sprayer in field

The Benefits of Selecting a Pre-Emergent Residual Herbicide to Control Weeds

May 24, 2022 10:30 a.m.

By Bayer Crop Science

The Pre-Emergent Opponent

After planting, there is one sight every grower dreads to see—weeds. It can be especially troubling when young weeds are visible before the crop even has emerged. These early season weeds pose one of the greatest threats to corn plants. If left unmanaged, they will compete with corn for sunlight, water and nutrients, often resulting in reduced yields and lower profits.

Start Your Growing Season with Strong Choices

One of the most promising ways to eliminate early season weed competition is by applying a pre-emergence herbicide with strong residual control such as TriVoltTM herbicide. This herbicide application will control winter annual weeds before they get to a size that makes them difficult to treat as well as control early emerging spring weeds1. Managing winter annual weeds early in the season using a pre-emergent herbicide with multiple modes of action can reduce the risk of herbicide resistance developing due to the early control of those weeds such as Horseweed (marestail).

Pre-Emergent Herbicide Data

What are the Benefits?

Benefits of a pre-emergent herbicide application go beyond management of specific weed species. Stress at emergence from early season weeds that are not well managed can reduce yield potential. Soil moisture and crop nutrients are maintained in the soil profile and available to the emerging crop instead of being taken up by the weeds2.

As part of a two-pass system, a pre-emergence herbicide application can also mitigate the development of herbicide resistant weeds. It is recommended to incorporate multiple and different effective sites of action into the tankmix. With this approach, weeds are targeted in multiple ways for early season weed control. When weeds are successfully managed at time of planting, the risk of developing herbicide resistance is reduced considerably.3

Bayer Solutions for Pre-Emergence Weed Control

As a new selective corn herbicide from Bayer, TriVolt™ brings built-in resistance management and consistently high levels of weed control for corn growers. TriVolt™ contains three different active ingredients: Thiencarbazone, Flufenacet and Isoxaflutole from Groups 2, 15 and 27 herbicides, respectively. This proprietary combination provides burndown and residual activity for up to 8 weeks through a variety of weather conditions. When tank-mixed with Atrazine, TriVolt™ delivers 4 different sites of action to help combat troublesome grass and broadleaf weeds, such as Waterhemp, Foxtail species, Common ragweed, Kochia and Palmer Amaranth.

TriVolt™ is still pending certain state approvals. Call to check approval status in your state.

Bayer Solutions for Pre-Emergence Weed Control

ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. TriVolt™ is a restricted use pesticide. Not all products are registered for use in all states and may be subject to use restrictions. 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 local dealer or representative for the product registration status in your state. Bayer, Bayer Cross, Harness®, Laudis® , Roundup PowerMAX® and TriVolt™ are trademarks of Bayer Group. All other trademarks are the property of their respective owners. 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 LP, 800 North Lindbergh Boulevard, St. Louis, MO 63167. ©2022 Bayer Group. All rights reserved.

  1. Burndown herbicide programs for corn and soybeans. Weed Control Guide for Ohio, Indiana, and Illinois. extension.cropsciences.illinois.edu.
  2. Jhala, A., & Kruger, G. “Why Residual Herbicides are Important tools in Battling Hard-to-Control Weeds.” Nebraska CropWatch, 2015. https://cropwatch.unl.edu/why-residual-herbicides-are-important-tools-battling-hard-control-weeds
  3. “Diversifying herbicide modes of action.” Getting Rid of Weeds through Integrated Weed Management, 2018. http://integratedweedmanagement.org/index.php/iwm-toolbox/chemical-practices/