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Resistance is Building

How Close are Your Fields to Wild Oat Group 1 or 2 Resistance?

How Close are Your Fields to Wild Oat Group 1 or 2 Resistance? - Avadex MicroActiv and Avadex Liquid EC

Wild Oat is the biggest weed problem facing Prairie growers this season. The last weed survey conducted quantified that each province has seen a continued rise in populations identified for resistance to different modes of action. The survey measured that Manitoba has 78% of samples resistant to Group 1 MOA herbicides. Saskatchewan (59%) and Alberta (58%). 

Group 2 resistance measured 43% in Manitoba, 40% in Alberta, and 32% in Saskatchewan. Unfortunately, simply rotating between these two modes of action is not as simple a solution as there are populations of wild oat that are resistant to both groups. 

The fact that every growing region in all three provinces has resistant wild oat populations to different modes means there is a high probability that your fields are at risk of having the same problem. 

How to Handle Herbicide Resistance 

There are several different ways to slow down and minimize the herbicide resistance in fields that have susceptible populations. The most crucial step is determining if any fields have Group 1 and/or 2 herbicide resistant populations of wild oats. Rotating and using different modes of action through herbicide layering is one of the best defense strategies. For example, using Avadex MicroActiv or Avadex Liquid EC soil-applied herbicides as part one of a sequential herbicide program is proven to be beneficial in the fight against weed resistance. 

When applied in the fall or spring before seeding, these Group 15 Avadex brand herbicides will reduce selection pressure of post-emergent herbicide applications and better manage post herbicide application timing and contribute to higher yield potential. 

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