When Weeds Won't Die — Ep. 5: Why You Must Mix It Up

Have we reached the point where glyphosate should not be applied alone at pre- or post-harvest?

It’s a stunning thought, isn’t it? In this fifth and final installment of the When Weeds Won’t Die series, Real Agriculture’s editor, Lyndsey Smith, asks Dr. Hugh Beckie this very important question. His answer? You’ll have to listen below to find out.

From a discussion on selection pressure, to rotating modes of action, to the very real fallout of not scouting, delaying or managing for resistance, Beckie, a seasoned weed scientist with Agriculture and Agri-Food Canada at Saskatoon, explains the importance of understanding herbicide modes of action and having a tank-mixing strategy. (See the bottom of this post for a great graphic on a 7-year herbicide/crop rotation example).

Click Here to Get to Know Your Herbicide Groups

Beckie and Smith also discuss why certain weeds are developing resistance faster than others and what risk factors farmers should know about. Do you worry more about glyphosate resistant kochia than mulit-mode-of-action resistant wild oats? You’re not the only one, and Beckie explains why, but why that could be dangerous, in the audio below.


 

An example of planning crops and herbicide groups with disease management & resistance in mind:

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