Identification symptoms

1. long elliptical grayish green or tan lesions on leaves 2.5 to 25 cm in length and 4 cm in width.

2. Lesions first appear as slightly oval, water soaked, small spots on lower leaves and increase in size and number

3. Progress upwards until a complete burning of the foliage. Under high humidity the whole leaf area becomes necrotic and plants appear as dead.

4. Spores produced on the under surface are arranged in concentric zones resembling a target like pattern.