CSA Xpert

Angular leaf spot also called as black arm or bacterial blight is one of the deadliest diseases of cotton. The disease causes following symptoms.

1. Symptoms of Bacterial Blight start as tiny water-soaked spots, and progress into characteristically angular shapes due to leaf veins limiting bacterial movement.

2. Lesions appear on the upper side of the leaf, turn black as they expand, and defoliation may occur.

3. Systemic infections follow the main veins as black streaks; symptoms on the bolls are characteristically sunken, water-soaked lesions.

4. The pathogen may also infects seeds and carried to next season.