North Carolina Wheat Disease Update 4/25/17

— Written By

Wheat crops that are flowering now in northern NC may be at significant risk of scab, especially if the variety is susceptible or moderately susceptible. This includes Dare County, and north of the Albemarle Sound (Perquimans, Pasquotank, Camden), as well as in the northern Piedmont (Surry, Stokes, Yadkin, Forsyth). Apply fungicide at early flowering or up to 7 days later. Do not apply a strobilurin-containing fungicide. The most effective products are Caramba, Prosaro, and Proline. Aerial application may be profitable. For ground application, rear- and forward-facing nozzles should be angled down 30 degrees from horizontal. Average reported crop maturity: 80-90% of the crop in the Washington-Tyrrell-Beaufort-Hyde region is late in the flowering process, and should be mostly past vulnerability. North of the Albemarle: 50-60% of the crop is in the heading/flowering process, and is at greater risk, especially if the wheat variety is susceptible.

Information on variety resistance is at https://smallgrains.ces.ncsu.edu/smallgrains-disease-identification-management/ and on ground and aerial fungicide application at https://smallgrains.ces.ncsu.edu/smallgrains-head-scab/.

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