Wheat is beginning to progress into the heading and flowering stages in the Southern parts of the state, but risk of FHB remains low at this time. With wet weather expected for much of the week in Southeastern, Missouri, FHB risk may likely increase in the critical flowering stages. If a fungicide application is considered, the fungicides Prosaro and Caramba applied at Feekes 10.5.1 (50% of the plants in the field are beginning to flower) are considered the best options for FHB management. University research also has shown that the application of a fungicide up to 5 days after Feekes 10.5.1 may provide similar control. Strobilurin-containing fungicides are not labelled for control of Fusarium head blight and, if applied at later growth stages such as Feekes 10.5.1, may result in increased DON levels in the grain.
--Kaitlyn Bissonnette, Extension Plant Pathologist, University of Missouri
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