Illinois FHB update. Nathan Kleczewski Field Crop Plant Pathologist, UIUC
Some of the earlier planted wheat in the southern portions of the state may be heading by the end of this week. After heads have cleared the ligule, you generally have 3-5 days before the start of flowering (Feekes growth stage (FGS) 10.5.1.). Forecasts are not calling for significant rain over the next 10 days as of today (4/28), and the current risk for moderately susceptible wheat heading into flowering within the next 3-5 days should remain low. Continue to scout fields and monitor this site for updates as your wheat in these areas enter the critical period for FHB. If considering a fungicide, suggested products include Prosaro, Caramba, Miravis Ace, and Proline (if following with vegetables). Replicated research indicates all of the suggested products are most efficacious in suppressing DON 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.
--Nathan Kleczewski Ph.D., 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