Locking in a winning weed management strategy begins with overlapping residual herbicides. With tough weeds like waterhemp and Palmer amaranth, soybeans often require this herbicide program to help ensure weed-free fields until canopy closure. Read on to learn more about this two-step program that will help you get there.
Step 1: Start out strong
Choosing the longest lasting residual herbicides allows growers to truly start clean and stay clean throughout the season. The best active ingredients to use when it comes to overlapping residual herbicides are those with the longest soil half-lives. Authority® Supreme herbicide and Authority® Edge herbicide from FMC are equipped with sulfentrazone and pyroxasulfone, which boast a lengthy half-life of 70.8 days and 34 days, respectively. Competitive actives don’t come close (see chart below). With sulfentrazone and pyroxasulfone in the tank, growers get off to a strong start with their preemergence herbicide application. The impressive residual gives growers up to 14 days longer residual weed control than competitors’ preemergent herbicides.
Step 2: Bridge the gap
Fourteen to 28 days after a preemergence application of Authority Supreme herbicide or Authority Edge herbicide, soybean growers can apply Anthem® MAXX herbicide, which also contains pyroxasulfone. Compared to other Group 15s that contain dimethenamid and S-metolachlor, pyroxasulfone has a 50% longer half-life equaling a longer duration of control on a broad spectrum of both grasses and broadleaf weeds. This makes it a flexible tool for growers facing multiple weed pressures like tough-to-control Palmer amaranth and waterhemp.
See long-lasting results
Overlapping residual herbicides from FMC are built with the best active ingredients to meet soybean growers’ weed control needs, helping deliver long residual control for a better return on investment. When compared to a single-pass postemergence program, overlapping residual herbicides from FMC yield 8.3 bushels more. Deploying the overlapping residuals herbicide program from FMC amounts to less weed escapes, less weed seed and more value on every acre.
To learn more about getting your soybean season from planting to canopy closure with the FMC overlapping residuals program, talk to your local FMC retailer or visit LOCKIN.AG.FMC.COM.
Always read and follow all label directions, precautions and restrictions for use. Some products may not be registered for sale or use in all states. FMC, the FMC logo, Anthem and Authority are trademarks of FMC Corporation or an affiliate. Zidua and Outlook are trademarks of BASF. Dual, Tendovo and Prefix are trademarks of a Syngenta Group Company. ©2025 FMC Corporation. All rights reserved. 24-FMC-0235 01/25
