Diseases of Fruit Plantation Medicinal and Aromatic Crops

Bacterial leaf spot

Causal organism: Xanthomonas syringae pv.pruni vauterin.
SYMPTOMS

• It is most commonly observed in nursery stages.
• The disease appears on leaf surface as angular dark brown spots of 0.5to 3.0 mm diameter.
• The lesions are bordered by light, yellowish green halo.
• In severe condition, leaves turn yellow and drop.
PSI: Infected plant part
SSI: Air borne bacterial cells.

Life cycle

Management

• Cut and burn the infected plant parts.
• Aerial spray of streptocycline (0.5 g/liter).