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Understanding Formulations: Emulsifiable Concentrate (EC) vs. Suspoemulsion (SE)

Since introducing TZone™ SE Broadleaf Herbicide for Tough Weeds, we’ve discovered there is a misconception in the pest control industry that all liquid formulations are alike. It is important to understand the differences between an Emulsifiable Concentrate (EC) and a Suspoemulsion (SE) like TZone SE, because those differences can impact product performance.

Emulsifiable Concentrate (EC) Formulations

EC Formulation Diagram

An oil-based formulation containing active ingredients that are dissolved in solvents and emulsifiers. When added to the spray tank, an oil‑in‑water emulsion results.

  • Offers spontaneous emulsification on dilution
  • Delivers uniform application of active ingredient(s)
  • Can have an odor

Suspoemulsion (SE) Formulations

EW Formulation Diagram

A formulation of both liquid and solid active ingredients that readily disperses when diluted with water.

  • Combines multiple active ingredients with different solubilities or melting points
  • Superior mixing of SE eliminates tank mixing
  • Surfactant must support both solid and liquid active ingredients
  • Lower volatile organic compounds (VOCs)
  • Better compatibility with spray tank components

Proven Performance with TZone SE™

With seven decades in the industry, we know a few things about formulations. When we created TZone SE Broadleaf Herbicide for Tough Weeds, the advanced suspoemulsion formulation reduced driftable particles by up to 43% compared to an emulsifiable concentrate formulation. That means more active ingredient hits the target weed for better control.
TZone™ SE Broadleaf Herbicide for Tough Weeds
Z-Spray® Sprayer AI110025 Nozzle – 40 psi
PermaGreen™ Sprayer TF-VS-4 Nozzle – 40 psi
Z-Spray® Sprayer AI11004 Nozzle – 40 psi
PermaGreen™ Sprayer TF-VS-7.5 Nozzle – 40 psi
Data was obtained utilizing a vertically oriented low speed wind tunnel.

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