brown spot

brown spot
noun
: any of various diseases of plants producing brown discolorations on the leaves; specifically : a destructive disease of Indian corn caused by a fungus (Physoderma zeae-maydis) affecting the leaves and stalks — called also Physoderma disease

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Plant Pathol.
a disease of many plants, characterized by irregular, brownish lesions on the fruit and foliage and by stem cankers, caused by any of several fungi, as Ceratophorum setosum or Cephalosporium apii.

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brown spot,
a fungous disease of lawns, in which the leaves and stems of plants develop brownish discolorations, especially under hot and humid conditions.

Useful english dictionary. 2012.

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