Description: Lesions of NCLB are small (1/8?1/2" long), oval, and tan to brown in color with dark brown borders. The lesions are usually aligned with the veins of the leaf and occur in linear groups.

Location: NCLB is most prevalent in the northern third of Ohio counties, but can occur throughout the state in years with cooler weather. The disease is most prevalent on inbreds in seed production fields and some of the more susceptible hybrids. The disease is generally associated with continuous corn especially in reduced tillage.

Time of attack: Lesions are detected after tasseling to crop maturity.

Management:
· Resistant hybrids
· Crop rotation
· Till residues