Courtesy Pacific Northwest Pest Alert Network
Fusarium Head Blight appeared recently in winter wheat and spring wheat fields in south central and southeast Idaho, the Pacific Northwest Pest Alert Network reported July 11.
Juliet Marshall, plant pathologist at the University of Research and Extension Center in Idaho Falls, said in the alert that FHB appeared from Glenns Ferry east to Firth. Some winter wheat fields have all-white or partially white heads due to FHB.
The fungus-caused FHB, also known as head scab, can reduce yield as well as the quality of small grains for processing. Rainfall or high humidity, during or soon after flowering, can increase FHB risk.
“While it is unlikely that there are any fields still in the vulnerable stages (flowering), at-risk fields should be protected with appropriate fungicide application,” Marshall said in the alert.
She recommended growers scout fields and identify infected areas before harvest. At harvest, infected seeds and tombstone kernels can be reduced by increasing the fan speed on a combine harvester, she said.