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University researchers offer weed management advice for 2021 growing season


Syngenta engaged university agricultural experts from across the U.S. to suggest solutions for the toughest weed management challenges farmers are facing

GREENSBORO, NC, USA, Oct. 21, 2020 – As the 2020 corn-growing season draws to a close, Syngenta engaged university agricultural researchers from across the U.S. to analyze the agronomic challenges farmers encountered this season and offer tips on how they can best control weeds and preserve yields heading into 2021. Although weed pressures vary by geography, weed management fundamentals remain consistent throughout the U.S. 

Researchers agree that the time to set a weed management strategy for 2021 is now. "The end of the season is the time to take inventory of whatever you did, how well it worked and then consider how you might improve on that for next year,” said Wayne Keeling, Ph.D., professor in the Department of Soil and Crop Sciences at the Texas A&M AgriLife Research Center at Lubbock. 

Across the board, the researchers emphasized early-season weed control as the path to maximizing yield potential. “For corn, early-season weed control is especially important because key elements of yield potential are determined early in the growing season,” said Sarah Lancaster, Ph.D., assistant professor and extension specialist at Kansas State University. “Any limitations created by weeds during that time will limit the yield potential of the crop.” 

Researchers underscored the significance of weed control during this early-season timing. “Control is mostly emphasized on weeds that germinate before or shortly after corn emergence, because controlling those weeds plays a large role in preserving yield potential within that crop,” said Erin Burns, Ph.D., assistant professor and extension weed scientist at Michigan State University. 

This crucial control period is defined as the vegetative stages between V3 and V12. “If you let weeds stay in the field past the V2 stage of corn growth, you start to see 10% to 20% yield reductions,” said Bill Johnson, Ph.D., professor of weed science at Purdue University. “If you leave them out there until the corn is knee- to waist-high, you can start seeing 20% to 50% yield reductions.” 

In addition to the physical competition for resources, several experts mentioned the physiology of weed presence in the field. “We discovered that plants can actually detect their neighbors. They know who's around them, and they respond,” said Clarence Swanton, Ph.D., professor emeritus at the University of Guelph, Canada. “Even without touching the plant, a weed can reduce that plant’s capability to photosynthesize. The plant has to expend energy to heal itself after it experiences the presence of a weed, and that's part of why the yield potential changes so dramatically. What you and I as humans experience under stress, a plant does, too.”

Aaron Hager, Ph.D., associate professor of extension weed science at the University of Illinois, agreed. “We call them weeds, but they're plants,” he said. “They have a lot of the same requirements that the crop has — moisture, nutrients, sunlight — and the resources that the weeds use up become resources that the crop does not have access to.” 

Syngenta consulted with these leading university researchers to highlight ways troublesome weeds impact yield potential. “We want to provide our growers with the knowledge and tools they need to effectively manage their top weed pressures so they can maximize their yield potential next season and for many seasons to come,” said Steve Gomme, herbicide product marketing lead for Syngenta. “And we have a robust portfolio of premixes, like Acuron® corn herbicide, that enable us to offer weed management solutions for every acre.”

Acuron contains four active ingredients, including the Syngenta-exclusive bicyclopyrone, and three effective sites of action.

“This combination delivers long-lasting residual weed control with built-in resistance management,” said Gomme. “Because of its powerful weed control, longest-lasting residual and proven crop safety, Acuron outyields all other corn herbicides by 5 to 15 more bushels an acre when used preemergence at full labeled rates.*”

Bicyclopyrone allows Acuron to provide greater consistency across various weed spectrums, weather conditions and soil types. This unique chemistry enhances control of more than 70 broadleaf and grass weeds. It also provides built-in burndown control and the longest-lasting residual to minimize the weed seed bank for the next year’s crop.

“The bottom line is less weed competition means more nutrients, sunlight and water are available for the growing corn crop,” said Gomme. “This leads to stronger, healthier plants that produce more bushels and, ultimately, more revenue potential at harvest.” 

To calculate how much more revenue potential you can find with Acuron, visit the Revenue Calculator. For more information about Acuron, visit Acuron-Herbicide.com. Join the conversation online – connect with Syngenta at Syngenta-us.com/social.

About Syngenta 
Syngenta is one of the world’s leading agriculture companies. 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. With 28,000 people in more than 90 countries we are working to transform how crops are grown. Through partnerships, collaboration and The Good Growth Plan we are committed to improving farm productivity, rescuing land from degradation, enhancing biodiversity and revitalizing rural communities. To learn more visit www.syngenta.com and www.goodgrowthplan.com. Follow us on Twitter at www.twitter.com/Syngenta and www.twitter.com/SyngentaUS.

Media Contacts:
David Piñon
336-632-7504
david.pinon@syngenta.com

Eric Groover
919-870-5718
egroover@gscommunications.com

Web Resources:
Acuron
Revenue Calculator
Know More, Grow More
Syngenta Newsroom
Syngenta U.S.
Thrive

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This document may contain forward-looking statements, which can be identified by terminology such as ‘expect’, ‘would’, ‘will’, ‘potential’, ‘plans’, ‘prospects’, ‘estimated’, ‘aiming’, ‘on track’ and similar expressions. Such statements may be subject to risks and uncertainties that could cause the actual results to differ materially from these statements. For Syngenta, such risks and uncertainties include risks relating to legal proceedings, regulatory approvals, new product development, increasing competition, customer credit risk, general economic and market conditions, compliance and remediation, intellectual property rights, implementation of organizational changes, impairment of intangible assets, consumer perceptions of genetically modified crops and organisms or crop protection chemicals, climatic variations, fluctuations in exchange rates and/or commodity prices, single source supply arrangements, political uncertainty, natural disasters, and breaches of data security or other disruptions of information technology. Syngenta assumes no obligation to update forward-looking statements to reflect actual results, changed assumptions or other factors.

* 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.

©2020 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 is a Restricted Use Pesticide. Acuron® and the Syngenta logo are registered trademarks of a Syngenta Group Company. All other trademarks are the property of their respective owners.

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