Counter Later Emerging Weeds With Overlapping Residuals
Control Tough Soybean Weeds with Overlapping Residual Herbicides
Starting with a clean seedbed is important, but it’s often not enough to eliminate early-season weed competition. Tough weeds like Palmer amaranth and waterhemp can emerge throughout the growing season, making them especially difficult to control.
These yield-robbing weeds are known for:
- Rapid growth rates
- Extended germination windows
- Resistance to multiple herbicide modes of action
Why Early Control Isn’t Enough
Even after a preemergence herbicide application, soybean growers frequently face continued weed pressure.
“Palmer amaranth and common waterhemp are difficult to control because of their continued emergence at a time when many preemergence herbicides have played out,” says John Pawlak, Senior Project Development Manager at Valent U.S.A.
This challenge becomes even greater in wet conditions, where herbicides can break down more quickly.
As a result, relying on a single application strategy often leaves a gap in control.
Bridge the Gap with Residual Control
To maintain clean fields through canopy closure, growers need overlapping residual herbicide programs.
Following a preemergence application with a postemergence herbicide that provides long-lasting residual activity helps:
- Extend weed control during critical growth stages
- Manage herbicide resistance
- Protect yield potential
Between planting and canopy closure, this layered approach is essential to keeping fields weed-free.
Why Overlapping Residuals Matter
- 8+ weeks of weed control are needed before soybean canopy can effectively suppress Palmer amaranth and waterhemp
- Without extended control, late-emerging weeds can quickly reduce yield potential
This is why a postemergence solution with residual activity is critical.
A Flexible Solution: Perpetuo® Herbicide
Learn more about Perpetuo® Herbicide
Perpetuo® Herbicide is a flexible postemergence option designed to provide long-lasting residual control of tough weeds.
Key Benefits
- Controls emerged and not-yet-emerged weeds
- Targets Palmer amaranth, waterhemp, velvetleaf and other small-seeded broadleaf and grass weeds
- Provides both burndown and residual activity
- Offers application and rotational flexibility
Active Ingredients
- Pyroxasulfone
- Flumiclorac
This combination delivers more complete weed control throughout the season.
Compatible with Modern Soybean Systems
Perpetuo® Herbicide fits seamlessly into today’s soybean production systems and can be used with:
- Xtend®
- Enlist®
- Roundup Ready® systems
It is also tank-mix compatible with many crop protection products, giving growers flexibility in building their herbicide programs.
Key Takeaway
Palmer amaranth and waterhemp require more than a one-pass solution. By implementing overlapping residual herbicide programs, growers can extend control through canopy, manage resistance and protect yield potential.