Source: University of Illinois
Goss's wilt was detected in a corn leaf sample last week at the University of Illinois Plant Clinic. Although Goss's wilt has been observed in Illinois in past years, it is not typical, said U of I Extension plant pathologist Carl Bradley.
Goss's wilt, caused by the bacterium Clavibacter michiganense subspecies nebraskensis, is commonly found after hail storms, high winds and heavy rainfall. Symptoms of this disease appear as large tan to gray lesions on the leaves with dark spots, often referred to as "freckles," within the lesions.
"Some plants may wilt, as the pathogen can infect the xylem," Bradley said. "In some cases, darkening of the vascular tissue can be observed in affected plants if a cross-section is cut through the stalk."