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
