Skin spot of potato

Skin spot is generally an invisible fungus until after approximately 2 months of storage, when the infected tissue begins to show spots. They tend to be bluish black and slightly raised. The mature fungal lesion is frequently sunken with a raised centre. Lesions may form either singly or in clumps and be distributed at random or aggregated around eyes, stolons and damaged skin. Infection can spread during storage.

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Presence among species

AgentsSusceptible host
PolyscytalumSolanum tuberosum