Wheat that is flowering now or in the next several days in southern PA should be sprayed for scab if at all possible. Weather conditions are conducive for infection in most regions of the state. If spraying at early flowering is not possible, a fungicide application up to 6 days later will provide some suppression of the disease. Keep an eye on your label to understand post-harvest interval restrictions.
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