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sooty blotch

noun, Plant Pathology
1.
a disease, especially of apples and pears, characterized by sootlike spots or blotches on the fruit, caused by a fungus, Gloeodes pomigena.
2.
a disease of clover, characterized by black, crusty blotches on the underside of the leaves, caused by a fungus, Cymadothea trifolii.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Historical Examples
  • To these should be added in the South and middle latitudes, sooty blotch and bitter rot.

    Apple Growing M. C. Burritt

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