Early planted wheat has started to flower in the southern part of Illinois. Although conditions have been cool, persistent rains continue to elevate levels of FHB risk in flowering, highly susceptible wheat varieties. Suggested fungicide products for suppressing FHB and vomitoxin include Prosaro, Caramba, Miravis Ace, and Proline (if following with vegetables). Replicated research indicates all of the suggested products are most efficacious in suppressing vomitoxin when applied between FGS 10.5.1 through 5 days after 10.5.1. FGS 10.5.1 is defined as the point where 50% of the main tillers have started to flower in a field. Ensure that all label directions are being followed to ensure proper application and to ensure performance. Do not apply fungicides that contain a strobilurin (FRAC group 11) as these have been associated with enhanced DON in replicated research trials. Continue to monitor your fields and the FHB prediction center as you approach the most critical times for applying in season fungicides for FHB.
-- Nathan Kleczewski Ph.D., University of Illinois, Research Assistant Professor and Extension Specialist
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