Next-Level Defense Against Palmer Amaranth, Waterhemp & Pigweed Species
Convintro is specifically designed to control Palmer amaranth and Waterhemp, making a valuable addition to your pre-emergent herbicide solution.
Crop ScienceUnited States
Convintro™ Pre-emergent Herbicide for Corn & Soybeans
Convintro™ is the breakthrough pre-emergent herbicide designed for resistant Palmer amaranth and Waterhemp control. Stop aggressive pigweed species before they break the surface, and protect your crop with a new standard in resistance management.
Convintro™: Targeted Weed Control
Aggressive weeds demand a solution that's equally tough. That's why we're proud to introduce Convintro. Powered by a new active ingredient in the U.S. and a distinctive mode of action, this herbicide offers protection that can boost the ability to control targeted pigweed species.
Approved In: AL, AR, CO, CT, DE, GA, IA, ID, KY, LA, MO, MS, NC, NE, NV, OH, OK, PA, RI, TN, UT, VT, WY
1
Breakthrough Active Ingredient
Convintro features Diflufenican (DFF), a new active ingredient for corn and soybeans in the U.S.
2
Innovative Site of Action
With a different site of action (Group 12*) in corn in North America, Convintro offers a crucial new tool for integrated weed management.
3
Flexible Tank Mix Compatibility
Convintro is compatible with a wide range of pre-emergent herbicides for both corn and soybeans, giving you the flexibility to build a custom weed control program.
*Group 12 selective contact and residual herbicides have been used effectively in Europe and Australia in cotton, cereals, and lentils for years. Group 12 has limited use in North America, mainly in cotton, permanent crops, citrus, and Alfalfa.
Specialized Management of Superweeds
Formulated to target the fastest-growing resistant weeds in the U.S., Convintro delivers focused Amaranthus species control with limited dicot activity.
- Palmer amaranth (Amaranthus palmeri)
- Redroot pigweed (Amaranthus retroflexus L.)
- Prostrate pigweed (Amaranthus blitoides)
- Smooth pigweed (Amaranthus hybridus)
- Common waterhemp (Amaranthus rudis)
- Tall waterhemp (Amaranthus tuberculatus)
Proven Weed Control Across Corn & Soybeans
Field results speak for themselves. Convintro is designed to fit easily into your pre-emergence program, advancing weed control that gives your corn & soy crops the edge they need to succeed season after season.
The potential of Convintro's weed management stands out in this 42-day trial. The difference in control is notable between Convintro tank-mixed with Mauler® versus Warrant®, and the three-way combination of Convintro + Mauler® + Warrant® delivers the most impressive results.
This data was recorded at 42 DAA during a 2025 Bayer internal trial led by John Schramski in West Lafayette, IN. All herbicide treatments were applied at pre-emergence.
A Tank Mix Advantage
Convintro's strength shows in its performance in tank mixes. In North American trials, it’s added value to integrated pre-emergence herbicide programs, demonstrating both compatibility and a boost in efficacy.
Convintro has proven its superior Amaranthus management in soybeans when tank mixed. Here, while Mauler® + Warrant® delivered 91.9% control, combining Convintro with those herbicides pushed performance to 95.8%.
This data was recorded in 2025 during a set of Bayer internal trials across North America, between 32-38 days after application. All herbicide treatments were applied at pre-emergence. Use rate was 1x per soil type, unless otherwise noted.
Foliar Response & Recovery
After crop emergence, growers may notice a bleaching effect on the first few leaves. This is a normal and temporary response. According to Bayer internal trials, these marks have been shown to dissipate with new crop growth. On average, this response hasn’t demonstrated a statistically significant impact on yield.
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Video taken on the trial plots of C. Evans in Nortonville, IL in 2025.
ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS.
Performance may vary, from location to location and from year to year, as local growing, soil and environmental conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on their growing environment.
The recommendations in this material are based upon trial observations and feedback received from a limited number of growers and growing environments. These recommendations should be considered as one reference point and should not be substituted for the professional opinion of agronomists, entomologists or other relevant experts evaluating specific conditions.
The distribution, sale, or use of an unregistered pesticide is a violation of federal and/or state law and is strictly prohibited. Check with your state department(s) of agriculture, local dealer or representative for the product registration status in your state. Not all products are registered for use in all states and may be subject to use restrictions. Harness® Herbicide and Harness® MAX Herbicide are registered trademarks of Bayer Group. Mauler® is a registered trademark of Valent U.S.A. Corporation. Bayer, Bayer Cross, Convintro™ and Warrant® Herbicide are trademarks of Bayer Group. For additional product information call toll-free 1-866-99-BAYER (1-866-992-2937) or visit our website at www.BayerCropScience.us. Bayer CropScience LLC, 800 North Lindbergh Boulevard, St. Louis, MO 63167. ©2026 Bayer Group. All rights reserved.