Damage Symptoms

Leaf lesions are circular, about 1-cm in diameter, with brown borders and light gray centers (frog eye). Severe infection can cause leaf drop, with or without leaf yellowing.

Lesions on stems, petioles, and fruit stems are elliptical with dark borders and gray centers. The fruit do not become infected.

Conditions for Development

The fungus survives on seed and in infected crop debris. Extended rainy periods, long periods of leaf wetness, and close plant spacing enhance disease development.

Control

Fungicidal sprays can control the disease, but they are usually not necessary unless during conditions highly favorable to the disease.