Prefix - Herbicide Product & Label Information | Syngenta US
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The Flexibility to Control on Both Sides of Planting.

Effective when applied before or after planting, Prefix® herbicide offers the power and residual control to perform on both sides of planting.


Product Details

Prefix Herbicide

Extend residual activity against key grass and broadleaf weeds and maintain clean fields with Prefix® herbicide. Application flexibility enables Prefix to be applied either pre-emergence or early post-emergence in soybeans. It is also available as a dicamba herbicide tank-mix option.

Active Ingredients:

S-metolachlor, Sodium Salt of Fomesafen

Resistance Management:

Label Details

Use Rates
Weeds, Pests & Diseases
Special Labels
Worker Safety

    Restricted Entry Interval:

    PPE required for Applicators, Mixers or Loaders:

    PPE required for Early-Entry Workers:

    Product Benefits

    • Provides timely weed management using 2 different sites of action to manage key ALS- and glyphosate-resistant weeds
    • Delivers extended residual activity against key grass and broadleaf weeds
    • Provides excellent crop safety
    • Is available as a dicamba herbicide tank-mix option, expanding options for weed resistance management
    • Offers flexibility of pre- or early post-emergence application in soybeans

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