Late-blight meaning

A highly destructive disease of solanaceous plants, especially potatoes and tomatoes, caused by the oomycete Phytophthora infestans, appearing in wet weather often late in the growing season, and characterized by decay of the foliage and tubers or fruits.
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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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