Diseases of Fruit Plantation Medicinal and Aromatic Crops

Brown blight of leaf

This disease is generally seen on leaves during the hot weather. Injury caused by sun scalding or other type of wounds on leaves predispose them for infection by Colletotricum gloeosporioides.
Symptoms

• Round necrotic spots measuring up to 25 mm in diameter appear on leaves.
• Two or more such spots may coalesce & the entire or a portion of leaf may look blighted.
• Necrotic spots are brown in colour hence the name brown blight.
• Fructifications of the fungus appear as black dots on the spots on upper or lower surface of leaf.

Management

1. Maintain proper overhead shades to avoid sun scalding of leaves.
2. Spraying 0.5% Bordeaux mixture to protect leaves from the rust fungus appears to give adequate protection against brown blight also.