Guardian Plus II


Guardian™ Plus II pre-emergent herbicide gets your soybeans off to a clean, weed-free start. Get knockdown and enhanced residual activity on the toughest broadleaf weeds including 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, 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, dandelion, herbicide-resistant (Group 2 and triazine) pigweeds (green and redroot), lamb’s-quarters, 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 10-acre case.

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 herbicide can be used on.


Soybean, Glyphosate Tolerant (Glycine max)

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 label for complete use instructions.
    Refer to the Controlled Weeds list for the full list of weeds.
  • Rates
    One (1) case of Guardian Plus II treats 10 acres (4 ha).
  • Crop Rotation
    Replanting Interval (months)
    Refer to Product Guide.
  • Herbicide Group

    Group 2
    Group 9
    Group 14

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Labels (PDF)
Diligent Herbicide Label
Polaris Liquid Herbicide Label

Diligent étiquette principale
Polaris Liquid étiquette principale

Safety Data Sheets (PDF)
Diligent Herbicide SDS
Polaris Liquid Herbicide SDS

Diligent fiches signalétique
Liquide Polaris fiches signalétique

Additional Resource Material (PDF)
East Field Guide
Guide De Champ Est

Before use and for complete product information, please read and follow label directions.