Guardian Plus II Mega


Guardian™ Plus II Mega pre-emergent herbicide gets your soybeans off to a clean, weed-free start. Get knockdown and enhanced residual activity on the toughest broadleaf weeds: Eastern black nightshade, herbicide-resistant pigweeds and lamb’s-quarters, dandelion, annual sow thistle, yellow nutsedge (suppression) and more.

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Guardian Plus II Mega, a pre-emergent herbicide, delivers knockdown and enhanced residual activity on the toughest broadleaf weeds in soybeans.


Enhanced control of tough weeds

Highly effective for pre-emergent burndown in IP, conventional and glyphosate-tolerant soybeans, you’ll get all the weeds that glyphosate controls, plus Eastern black nightshade, herbicide-resistant (Group 2 and triazine) pigweeds (green and redroot) and lamb’s-quarters, dandelion, annual sow thistle, hairy nightshade, prickly lettuce, ragweed and velvetleaf. You’ll also get enhanced suppression of yellow nutsedge, green foxtail, volunteer adzuki beans and wild carrot.

Excellent tool for resistance management

Guardian Plus II delivers three groups of chemistry (Group 2, Group 9 and Group 14), packaged in a convenient 400-acre tote.

Three-way mode of action

Three modes of action for weed resistance management in IP or GT soybeans.

Planned post-emergent application

Apply as part of a 1-pass pre-emergent program or as a first pass pre-emergent treatment ahead of a planned post-emergent application of Assure II for volunteer corn and grass control.


Below lists the crops that Guardian Plus II Mega herbicide can be used on.


Soybean (Glycine max)


Now registered in the following provinces:

  • Registered
  • Unregistered

Technical Specifications

  • Application Method
    Aerial: Not registered for aerial application.
  • Approved Use
    • Refer to the Guardian Plus II Mega label for complete use instructions.
    • Refer to the Controlled Weeds list for the full list of weeds.
  • Rates
    One Guardian Plus II MEGA tote treats 400 acres.
  • Herbicide Group
    • Group 2
    • Group 9
    • Group 14