Wheat in lower Delaware has finished flowering and wheat in Kent and New Castle counties range from head emergence through flowering. The entire state is at high FHB risk. If your wheat is flowering (yellow anthers visible on 50% of main tillers), it is advised to make a fungicide application for management of FHB. The advised window for fungicide application is flowering until 4-5 days after flowering. Fungicides for FHB include Caramba, Miravis-Ace, and Prosaro. Fungicides containing strobilurins should be avoided at this growth stage. Applications should be made at the full recommended rate in 15 gallons per acre (gpa) with 300-350 um droplet size for ground application and 5 gpa recommended for aerial application. Spray nozzles should be pointed toward the grain heads (30-45° angle from horizontal), with forward and backward mounted nozzles or nozzles with a two directional spray (Twinjet).
For more details, go to the FHB Risk assessment tool at http://www.wheatscab.psu.edu
For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org