oak wilt

noun Plant Pathology.
a disease of oaks, characterized by wilting and discoloration of the leaves and defoliation, usually starting at and spreading from the top of the tree and the ends of the branches, caused by a fungus, Chalara quercina.

Origin:
1940–45, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Pruning trees in winter can help reduce the spread of oak wilt.
The potential of trench inserts for oak wilt suppression.
Once oak wilt establishes itself in an area, control of the disease is both
  difficult and costly.
Once oak wilt exists in an area, control of the disease is costly.
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