Syngenta is pleased to announce Princep® Liquid herbicide will become available in October 2026, offering the same proven formulation turf managers have trusted for pre-emergent control of troublesome weeds, including Poa annua, burclover, lawn burweed, common and mouse-ear chickweed, henbit and more. 

“Princep Liquid gives turf professionals a dependable option for managing a variety of broadleaf and grassy weeds in warm-season turf,” said Lane Tredway, Ph.D., technical services manager, Syngenta Professional Solutions. “Its flexibility in tank-mix programs makes it a valuable tool for broadening control and supporting resistance management, especially when targeting Poa annua and other winter annuals.”

Princep Liquid can be used on bermudagrass, centipedegrass, St. Augustinegrass and zoysiagrass with excellent safety from fall through spring. Turf professionals can use it to control a broad spectrum of annual weeds while boosting the activity of other herbicides, including Barricade® 4FL herbicide, Monument® 75WG herbicide, Tenacity® herbicide and Reward® landscape and aquatic herbicide.

For Poa annua control, tank mix applications of Barricade 4FL, Monument 75WG and Princep Liquid to provide early post-emergent control and resistance management. For winter weed control, Princep Liquid can also be applied to semi-dormant turf without delaying green-up, and mixtures of Reward and Princep Liquid provide excellent control of Poa annua and other winter annuals on dormant bermudagrass.

“We’re excited to make Princep Liquid available again as a trusted component of turf weed management programs,” said Stephanie Schwenke, market manager, Syngenta Professional Solutions. “Its proven performance delivers consistent, broad-spectrum control of troublesome annual weeds, helping turf professionals protect their investment and achieve long-lasting results.”

To learn more about Princep Liquid, contact your local Syngenta territory manager or visit GreenCastOnline.com/Princep. Join the conversation online ― connect with us on X and  YouTube.

© 2026 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 and/or may have state-specific use requirements. Please check with your local extension service to ensure registration and proper use. Barricade®, GreenCast®, Monument®, Princep®, Reward®, Tenacity® and the Syngenta logo are trademarks of a Syngenta Group Company. All other trademarks are the property of their respective third-party owners.