Eastern Nebraska wheat fields weren't significantly impacted by disease this growing season; however, due to abundant rainfall, western Nebraska and Panhandle growers have observed moderate levels of Fusarium head blight and severe tan spot.
Tan spot was identified in several fields recently surveyed in the Panhandle, and though Fusarium head blight hasn't been observed in fields yet, parts of western Nebraska are currently at high risk for infection.
The major factors that have impacted the wheat crop in 2022 are drought-like conditions — especially in western Nebraska, where freeze damage also caused significant injury — hail, and the virus diseases wheat streak mosaic and barley yellow dwarf.
The majority of fields visited in southern Nebraska this week had only trace levels of Fusarium head blight, but moderate to high levels of FHB were observed in susceptible varieties in a state variety trial in Red Willow County.
In southern Nebraska, Fusarium head blight has been observed. In other parts of the state, hot temperatures have slowed the development of new stripe rust, but heavily infected fields are now experiencing accelerated drying out of leaves.