VIEW TOP VILLAINS IN YOUR AREA AND HOW TO COMBAT THEM

When pressure rises how will you take action? Trust Cargill’s experts to help you identify weed pressures and recommend a mix of tools, techniques and treatments to cut through the chaos and get you back on track. Use the tool below to select your worst weed villain. Then review our suggestions to try in your field. Reach out to your Cargill rep for more info.

Canada Thistle

DIFFICULTY RATING

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High

SUPERPOWER

Those underground rhizomes! There is as much living material underground as above.

DESCRIPTION

A perennial weed with a super strong root system, Canada thistle does not emerge in time for a pre-seed burnoff. If allowed to mature, it is instantly recognizable with its spiny rosette and trademark purple flowers. It grows in dense patches with many plants sharing the same root system.

HOW TO DEFEAT THIS VILLAIN

Crop Choice

Canola - Use a high registered rate of herbicide (especially in Roundup Ready® canola) and you will get season-long control with enough regrowth to get them in fall.

Cereals - You have two options: 1. Burn off the top of the weeds in-crop, or; 2. Use recommended products in-crop for season-long control, allowing for enough regrowth in the fall that the plants will take up a post-harvest herbicide application.

Peas & Lentils - Choose a field with little to no Canada thistle because there's no hope of controlling in-crop.

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HERBICIDE

  • A high rate of Liberty® (1.6 L) or a two-pass strategy in canola will burn off the top. *Pro Tip: a water rate of 12-15 gallons will take Liberty's control to the next level.

  • In Roundup Ready canola, a two-pass strategy with Roundup Transorb® at 0.33 L (twice), then a 1.5 L rate post-harvest is your best bet for control.
  • Cirpreme® will control Canada thistle in-crop. 

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SECRET WEAPON

While it does add cost to your weed control regime, the one-two punch of herbicide application to burn off the top of Canada thistle followed up with a post-harvest application of Roundup Transorb at 1.5 L/ac is your best bet for control.

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CONTROL TIMING

It’s best to control Canada thistle in the fall, when the plant is moving sugars down to the roots. It will move herbicide to the roots as well. These weeds are tough and can be expensive to control as they require a weakening application in-crop and a second application to fully control them.

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Always read and follow label directions.

DON'T SEE YOUR WEED HERE? LET US KNOW WHICH VILLAINS YOU'RE FACING.

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AGRONOMIST SEED PICKS

Cargill's agronomists have been touring farm fields across Canada, searching for the next breakout star or time-tested champion.

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CHOOSE THE RIGHT HERBICIDE FOR YOUR FARM

By pairing top products with the expertise of Cargill’s global network, you can create the perfect crop management solution for your farm.

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