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Last Updated: 7/30/2026

Thunder Master®

Active Ingredient: Glyphosate , Imazethapyr

2x2.5 gal; 30 gal; 265 totes; bulk

Thunder Master® provides burndown and residual control of many broadleaf and grass weeds in soybeans and Roundup Ready® alfalfa. May be applied postemergence to Roundup Ready soybeans and Roundup Ready alfalfa for season-long weed control, or as a fall or spring burndown in CLEARFIELD® corn. Thunder Master is effective for difficult-to-control weeds common to no-till production, including marestail. When applied postemergence, Thunder Master not only controls existing broadleaf and grass weeds, it also provides control of susceptible weeds that may emerge after application.

Compare to: Extreme®

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    • Burndown plus the residual for control of many broadleaf and grass weeds in Roundup Ready soybeans and alfalfa.
    • Two modes of action to manage herbicide resistance.
    • Flexibility of use, may be applied preplant burndown, and early postemergence.
    • Apply postemergence in Roundup Ready soybeans and Roundup Ready alfalfa for season-long control.
    • Excellent residual control, resulting in fewer trips across the field.

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