Why Is My Corn Black

After prolonged irritation, a brown, red, or black discoloration may develop under a large corn or callus. This is caused by a small amount of bleeding in the space between thick and normal skin. In severe cases, the thick and normal skin may separate, exposing the area to possible infection.

What color corns are there?

Turns out corn comes in far more colors than I ever imagined. You can also find it in calico (or speckled corn), magenta, red, scarlet, pink, yellow, orange, bright blue, dark blue, light blue, black, purple, maroon, brown, white, and even cream.

What is the black stuff on corn on the cob?

Based on prior years with wet fall corn, the most common mold generally observed is Cladosporium. This fungus causes a dark green to black mold growth frequently seen on the kernel surface, between kernels or into the cob.