late-blight

late blight

noun Plant Pathology.
a disease of plants, especially potatoes, celery, etc., characterized by spotting, blighting, and withering or decay of the entire plant, caused by any of several fungi, as Phytophthora infestans or Septoria apii.

Origin:
1900–05

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
late blight   (lāt)  Pronunciation Key 
A disease of potato plants caused by the oomycete organism Phytophthora infestans and characterized by decay of the foliage and tubers. An outbreak of late blight led to widespread famine in Ireland in 1845-1850.
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