FHB has been observed in winter wheat in the southern portion of the state.
Many areas have had high rainfall with frequent storm activity. This is contributing to high relative humidity and high risk of FHB as well as other fungal diseases in these areas. The risk map is currently trending high risk for susceptible and moderately susceptible spring wheat varieties across the southern half of the state with some high risk areas also located in the North central area of the state. Awn infections have been observed in commercial fields of spring wheat in the Northwest of the state. Treatment with fungicide should be considered when the majority of spikes have reached early flowering. However, fungicide applications made 4- 7 days after first flowering can still have some efficacy , if conditions have made spraying at early flowering impossible. However, remember to check labels for current use restrictions and pre-harvest intervals which must not be exceeded.
–Madeleine Smith, Plant Pathologist, University of Minnesota
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
Source: University of Minnesota: Madeleine Smith, Plant Pathologist