In Missouri, FHB risk predictions have indicated that risk of infection was low throughout this past week as wheat has begun to flower in much of the southern part of the state. However, as the humidity begins to increase and the forecast calls for intermittent rain events, the risk of FHB could increase in some areas. 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.
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