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Foxtail Barley Control (07/23/15)

The following information is from email correspondence with Dr. Rod Lym, NDSU Weed Scientist. Question: What are some good recommendations for control of foxtail barley in pasture - what about tips when applying Plateau and is this a good option?

Foxtail Barley Control

The following information is from email correspondence with Dr. Rod Lym, NDSU Weed Scientist.

Question:  What are some good recommendations for control of foxtail barley in pasture - what about tips when applying Plateau and is this a good option?

Answer:  There are not a lot of good options here since we lost Atrazine for pasture use. Plateau and Oust are the only two herbicides I know about for foxtail barley control in pasture, but the application window is gone for this season. Both herbicides need to be applied in late-May to early June when the plant is rapidly growing, but not yet setting seed.

Plateau should be applied at 8 to 12 oz/A. Some people split the application into 6 oz/A twice which improves control and helps prevent the plant from going to seed. The application time would be once in May and then again in June.

Oust should be applied at 1.3 to 2 oz/A. Oust is a very broad spectrum herbicide that will control many broadleaf plants in pasture and may reduce desirable grasses as well, especially during dry years.

The only other option is spot treatments with Roundup, which is only practical for small patches. I suggest the land manager flag the areas now for treatment next spring.

Rich Zollinger

Extension Weed Specialist

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