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Flag Smut

Urocystis tritici

Urocystis tritici

Photo by D. Chalkley,  ARS, USDA. /sbmlweb/fungi/index.cfm

Survey Information

Flag smut (Urocystis tritici) can potentially have a significant impact on trade as the U.S. yearly exports approximately eight million tons of wheat worth $1.7 billion to fifteen countries where flag smut is considered a quarantine pest.  Bread wheats are the primary hosts of flag smut fungi.  The disease is found in winter wheat areas and in cool, fall-sown spring wheat areas.

The Wyoming Stripe Rust Survey was added to the Small Grains Ug99 Rust Survey conducted by the Wyoming CAPS Program in 2015 after flag smut was found in Kansas in May 2015.  Wheat and barley fields are visually surveyed throughout the growing season.  Any suspect material found is sent to the University of Wyoming, Department of Plant Sciences for further identification.  Some fields are selected for a more intensive sampling effort, where twenty plants are randomly selected from each field for further examination.



Contact Us

WY CAPS Program

University of Wyoming

Dept. Ecosystem Science & Management: 3354

1000 East University Ave.

Laramie, WY 82071

Phone: (307)766-5278


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1000 E. University Ave. Laramie, WY 82071
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