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blight

The Columbia Encyclopedia, Sixth Edition

blight general term for any sudden and severe plant disease or for the agent that causes it. The term is now applied chiefly to diseases caused by bacteria (e.g., bean blights and fire blight of fruit trees), viruses (e.g., soybean bud blight), fungi (e.g., chestnut blight), and protists (e.g., potato blight). Other plant afflictions (caused by insects or unfavorable climatic conditions) that display similar symptoms are also called blights. See diseases of plants .


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The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press

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Related entries from encyclopedias, dictionaries, and thesauruses

Potato Blight
Potato Blight Potato blight (or potato late blight) is caused by a mildewlike fungus called Phytophthora infestans that can infect the potato foliage and its tubers. Although P. infestans is best known as a pathogen of the potato, this fungus also... Read more
Chestnut Blight
Chestnut Blight The American chestnut ( Castanea dentata...wildlife, livestock, and people. The chestnut blight fungus ( Cryphonectria parasitica ) was...imported Japanese chestnut seedlings. The blight fungus swept through the chestnut forests... Read more
potato blight
potato blight A term that may refer to either late blight or early blight. Early blight is much the less serious of the two diseases and is caused by the fungus Alternaria solani ; dark, concentrically zoned spots appear on the leaves of infected... Read more
potato blight
potato blight A term that may refer to either late blight or early blight. Early blight is much the less serious of the two diseases and is caused by the fungus Alternaria solani; dark, concentrically zoned spots appear on the leaves of infected... Read more
blight
blight / blīt / • n. a plant disease, esp. one caused...fungi such as mildews, rusts, and smuts: the vines suffered blight and disease. ∎  inf. anything that causes a...that spoils or damages something: her remorse could be a blight on that happiness. ∎  an ugly, ... Read more

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