Halex GT Herbicide

Halex GT Herbicide

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Product Overview

Halex GT Herbicide is a systemic herbicide that effectively controls undesirable weeds in glyphosate-tolerant crops. Contains three active ingredients which are powerful in eliminating weeds in corn fields. A combination of herbicides mesotrione, S-metolachlor, and Glyphosate. Halex GT Herbicide is both a pre-emergent and post-emergent herbicide. It is a powerful pre-emergent herbicide for controlling unwanted weeds in grain sorghum. Targets weeds including carpetweed, wild oats, pennycress, panicum, pigweed, purslane, ragweed, potatoes, pokeweed, curly dock, shepherds purse, foxtail, and dandelion. It is absorbed through foliage and soil, preventing the growth of susceptible weeds after application. Visible results of dead weeds may be seen within two weeks.

Features and Specs

Active Ingredient S-metolachlor 20.50% Glyphosate 20.50% Mesotrione 2.05%
Target pests Amaranth, Atriplex, Barnyardgrass, Beggarweed, Bluegrass, Brome, Buffalobur, Burcucumber, Carpetweed, Cheat, Chickweed, Cocklebur, Crabgrass, Foxtail, Henbit, Kochia, Sunflower, Velvetleaf, waterhemp
For use in Corn, glyphosate-tolerant and Sorghum, Grain
Application Ensure that spray nozzle are uniformly spaced, the same size and type, and provide an accurate and uniform application. Use spray nozzles that provide medium to coarse droplet size to provide good coverage and avoid drift.
Pet safe Yes, if used as directed on Label
Formulation Professional Product
Group 15 9 27 Herbicide
NY, VT (Restricted to Commercial Applicators Only)
Special Features Uses three modes of action to manage herbicide-resistant weeds.
Shipping Weight 26.11 lbs
Manufacturer Syngenta
EPA Registration 100-1282



  1. Do not cultivate corn within 7 days before or after a Halex GT Herbicide application as weed control from the Halex GT Herbicide application may be reduced.
  2. Do not apply Halex GT Herbicide through any type of irrigation system.
  3. Do not apply Halex GT Herbicide with suspension fertilizers.
  4. Do not apply Halex GT Herbicide to glyphosate-tolerant corn with urea ammonium nitrate (UAN) as the carrier.
  5. Do not apply more than 4 pt of Halex GT Herbicide per acre per growing season to glyphosate-tolerant corn.
  6. Do not apply more than 6 pt of Halex GT Herbicide per acre per growing season to grain sorghum.
  7. Do not apply Halex GT Herbicide to the ground that has been or will be treated with Callisto in the same season.


For best results, apply Halex GT Herbicide to actively growing weeds. For the best protection of the corn crop’s yield potential, apply Halex GT Herbicide before the weeds exceed 4 inches in height or length. Susceptible weeds which emerge soon after an application of Halex GT Herbicide will be controlled for an additional 3-4 weeks.

  • Amaranth
  • Anoda
  • Atriplex
  • Barnyardgrass
  • Beggarweed
  • Bluegrass
  • Brome
  • Buckwheat
  • Buffalobur
  • Burcucumber
  • Carpetweed
  • Cheat
  • Chickweed
  • Cocklebur
  • Copperleaf
  • Corn
  • Crabgrass
  • Crotalaria
  • Croton
  • Crowfootgrass
  • Cupgrass
  • Dandelion
  • Dock
  • Eclipta
  • Foxtail
  • Galinsoga
  • Goosegrass
  • Groundcherry
  • Henbit
  • Horseweed
  • Jimsonweed
  • Johnsongrass
  • Lambsquarters
  • Morningglory
  • Mustard
  • Nightshade
  • Nutsedge
  • Oat
  • Panicum
  • Pigweed
  • Potato

*See label for the complete list of controlled weeds.


Always refer to labels of other pesticide products for mixing directions and precautions which may differ from those outlined here. Use in accordance with the most restrictive of label limitations and precautions. Do not exceed any label dosage rates. This product cannot be mixed with any product containing a label prohibition against such mixing. Do not tank mix Halex GT Herbicide with any other insecticide, fungicide, fertilizer solution, or adjuvant not listed on the label without testing compatibility, as poor mixing may result. Test the compatibility of any tank- mix combination on a small scale such as a jar test before actual tank mixing.

It is the pesticide user’s responsibility to ensure that all products are registered for the intended use. Read and follow the applicable restrictions and limitations and directions for use on all product labels involved in tank mixing. Users must follow the most restrictive directions for use and precautionary statements of each product in the tank mixture.

Follow the mixing instructions for adding Halex GT Herbicide to the spray tank:

Only use sprayers in good running condition with good agitation. Ensure the sprayer is cleaned according to instructions on the label of the product used prior to Halex GT Herbicide. Use only clean water for the spray solution. Ensure that all in-line strainer and nozzle screens in the sprayer are 50-mesh or coarser. Avoid using screens finer than 50-mesh.

When adding products to the spray tank, make sure each product is added separately and thoroughly agitated before adding the next product. If using an induction tank, add only one product at a time. For example, add water, then add atrazine to the induction tank and transfer to spray tank, rinse induction tank with water, then add Halex GT.

  1. Fill tank 1/2 full of clean water and start agitation.

  2. Add ammonium sulfate (AMS).

  3. Add nonionic surfactant (NIS).

  4. Add atrazine – make sure atrazine is fully dispersed before other products are added to the mix.

  5. Add fungicide (if applicable).

  6. Add Halex GT

  7. Add EC products (e.g. insecticides) last. Be aware that adding any EC type product will increase the risk of crop injury.

  8. Fill the tank with water to the desired level.

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Will Halex GT Herbicide kill brush, grass, and yard weeds?

Halex GT Herbicide is labeled for treating weeds and grasses  such as beggarweed, crabgrass and other listed weeds. It is not labeled for treating brush. 

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