A new disease symptomology observed in wheat is associated with high levels of Triticum mosaic virus transcripts.

Wheat is an important cereal crop globally and in the United States, and is the largest crop grown by acreage in Colorado. In June 2023, we observed wheat fields displaying severe yellowing and virus-like disease symptoms in plants across seven eastern Colorado counties (Yuma, Prowers, Kit Carson, Washington, Sedgewick, Morgan, and Weld). Symptomatic plants were prominent in fields and appeared bright yellow, with ringspots, mosaic patterning, and streaking on leaves.