Australia

Frogeye leaf spot

Cercospora sojina

Lesions of frogeye leaf spot are small, circular to somewhat irregular spots that develop on the upper leaf surfaces. Initially the spots are dark and water-soaked in appearance. As the lesions age, the center becomes light brown to light gray in color. Although lesions may merge to kill large areas of leaf tissue, the individual lesions do not increase significantly in size (~0.25 inch in diameter) Older lesions have a light center with a darker red to purple-brown border.