Pockets of medium to high scab risk for wheat flowering this week have opened up in southeast NC, specifically Onslow, Pender, and adjacent counties. Late-planted fields are likely not near flowering yet, but those planted on time may be. Fungicides are significantly less effective when applied prior to flowering. Apply fungicide at early flowering. If necessary, up to 7 days later should be almost as effective. Do not apply a strobilurin-containing fungicide after flag leaf stage. The most effective products are Caramba, Prosaro, Miravis Ace, and Proline. Aerial application may be profitable. For ground application, rear- and forward-facing nozzles should be angled down 30 degrees from horizontal.
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