C/O: Setosphaeria turcica (anamorph: Exserohilum turcicum)

Symptoms:

• Early symptoms appear as long, narrow, tan lesions that form parallel to leaf margins (Fig1).
• As these lesions develop, the classic symptoms of NCLB will be observed: long, oblong, or “cigarshaped” tan or grayish lesions (Fig2).
• The lesions produce olive-green or black fungal spores when humidity is high, which can give the lesions a dark or dirty appearance.
• Generally, disease is more severe after tasseling due to the nutritional variation in crop stages