North Central Research Extension Center


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May 12, 2010

Our first confirmed case of wheat streak mosaic virus (wsmv) came from samples collected in a winter wheat field on April 28 in Ward county.  Since then we have seen fields and samples showing moderate to high wsmv symptoms in Renville, McHenry, McLean, and Bottineau counties.  Our observations have led us to believe that winter wheat planted prior to Sept 25, 2009 is at the highest risk for infection. We have also found symptoms of this virus in spring wheat volunteers in the area.

Producers are potentially at a higher risk for infections in spring wheat and durum fields this growing season because of over wintering wheat volunteers. The key to successful management is control of volunteers with herbicides or tillage two weeks prior to planting.

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