Tank-mixing Corvus® and Harness® Xtra Provides Powerful Control of Early Season Weeds

Successful season of corn fields after applying tank-mix of Corvus and Harnexx Xtra
Applying a tank-mix of Corvus herbicide and Harness Xtra herbicide at the time of planting helps to eliminate weeds, giving corn fields a strong start for a successful season.

Left unmanaged, early season weeds compete with young corn plants for resources including nutrients, water and sunlight. Often, this competition can result in reduced yields. To prevent yield loss, start the season strong with a pre-emergence herbicide application that incorporates multiple effective sites of action.

Use Multiple Effective Sites of Action to Attack Weeds in Various Ways

One key step to weed control is to ensure herbicides are attacking weeds in multiple ways. This is accomplished by finding complementary herbicides that use multiple effective sites of action. In fact, research from the University of Illinois suggests that growers who use an average of 2.5 effective sites of action per application are 83 times less likely to have herbicide-resistant weeds than those who use 1.5 effective sites of action per application.1

A tank mix of Corvus® herbicide with a Harness® Xtra herbicide includes a total of four sites of action to kill weeds in four different ways.

The active ingredients in Corvus herbicide work to kill weeds by:

  • Preventing carotenoid biosynthesis: Isoxaflutole (Group 27) prevents the synthesis of pigments in broadleaf and grass weeds, which results in plant death due to lack of chlorophyll and food production.
  • Inhibiting amino acid and synthesis production: Thiencarbazone-methyl (Group 2) inhibits the production of key amino acids in grass and broadleaf weeds that are essential to plant life.

Harness Xtra herbicides include acetochlor and atrazine. These active ingredients kill weeds by:

  • Inhibiting the growth of seedling shoots: Acetochlor (Group 15) is a soil-applied herbicide that inhibits cell wall elongation and shoot growth in emerging grass and small-seeded broadleaf weeds.
  • Inhibiting photosynthesis: Atrazine (Group 5) is readily absorbed in roots and leaves and inhibits processes related to food production, which ultimately leads to plant death. 

When tank-mixed together, Corvus herbicide and Harness Xtra herbicides can provide 95 percent or greater weed control in corn fields, on average, as demonstrated in research trials throughout the Midwest.2

Benefits of Tank-mixing Corvus® Herbicide and Harness® Xtra Herbicide

In addition to incorporating four unique sites of action, a tank mix of Corvus herbicide with a Harness Xtra herbicide offers the benefit of reactivation and excellent control of emerged weeds.

With as little as a half-inch of rain, Corvus reactivates to control tough-to-control grass and broadleaf weeds. When other herbicides stop working, Corvus delivers consistent season-long weed control thanks to the unique power of reactivation. It even works under various environmental conditions, such as drought or flood, reducing the likelihood of resprays.

The combination of proven herbicides provides excellent residual control of tough-to-control weeds. To learn more about what a tank mix of Corvus herbicide with a Harness Xtra herbicide offers, talk to your local Bayer representative.



ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Performance may vary, from location to location and from year to year, as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower’s fields.

Corvus® and Harness® Xtra are restricted use pesticides. Not all products are registered 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, the Bayer Cross, Corvus and Harness are registered 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 LP, 800 North Lindbergh Boulevard, St. Louis, MO 63167. ©2020 Bayer Group. All rights reserved.

Works Cited

  1. Henry, S. “Illinois: Tank Mixing Vs Herbicide Rotation To Stop Resistance?.” AgFax, 2015. https://agfax.com/2015/05/20/herbicide-resistance-tank-mixing-more-effective-than-rotation/
  2. Bayer Research Trials, 2019.
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