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

DownloadDownload PDF

Colorado, Kansas, Nebraska

DownloadDownload PDF

Indiana, Michigan, Ohio

DownloadDownload PDF

Iowa, Minnesota, North Dakota, South Dakota

DownloadDownload PDF

Missouri, Southeastern Kansas, Southern Illinois, Southwestern Indiana

DownloadDownload PDF
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

DownloadDownload PDF

New Jersey, Pennsylvania

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


DownloadDownload PDF


DownloadDownload PDF

Louisiana, Mississippi

DownloadDownload PDF

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

DownloadDownload PDF

Mid-South (Arkansas, Missouri)

DownloadDownload PDF

North Carolina, South Carolina, Virginia

DownloadDownload PDF

South Coast (Alabama, Georgia)

DownloadDownload PDF


DownloadDownload PDF
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

DownloadDownload PDF

New Mexico, Oklahoma, West Texas

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


ajax-loader image

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


Robert Schmidt of Glasgow, MO
Robert Schmidt
Glasgow, MO
“I just have one philosophy for managing weed resistance: Kill the seed in the ground. Don’t let it get out of the ground and then try to kill it, especially in a no-till situation. We’re 95% no-till, so Boundary works very effectively in our program.”
Brad Hemeyer of Gilliam, MO
Brad Hemeyer
Gilliam, MO
“When you’re fighting something with just 1 mode of action, tolerance is a lot easier to build up over time. When you throw multiple modes of action at weeds, it’s much more difficult for the weeds to overcome that. Syngenta has one of the best full-season herbicide programs for effective modes of action that actually work for what we’re doing."
Jason McGee of Cherry Valley, Arkansas
Jason McGee
Crop consultant, Grower
Cherry Valley, AR
“I’ve seen success with my two-pass herbicide program, and recommend others start clean, apply a pre-emergence herbicide and overlay it with a residual herbicide. It’s a lot cheaper to implement an effective program early rather than waiting until you have a train wreck. A weed that never comes up is not one you’re going to miss.”

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 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 »

January 30, 2018

Syngenta stresses the importance of a start-clean, stay-clean approach to manage resistant marestail

Marestail, also known as horseweed, is top of mind for many corn and soybean growers preparing for the 2018 growing season.Read more »

January 25, 2018

Syngenta herbicides cleared for tank mixes on Roundup Ready 2 Xtend® soybeans and Bollgard II® XtendFlex® cotton

Syngenta has received confirmation from the Environmental Protection Agency (EPA) that several Syngenta herbicide tank-mix options have been cleared for inclusion with both XtendiMax® with VaporGrip® Technology and Engenia® herbicides.Read more »

November 30, 2017

Talinor provided excellent weed control in cereal crops during 2017 growing season

With growers across the U.S. continuing to face both susceptible resistant weeds in their wheat and barley crops, Syngenta announced that Talinor herbicide delivered excellent control of difficult broadleaf weeds, such as kochia and Russian thistle, during the 2017 growing season.Read more »