Most wheat south of I-40 has flowered and north of I-40 has or will be flowering over the next week. West and Middle Tennessee are still at low risk for FHB, with some medium risk in East Tennessee. Although there might be an increase in risk with the rain that some areas are receiving, especially if wheat is flowering during that time. Specifically, rain coupled with the warmer temperatures could equate to higher FHB risk for wheat in the northern half of the state where wheat is blooming or about to bloom. Application of a triazole fungicide, like Caramba or Prosaro, can be applied at beginning bloom (FK10.5.1) or shortly after to reduce FHB infection.
--Heather Young-Kelly, Extension Plant Pathologist, University of Tennessee
For more details, go to the FHB Risk assessment tool at http://www.wheatscab.psu.edu