Resistance Fighter: Herbicide Resistance Management

Win the Battle Against Resistant Weeds

Take steps to manage herbicide resistance in your area.

The war against resistant weeds will never end, but this season’s battle can be won. Find out how much you really know about the enemy with our Weed IQ Quiz.

Resistance Fighter® from Syngenta provides education, local recommendations and a comprehensive herbicide portfolio to help growers and retailers effectively manage resistant weeds in their area.

Tips for Good Stewardship:

  • Start clean, utilizing tillage or an effective burndown plus a pre-emergence residual herbicide application
  • Always use a two-pass, pre- and post-emergent system with herbicides at full rates
  • Use multiple effective modes of action with overlapping residuals
  • Use diversified management programs such as cover crops, mechanical weed control and crop rotation
  • Do not allow weeds to go to seed and add to the seed bank
  • Utilize good agronomic practices – narrow rows, increased plant populations and other practices that promote crop growth and competitive ability

Herbicide Recommendations by Region

Every farm has its own history and faces a unique set of challenges, so the best weed management program on your acres may require a different approach than your neighbor. Use the regional herbicide recommendation sheets as a starting point for tailoring the optimal weed management program for your unique operation.

Central Illinois, Northern Illinois, Wisconsin

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Colorado, Kansas, Nebraska

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Indiana, Michigan, Ohio

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Iowa, Minnesota, North Dakota, South Dakota

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Missouri, Southeastern Kansas, Southern Illinois, Southwestern Indiana

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Map of midwest regions from Herbicide Recommendation Sheets includes Illinois, Wisconsin, Iowa, Minnesota, North Dakota, South Dakota, Indiana, Ohio, Michigan, Kansas, Nebraska, Colorado and Missouri

New England, New York

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New Jersey, Pennsylvania

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Map of northeast regions from Herbicide Recommendation Sheets includes New England, New York, New Jersey and Pennsylvania


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Louisiana, Mississippi

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Mid-Atlantic (Delaware, Maryland, Virginia, West Virginia)

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Mid-South (Arkansas, Missouri)

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North Carolina, South Carolina, Virginia

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South Coast (Alabama, Georgia)

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Map of southern regions from Herbicide Recommendation Sheets includes Louisiana, Mississippi, North Carolina, South Carolina, Florida, Delaware, Maryland, Virginia, West Virginia, Alabama, Georgia, Tennessee, Arkansas, Missouri, Kentucky

East Texas, New Mexico, Oklahoma

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New Mexico, Oklahoma, West Texas

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Map of southwest regions from Herbicide Recommendation Sheets includes East Texas, New Mexico, Oklahoma and West Texas.

Diversity is Key to Fighting Herbicide Resistance

Syngenta offers a robust portfolio of pre-emergence and post-emergence herbicides to help you stay in control of difficult weeds on your farm.

boundary 6.5 EC
Boundary® 6.5 EC herbicide allows you to extend the post-application window up to five weeks after planting.
Learn About Boundary 6.5 EC
broadaxe xc
BroadAxe® XC herbicide helps maximize soybean yield potential with early-season weed management and long-lasting residual.
Learn About BroadAxe XC
Prefix® residual herbicide offers superior control of broadleaf weeds and grass to help you maintain clean fields and increase yield potential.
Learn About Prefix
flexstar gt 3.5
With two leading active ingredients, Flexstar® GT 3.5 herbicide delivers two different modes of action to combat difficult-to-control weeds in soybeans and cotton.
Learn About FlexStar GT 3.5
Acuron® herbicide contains four active ingredients and three modes of action for multi-targeted weed control.
Learn About Acuron
acuron flexi
Acuron® Flexi herbicide defeats tough weeds with added flexibility.
Learn About Acuron Flexi
halex gt
Halex® GT herbicide provides Glyphosate with Residual™ broadleaf weed and grass control.
Learn About Halex GT
Talinor® herbicide delivers excellent standalone control to tough broadleaf weeds in wheat and barley.
Learn About Talinor


Joseph Humes of Wyaconda, Missouri
Joseph Humes
Wyaconda, MO
“The best thing with Boundary herbicide is that it doesn’t matter whether you no-till or conventional till or just one-pass till, it helps give a residual that stays for a while. We see taller soybeans, more pods and better coloring, and that’s because we had no pressure there to rob any of our nutrients.”
Joshua Miller of Tamms, IL
Joshua Miller
Tamms, IL
“Pigweed is my toughest weed. It’s extremely prolific and is resistant to several chemicals, so it’s extremely hard to kill. Once it is established, it can take over like wildfire. With Acuron, we haven’t seen a single pigweed out there."
Mike Laux of New Baden, Illinois
Mike Laux
Golden Harvest® Seed Advisor, Grower
New Baden, IL
“I think Syngenta is the only provider out there that gives a comprehensive solution from the herbicide, the fungicide and the insecticide market, where we can take care of all of your crop needs with just one company.”

Resistance Fighter Resources

Read the latest articles from AgPro on weed management practices, new herbicide technology and insights from industry experts.

Dr. Ian Heap Chart
"The two major weeds at the forefront of glyphosate resistance would be Palmer amaranth and waterhemp," said Jason Norsworthy, professor and Endowed Chair of Weed Science at the University of Arkansas. Read Article »
Giant Ragweed
As weeds continue to develop resistance to glyphosate and other herbicide chemistries, growers have to modify and diversify their weed management programs. Read Article »
Palmer Amaranth
No question – Roundup® was a revolutionary herbicide that changed weed control. Also no question – overuse of Roundup has created glyphosate-resistant weeds that are now pretty much everywhere that row crops are grown. Read Article »
An effective, multifaceted weed management program includes not only herbicides but also cultural and mechanical practices. With an end goal of reducing the soil seed bank, researchers are exploring non-herbicidal opportunities to help growers. Read Article »
With new dicamba soybean herbicide technology expected to come to market in 2017, growers will need to be mindful of preserving the technology while at the same time tailoring a weed management program that keeps fields clean. Read Article »


February 23, 2017

Syngenta identifies key strategies to fight weed resistance

As corn and soybean growers deal with an expanding and intensifying threat of resistant weeds, Syngenta is recommending strategies for managing weeds that begin early in the season.Read more »

February 15, 2017

Minnesota grower discusses farm life in new Syngenta video

Read more »

December 07, 2016

Syngenta receives federal EPA registration for Talinor™ herbicide for wheat and barley

Read more »

November 14, 2016

Growers see strong 2016 performance from Syngenta corn herbicides: Acuron® and Acuron® Flexi

As weed resistance continues to spread, Acuron® and Acuron® Flexi corn herbicides delivered broad-spectrum control to defeat tough broadleaf weeds and grasses during the 2016 season. Read more »