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Syngenta announces EPA registration of a new corn herbicide innovation: Storen

GREENSBORO, N.C., U.S.A., July 12, 2023 ― Syngenta announced today that its latest residual corn herbicide, Storen, has been registered by the U.S. Environmental Protection Agency and will be available for use in 2024, subject to state approvals.

Storen combines four powerful residual active ingredients — bicyclopyrone, mesotrione, S-metolachlor and pyroxasulfone ― to deliver consistently clean rows up to three weeks longer than other leading corn herbicides*.

“Weeds continue to evolve and are outsmarting the most effective herbicide programs used today,” said Shawn Hock, corn herbicide product lead for Syngenta Crop Protection. “In fact, we surveyed preemergence corn herbicide users and 40% of those surveyed said Palmer amaranth and waterhemp were difficult to control with their program. That is why we invest in new innovations to help growers meet emerging weed challenges, and we are excited to announce Storen corn herbicide to help restore confidence in their weed control.”

One such grower, Matt Moreland, from Medford, Oklahoma, explained why growers like him need Storen now more than ever.

“We farm along the Kansas-Oklahoma border and deal with weeds like Palmer amaranth and grasses, which contact herbicides used to control before weeds became resistant,” said Moreland. “We’ve adapted our approach to rely on strong residual herbicides that prevent weeds from emerging and taking over our fields, and that’s why we’re looking for a longer-lasting herbicide that’s going to get me through canopy.”

“Trials showed Storen kept fields clean for up to three weeks longer than other leading corn herbicides,” said Brett Miller, regional head of field development for Syngenta Crop Protection. “When you put a full rate of the four most effective residual active ingredients together that control resistant weeds, it’s no wonder we’re seeing a higher level of control from Storen than any other product.”

Storen is labeled for preemergence and post-emergence in field corn and seed corn and has partial control, or control, of more than 74 weed species, including control of Palmer amaranth, waterhemp, kochia, common lambsquarters, morningglory, Giant ragweed, common ragweed, and annual grasses.

“We encourage growers and retailers to contact their local Syngenta rep to see Storen in field trials at Syngenta Grow More Experience sites across the country this season,” said Hock. “We’ll also have Storen demos at the Syngenta tent at the Farm Progress Show in Decatur, Illinois, and Husker Harvest Days in Grand Island, Nebraska, so you can come out and see it for yourself.”

For more information about Storen, visit the Storen website. Join the conversation online ― connect with Syngenta at

*Length-of-control advantage based on 2022 Syngenta and university replicated trials comparing Storen to Resicore® and TriVolt.

About Syngenta
Syngenta Crop Protection and Syngenta Seeds are part of Syngenta Group, 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.

The content of this release is for information purposes only. This release is not, and should not be construed as, an offer to sell or issue or the solicitation of an offer to buy any securities or other property interests.

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Media Contacts:
David Piñon

Courtney Heinold

Web Resources:
Storen Website
Know More, Grow More
Syngenta Newsroom
Syngenta U.S.