Can you fit glyphosate-tolerant canola in a Roundup Ready rotation?

Written by Laura Sytnyk on Jul 12 2018

Here’s how to handle the Roundup Ready trifecta

What is the fit for glyphosate-tolerant (otherwise known as Roundup Ready® (RR)) canola? In a rotation that could already be filled with RR soybeans and corn, it could seem like this crop is no longer a viable option. If you do it right, you can still make it work and even make sure it’s an agronomic success.

When choosing a canola hybrid you must look beyond herbicide tolerance. All canola hybrids are not created equal, and a selection of genetic traits can be important to you.

  •        Disease package: Depending on your location and how tight your rotation is, blackleg or clubroot resistance may be a necessity. For example, DEKALB lists their blackleg-resistant genes and uses an enhanced multi-genic blackleg resistance approach with their 74-44 BL.
  •        Standability: For those who still swath, a variety that stands well might be the driving factor behind a canola hybrid decision.
  •        Pod Integrity: For those who straight cut but want to switch up varieties from the typical L140P or L233P, there are RR varieties that are suitable for straight cut and DEKALB’s 75-65 is a great example of increased pod integrity.
  •        Historical performance: At the end of the day, yield tends to be what drives buying decisions. Look into the varieties that perform well in your area.

Ultimately, with the rise of glyphosate-resistant weeds like kochia, glyphosate should never be applied on its own. The last thing anyone wants is widespread resistance, but you can use this as an opportunity. If you need to put multiple herbicide groups in the tank anyway, it opens up an opportunity to keep RR canola in your rotation.

You can no longer look at weed control on those RR acres as multiple applications of glyphosate. Instead, consider the other options that can be tossed in the tank with glyphosate.

For example:

  •        Viper® on soybeans adds in Groups 2 and 6.
  •        Atrazine and Armezon® on corn adds Groups 5 and 27. 
  •        Lontrel™ on canola adds Group 4. 

Once you start to tank mix, you will discover that there is a variety of options for herbicides with different modes of action that can help reduce your risk of developing glyphosate resistance, even if you’re growing the Roundup Ready trifecta. The list above doesn’t take into account the myriad pre-seed options (Groups 3, 4, 6, 14, 15, all depending on the product of choice).

If you’re open to considering Roundup Ready canola along with your RR soybeans and corn, call your local Cargill agronomist to discuss canola hybrids and best practices for growing glyphosate-tolerant varieties on your farm.

Roundup Ready® and DEKALB®  are registered trademarks of Monsanto Technology LLC, Monsanto Canada Inc. licensee. Viper® and Armezon® are registered trade-marks of BASF SE. Lontrel™ is a trademark of The Dow Chemical Company.

Tags: Canola, Roundup Ready, Disease, Soybeans, Corn

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