FHB Update from NC, 04/22/19

Wheat flowering today is at medium to high scab risk in scattered but widespread areas of the central NC Tidewater zone. Late-planted fields may not be near flowering yet, but those planted on time may be. Apply fungicide at early flowering if risk is high then. If necessary, spraying up to 6-7 days after early flowering should be nearly as effective. Fungicides are significantly less effective against scab when applied prior to flowering. Do not apply a strobilurin-containing fungicide after flag leaf stage. The most effective products for scab 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.

--Christina Cowger, Plant Pathologist, USDA-ARS and North Carolina State University

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