Banded leaf and sheath blight

Symptom

Disease appears at pre-flowering stage in 40-50 days old plants but can also occur on younger plants. Symptoms develop on leaves, sheaths and stalks and can later spread to ears. On leaves and sheaths, a number of soaked, 
discolored concentric bands and rings are visible, often brown, tan or gray in color. Symptoms appear initially on the first and second leaf sheath above ground. Developing cob is completely demaged and dried prematurely with cracking of husk leaves. if seedlngs are affected, whole plant could be blighted within a week.