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Features, Advantages, and Benefits of Capreno® Herbicide + DiFlexx® Herbicide or Stinger® HL Herbicide for Canada Thistle Control in Corn

June 12, 2025

Introduction

Canada thistle (Cirsium arvense) is a persistent weed that must be managed effectively to prevent it from impacting corn yield potential. This bulletin outlines the features, advantages, and benefits of using Capreno® herbicide in combination with DiFlexx® herbicide or Stinger® HL herbicide for managing Canada thistle in corn.

Canada thistle should be controlled when it is less than 6 inches tall. Image courtesy of Phil Westra, Colorado State University, Bugwood.org
Figure 1. Canada thistle should be controlled when it is less than 6 inches tall. Image courtesy of Phil Westra, Colorado State University, Bugwood.org.

Active Ingredients

Capreno® Herbicide: 5.6% Thiencarbazone-methyl and 28.3% Tembotrione.

DiFlexx® Herbicide: 56.6% Diglycolamine salt of Dicamba with Cyprosulfamide safener.

Stinger® HL Herbicide: 60.22% Clopyralid.

Features

Broad Spectrum Control

Both Capreno® Herbicide and DiFlexx® Herbicide are effective against a wide range of broadleaf weeds, including Canada thistle, waterhemp, Palmer amaranth, and other herbicide-resistant species. In place of DiFlexx® Herbicide, Stinger® HL Herbicide may be used as an option for controlling Canada thistle.

Multiple Modes of Action

Either option provides three sites of action, which help manage herbicide resistance.

Option 1: Capreno® Herbicide (Group 2 & 27) + DiFlexx® Herbicide (Group 4)
Option 2: Capreno® Herbicide (Group 2 & 27) + Stinger® HL Herbicide (Group 4)

Flexible Application Timing

The combination of Capreno® Herbicide + DiFlexx® Herbicide or Stinger® HL Herbicide can be applied post-emergence from the V1 to V7 corn growth stage or before the corn plants are 20 inches tall, whichever occurs first.

Advantages

Enhanced Weed Control

The combination of Capreno® Herbicide + DiFlexx® Herbicide or Stinger® HL Herbicide helps improve the control of Canada thistle.

Improved Crop Safety

These products are designed to help minimize crop injury while effectively controlling target weeds.

Resistance Management

Utilizing multiple herbicides with different modes of action helps prevent the development of herbicide-resistant weed populations.

Benefits

Increased Yield Potential

Effective control of Canada thistle helps protect yield potential and crop health.

Cost Effective Solution

Effective weed control can be achieved by using Capreno® Herbicide + DiFlexx® Herbicide or Stinger® HL Herbicide, which can potentially reduce the need for additional applications.

Simplicity in Application

The recommended use rates and timing allow for straightforward integration into existing weed management programs.

Recommended Use Rates for Post-emergence in Corn

  • Capreno® Herbicide
    • Apply at a rate of 3.0 fl oz per acre for effective control of Canada thistle.
    • Apply in a tank mix with either DiFlexx® Herbicide or Stinger® HL Herbicide postemergence to corn from the V1 to V7 growth stage or before the corn plants are 20 inches tall, whichever occurs first.
  • DiFlexx® Herbicide
    • The labeled application rate is 6 to 16 fl oz per acre, though a rate below 8 fl oz per acre controls or suppresses certain broadleaf weeds.
  • Stinger® HL Herbicide
    • Apply at a rate of 0.2 to 0.4 pints per acre when thistles are greater than 4 inches tall or across, but before the bud stage.

Conclusion

The combination of Capreno® Herbicide + DiFlexx® Herbicide or Stinger® HL Herbicide offers a robust solution for controlling Canada thistle in corn. By leveraging the strengths of these products, growers can help to enhance their weed management strategies and help to protect yield potential.

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