Parts of Virginia Under Increased Risk for Fusarium Head Blight
April 13, 2020
Most of our wheat in Virginia has just begun to head; early lines planted at the Eastern VA AREC in Warsaw started heading around April 9-10. According to the National FHB Risk Assessment Tool, FHB risk for wheat flowering April 9-13 is medium to high for parts of Eastern Virginia, including the Northern Neck, middle peninsula, and Tidewater.
The in-season risk map allows the user to go to their area and determine the risk (low, medium, high) of FHB in their area based on whether they have a susceptible, moderately susceptible, or moderately resistant variety. The estimated FHB risk is based on the probability of an FHB epidemic with greater than 10% field severity using relative humidity data 15 days prior to flowering. The above figure shows a medium to high risk for susceptible varieties flowering on April 13. However, if moderately resistant varieties are planted, the FHB risk is low.