Speckled blotch

Septoria avenae; Septoria tritici

Symptoms first appear as small spots on the lower leaves of seedlings. These spots grow into larger, lens-shaped lesions which are initially yellow and later turn reddish brown. They become grey or greyish-brown and speckled as tiny black fruiting bodies develop. Septoria causes more or less linear or rectangular lesions. There may be dark sporulating structures in the lesions. Note that with tan spot lesions are oval and tan.

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