• Attacks leaves, twigs and fruits of mandarin.
• Sour orange, lemon, mandarin, tangelos extremely susceptible Grapefruit, sweet oranges and acid lime highly resistant. Severe in rainy seasons.
• On the leaves the disease starts as small pale orange coloured spots.
• The leaf tissue is distorted to firm hollow conical growths with the lesion at the apex.
• The crest of these growth becomes covered with scabby corky tissue colour at first but later becomes dark olive with age.
• Lesions most common on undersurface of leaf. They penetrate leaf and are later visible on both sides.
• nfected areas run together and cover large area.Leaves wrinkled, distorted and stunted.
• On twigs similar lesions are produced.
• They form corky outgrowths.On fruits irregular scably spots or caked masses produced.
• Cream colour in young fruits; dark olive grey in old fruits.
• Fruits attacked when young become misshapen with prominent warty projections. They drop prematurely.

Management

• Spray Carbendazim 0.1%