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Syngenta helps growers overcome unique conditions as the 2021 season approaches

Syngenta partnered with university researchers about proper preparation to maximize yield potential

GREENSBORO, NC, USA, March 10, 2021 – As the 2021 growing season approaches, corn and soybean growers are thinking through strategies to maximize yield potential and create field conditions that will benefit their crops for years to come. As a first step, Syngenta recommends scouting fields and reviewing notes from the close of the 2020 season. 

“I always try to encourage people to look at the subtle changes that are happening in the fields where you farm for a long time. Is foxtail control getting more difficult? Is waterhemp making inroads in your area?” said Bill Johnson, Ph.D., professor of weed science at Purdue University. “Maybe it's not in your field, but maybe you’ve got some neighbors who have it. Pay attention to the subtle things.” 

Across the board, researchers stress the importance of early-season weed management. “Some of the biggest findings of our research were just how competitive weeds can be early on in corn development,” said Erin Burns, Ph.D., assistant professor and extension weed scientist at Michigan State University. “There is a critical period of weed control in corn, which is mostly emphasized on weeds that germinate before or shortly after corn emergence; and controlling those weeds plays a large role in preserving yield potential within that crop.”

“A more pragmatic reason for early-season weed control, especially the use of residual herbicides around the time of planting, is that weather in the Midwest is unpredictable,” added Sarah Lancaster, Ph.D., assistant professor and extension specialist at Kansas State University. “One rain event could be the difference between a timely post-emergence herbicide application with excellent weed control or a ‘rescue’ situation with substantial yield loss, especially if preemergence herbicides were not used.”

Burns pointed to specific examples in Michigan. “Like other states, we have issues with the big weeds: waterhemp and Palmer amaranth,” she noted. “The incredible growth rate and seed production for those two species plus the ability to quickly evolve herbicide resistance are all problematic.”

All of the researchers recommend starting with clean fields, applying herbicides with multiple effective sites of action early in the season, and implementing sound agronomic practices for the most effective weed management and to minimize resistance. 

“Syngenta offers a robust portfolio of premixes that protect yield potential for both corn and soybeans,” said Mark Kitt, Syngenta corn herbicide technical lead. Acuron® corn herbicide contains four active ingredients, including the Syngenta-exclusive bicyclopyrone, and three effective sites of action for long-lasting residual with built-in resistance management.

“Acuron manages tough, yield-robbing weeds other products miss, and better weed management means higher yield potential,” Kitt continued. “When applied preemergence and at full-label rates, Acuron outyields competitive herbicides by 5 to 15 bushels an acre because of its unique combination of powerful weed management, longest-lasting residual and proven crop safety.”* 

For soybeans, Syngenta empowers growers to optimize their herbicide application for their specific field conditions and trait platform with a diverse portfolio of solutions that includes Boundary® 6.5 EC, BroadAxe® XC and Prefix® herbicides preemergence for managing ALS-, PPO- and glyphosate-resistant weeds. These flexible options provide effective weed management across a range of geographies, soil types and across all trait systems.

Additional tools in the soybean portfolio include Tavium® Plus VaporGrip® Technology herbicide applied early post-emergence for effective knockdown and residual control of key weeds, including ragweed, marestail, Palmer amaranth and waterhemp; and Sequence® herbicide to provide overlapping post-emergence residual to help keep soybeans clean through canopy and beyond. 

“From a best operational standpoint, to delay or manage herbicide resistance, the key is to integrate some cultural strategies like high seeding rates, narrow row spacing, the use of cover crops and harvest weed seed control methods (chaff lining/seed destructors) in integration with herbicide programs,” said Prashant Jha, Ph.D., associate professor and extension weed specialist at Iowa State University. “Herbicides will always remain the foundation of our weed management programs in corn and soybeans, but complementary or alternative strategies will help to prolong the life of the chemistries we have.” 

Syngenta recommends growers use sound cultural practices to manage weeds and delay the onset of herbicide resistance. For additional tips and agronomic strategies to manage weed resistance, visit To calculate how much more revenue potential you can find with Acuron, visit the Revenue Calculator. To identify which soybean herbicide program will work best for your fields, use the soybean herbicide program planning tool. Join the conversation online – connect with Syngenta at

About Syngenta 
Syngenta is one of the world’s leading agriculture companies, comprised of Syngenta Crop Protection and Syngenta Seeds. Our ambition is to help safely feed the world while taking care of the planet. We aim to improve the sustainability, quality and safety of agriculture with world-class science and innovative crop solutions. Our technologies enable millions of farmers around the world to make better use of limited agricultural resources. Syngenta Crop Protection and Syngenta Seeds are part of Syngenta Group with 49,000 people in more than 100 countries working to transform how crops are grown. Through partnerships, collaboration and the Good Growth Plan, we are committed to accelerating innovation for farmers and nature, striving for carbon neutral agriculture, helping people stay safe and healthy, and partnering for impact. To learn more visit and Follow us on Twitter at and

Media Contacts:
David Piñon

Eric Groover

Web Resources:
Boundary 6.5 EC
BroadAxe XC
Resistance Fighter
Revenue Calculator
Tavium Plus VaporGrip Technology
Know More, Grow More
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*When applied preemergence and at full label rates. Acuron yield advantage range based on 2016 Syngenta and University trials comparing Acuron to Corvus®, Resicore®, SureStart® II and Verdict®. For more information on Acuron versus an individual product, ask your Syngenta representative.

Performance assessments are based upon results or analysis of public information, field observations and/or internal Syngenta evaluations. Trials reflect treatment rates commonly recommended in the marketplace.

©2021 Syngenta. Syngenta 410 Swing Road Greensboro, NC, 27409. 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 and Tavium Plus VaporGrip Technology are Restricted Use Pesticides. For use by certified applicators only. Acuron®, Boundary®, Prefix®, Resistance Fighter®, Sequence®, Tavium® and the Syngenta logo are registered trademarks of a Syngenta Group Company. BroadAxe® is a registered trademark of FMC Corporation. VaporGrip® is a registered trademark of, and used under license from, Monsanto Technology, LLC. All other trademarks are the property of their respective owners.