In the early stages, a large angular spot of light yellow color appears on the upper surface of the leaves. In the later stages of the disease, these spots spread rapidly, causing the leaves to turn brown. The under surface of infected leaves appears to be water-soaked. For its control, Amistar, 15-20 ml. or Entracal, 15-20 g. Spray it by mixing it per 15 liters of water.