The majority of PA is under high scab infection risk this week. This risk will persist as long as conditions remain damp. If your wheat will be flowering in the next several days, be prepared to target a fungicide application at early flower. If leaves dry sufficiently to allow for application but more rain is threatening, know that most of the scab products become rainfast very shortly after application (even within 15 min), and so you needn’t worry about rain washing your product off. If you have missed the early flowering timing, a fungicide may still be applied 5-7 days following the ideal target and still provide some scab protection. Be sure to observe label 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