Walking field fields in Tennessee, one might find some diseases including stripe rust, leaf rust, and head scab (fusarium head blight).

Dependent upon variety and if and when a fungicide was applied to wheat, leaf and head diseases may be visible and may affect yield. Although there is nothing to be done at this time (latest fungicides could be applied is bloom), it is still good to note what diseases are present. Both stripe rust and leaf rust may be seen on the leaves, with stripe rust starting to develop telia (dark colored spores) for long term survival and leaf rust still being able to develop in the hot temperatures. On the heads, dark blotches could indicate glume blotch and bleached out kernel showing salmon to orange colored areas indicate head scab.  More images and information can be found on the mobile friendly field guide at guide.utcrops.com