Northeastern North Dakota has more wild oat weed resistance than any other part of the state. The resistance is to the Group One and Group Two herbicides. “From the samples that have been submitted, about 75 percent have been resistant to many of those herbicides,” said Brian Jenks, weed scientist. Wild oat thrives in the cool, wet conditions in the northeastern corner of the state. If resistance is an issue, the mode of action and the crop rotation should change. “For wild oat, the seed longevity is usually at least five years. If you can stay out of wheat for at least three or four years and come back to wheat when the wild oat population is decreased, you might have a better chance.”
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