both XtendiMax® with VaporGrip® Technology and Engenia® herbicides. Fusilade DX will be available for use on Roundup Ready 2 Xtend® soybeans, providing growers with more options for a strong weed management plan this growing season.Read more »

March 06, 2018

Syngenta identifies key strategies to manage the spread of resistant Palmer amaranth

Syngenta warns that glyphosate-resistant Palmer amaranth, one of the most threatening weeds in Southern corn and soybean fields, continues to spread into the Midwest. Knowing how to defeat this tough weed is imperative to protect crop yields and manage future resistance.Read more »

February 23, 2018

Minimize threat of resistant kochia by planning ahead, Syngenta advises

Kochia can be exceptionally competitive with corn, soybean and cereal crops. Take control of the weed by treating it with Syngenta residual herbicides and take back your field.Read more »

February 15, 2018

Syngenta recommends overlapping residuals for season-long waterhemp management

Due to the expanding threat of resistant waterhemp, Syngenta urges corn and soybean growers to prepare a management strategy that includes overlapping residual herbicides with multiple, effective modes of action (MOAs) for the upcoming growing season.Read more »

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© Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. Acuron, Lexar EZ, Lumax EZ and Tavium Plus VaporGrip Technology are Restricted Use Pesticides. For use by certified applicators only. The trademarks or service marks displayed or otherwise used herein are the property of a Syngenta Group Company. VaporGrip® is a registered trademark of, and used under license from, Monsanto Technology, LLC. All other trademarks are the property of their respective owners.