FHB Update from MD, 05/20/19

Wheat in the North-western counties (Frederick, Howard, Carroll, Harford counties) of the state is flowering currently. The FHB risk across the state continues to be high, so if your wheat is flowering, it’s recommended to spray fungicides for managing FHB. The best stage for spraying fungicides is early flowering or within 4-5 days of that. The fungicides effective for FHB are Prosaro/ Caramba/ Miravis-Ace. All of these fungicides are pre-mixed and do not need to be tank mixed with any other product for spraying. Read the label carefully for recommended rates and harvest restriction times. Strobilurin containing fungicides should not be sprayed at this stage. Aerial application at a rate of 5 gallons per acre or ground application at 15 gallons per acre with 300-350 um droplet size is recommended. Spray nozzles should be angled at 30°-45° down from horizontal, toward the grain heads, using forward- and backward mounted nozzles or nozzles with a two directional spray, such as Twinjet nozzles. Wheat in the Eastern shore is already past the stage for both FHB infection and fungicide spray.

--Nidhi Rawat, Small grains Pathologist, University of Maryland

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