Manganese (Mn) deficiency symptoms

Manganese (Mn) deficiency symptoms.

• Plants exhibit “comb-tooth” leaf chlorosis and the presence of fungus- Deightoniella torulosa in the chlorotic areas.

• The chlorosis starts from the leaf margins and spreads along the veins towards the midrib with interveinal areas remaining green, hence the comb-tooth appearance.

• Leaves desiccate prematurely causing poor fruit development.

• Normal size bunch is produced by the plant but the fruits are covered with black spots.

Control Measures:

a.      Spray Manganese sulphate @ 2 g/l of water ( Neutralized with lime)once a week for two weeks.

Photos courtasy: TNAU, Coimbatore, Tamilnadu, India.

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