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Causal organism - Alternaria and Cladosporium species
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The fungi which can cause sooty moulds are very common in the atmosphere and can survive adverse conditions as spores or as mycelium on a wide range of materials. They do not require living host material to survive.
Importance
The discolouration of ears and grain rarely have any effect on grain yield but the mixing of spores with the grain at harvest can lead to discoloration of the grain which can affect its marketability, particularly if the grain is planned for milling for flour production.
