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Last Updated: 8/23/2026

Surmise® Pro

Active Ingredient: Glufosinate-ammonium

4 x 1 gal, 2 x 2.5 gal

Surmise® Pro is a postemergence, non-selective, herbicide that mixes readily with water to be applied as a spray for the control of broadleaf weeds and grasses. A group 10 herbicide (glutamine synthetase inhibitor), Surmise Pro is a foliar-active material with little or no soil-residual activity. Visual results showing necrosis of leaves and young shoots occur within 2 to 4 days after application under good growing conditions.

Surmise Pro is rainfast four (4) hours after application to most weed species; therefore, rainfall within four (4) hours may necessitate retreatment or may result in reduced weed control.

Compare to: Finale® XL

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    • More than 2X the strength of Finale® herbicide.
    • Provides control of a wide variety of emerged annual and perennial broadleaf weeds and grasses.
    • Excellent tank mix partner with preemergence herbicides such as prodiamine, oryzalin and oxadiazon.
    • Effective pre-plant treatment for turf, ornamentals, and greenhouses due to minimal soil residual.
    • Reduced translocation enables ability to create and maintain clear boundaries around golf turf, sand traps, and athletic fields and accurate application areas around existing ornamentals in landscape beds.
    • Excellent rotation herbicide for managing existing or developing resistance issues.

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  • ACTIVE INGREDIENT
    24.5% glufosinate-ammonium

    HRAC GROUP
    10

    FORMULATION
    Liquid soluble concentrate

    CHEMICAL FAMILY
    Group 10 herbicides (glutamine synthetase inhibitor)

    COMPARE TO
    Cheetah® Pro

    MODE OF ACTION

    Glutamine synthetase inhibitor

    RESTRICTED USE
    No

    SIGNAL WORD
    Caution

    PACKAGING INFORMATION
    4 x 1 gal, 2 x 2.5 gal

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