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Don’t Stray from the Proven Formulation

December 20, 2019
This agronomic image shows corn rows.

When it comes to corn weed control, we think it’s better to be safe than sorry. This year, some generic manufacturers encouraged corn growers to make their own “version” of Halex® GT herbicide by combining generic mesotrione with generic metolachlor. Unfortunately, those growers found out the hard way DIY tank mixes can cause serious damage to their crop and yield.

Generic Mesotrione vs. Metolachlor Crop Injury

If not formulated correctly, mesotrione injury can cause chlorosis, or bleaching, of plant leaves.

  • While only part of the plant may be chlorotic, the affected area may be stunted or fail to reproduce – and bleached leaves are more susceptible to scorching and leaf diseases.
  • If chlorosis is severe, the leaf veins may turn yellow, followed by leaf death, branch dieback, and loss of the entire plant.

Improper use of metolachlor can interrupt crop development by:

  • Preventing leaves from unfurling, and potentially forming “ladder-like” plants.
  • Inhibiting normal chlorophyll distribution, depriving leaves of sunlight and eventually causing them to emerge with bright yellow splotches.

Stand By the Standard Label Requirements

Halex GT herbicide has proven its work ethic in glyphosate-tolerant corn for many growing seasons, but DIY look-a-likes can’t control weeds the same way. What’s more, some rigged up mixtures are prohibited by the generic mesotrione tank label and EPA. We’re encouraging you to stick with the proven Halex GT formulation of mesotrione, S-metolachlor and glyphosate to not only control grass and broadleaf weeds until crop canopy, but also to keep you, your crop and consumers safe. Halex GT uses 3 modes of action to manage herbicide resistant weeds, and application at the proper timing can provide an additional 12 bu/A.*

To learn more about the legacy of Halex GT, visit HalexGT-Herbicide.com.

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Syngenta hereby disclaims any liability for Third Party websites referenced herein.

All photos are either the property of Syngenta or are used with permission.

Product performance assumes disease presence.

Performance assessments are based upon results or analysis of public information, field observations and/or Syngenta evaluations.


*2014 Syngenta university sales support trial: Ames, Iowa; Plot size: 10 ft x 25 ft; Replications: 3; Weeds present: waterhemp, velvetleaf, lambsquarters, cocklebur, and giant foxtail; Halex GT + AAtrex rates and adjuvants: Halex GT at 3.6 pt/A + AAtrex at 1 pt/A + AMS at 8.5lb/100 gal + NIS at 1qt/100gal; NOTE: Dual Magnum® at 1pt/A was applied pre-emergence to all treatments.