Which plant pathogen causes southern leaf blight disease in maize?

✏️Symptoms:
-​The fungus affects the crop at a young stage. Small yellowish round to oval spots is seen on the leaves.
-The spots gradually increase in the area into bigger elliptical spots and are straw to grayish brown in the center with dark brown margins.
-The spots coalesce giving a blighted appearance.
-The surface is covered with olive-green velvety masses of conidia and conidiophores.