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Last Updated: 8/24/2026

Surmise® SpeedPro™ XT

Active Ingredient: Glufosinate , Pelargonic Acid , Imazethapyr

12 x 1 qt, 4 x 1 gal, 2 x 2.5 gal

Surmise® SpeedPro™ XT combines the broad-spectrum power of glufosinate and enhanced speed of pelargonic acid with the long-lasting control of imazethapyr. This powerful trifecta is an excellent alternative to glyphosate herbicides and provides quick knockdown and superb non-selective control of a variety of annual and perennial weeds for at least three months. Surmise SpeedPro XT is an ideal solution for weed management along driveways, parking lots, right-of-way areas, fence rows, and a variety of other non-crop areas.

Do not use Surmise SpeedPro XT on desirable foliage or young plants, fruit or vegetable plants, in lawns or for lawn renovations, or in areas that will be planted or seeded within three months.

A FIFRA 2(ee) recommendation has been issued for the use of Surmise SpeedPro XT to control Puncturevine (Goathead). Download the bulletin here.

Compare to: Proprietary formulation

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    • Quick knockdown, excellent systemic control.
    • Residual control for at least 3 months.
    • Provides control of a wide variety of emerged annual and perennial broadleaf weeds, grasses, and sedges.
  • FL TX NM AZ AK CA NV UT CO OR WA ID HI OK MT WY ND SD NE KS MN IA MO AR LA MS AL GA SC IL WI MI IN OH TN KY NC WV VA PA NY ME VT NH RI CT NJ DE MD MA DC

    Registered

    Not Registered

  • ACTIVE INGREDIENTS
    10.0% Glufosinate-ammonium
    11.08% Ammonium-nonanoate
    3.18% Imazethapyr-ammonium

    HRAC GROUPS
    Glufosinate – 10
    Pelargonic acid – 27
    Imazethapyr – 2

    FORMULATION
    Soluble liquid concentrate

    CHEMICAL FAMILY
    Phosphinic acid, fatty acid, imidazolinone

    COMPARE TO
    Proprietary formulation

    MODE OF ACTION
    Glutamine synthase inhibitor, HPPD inhibitor and ALS inhibitor

    RESTRICTED USE
    No

    SIGNAL WORD
    Warning

    PACKAGING INFORMATION
    12 x 1 qt, 4 x 1 gal, 2 x 2.5 gal

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