Diseases of Fruit Plantation Medicinal and Aromatic Crops

Bacterial leaf spot

Causal Organism : Pseudomonas viticola Patel et al.
The spots on the leaves are dark brown . Sometimes they coalesce to form larger spots.

• Vein infection is also common. Petioles and stems show elongated cankers.
• The infected leaves after drying are firmly attached to the stem. These leaves crumpled very easily.
• The bacterium is non- capsulated, gram negative and lophotrichous.
• Old, dry leaves attached to the grapevines and the stem cankers act as primary sources of inoculum.
• The bacterium infects neem and Phyllanthus maderaspatensis.
• Rain water disseminates the bacterium. The disease is severe during rainy season.