Diseases of Fruit Plantation Medicinal and Aromatic Crops

Yellow leaf spot disease

Causal organism: Curvularia sp., Colletotrichum sp., Phyllosticta sp., Helminthosporum sp.and Alternaria tenuis have been reported to cause leaf spot of seedlings.

Symptoms

• Yellow specks measuring 3-10mm diameter appear on the leaves.
• These spots coalesce to form larger lesions surrounded by yellow haloes.
• Infected seedlings are stunted and in severe cases they die.

Epidemiology

• The disease is severe during summer months (Feb-Mar) and continues to infect seedlings until the onset of rains.
• Seedlings (1- 2.5year old) exposed to the sun are susceptible.