fire blight

☆ a disease of fruit trees, as the pear or apple, caused by a bacterium (Erwinia amylovora): it kills the branches and blackens the leaves

See fire blight in American Heritage Dictionary 4

also fire·blight

noun

A destructive disease of apple and pear trees, caused by a bacterium (Erwinia amylovora) that blackens the leaves and kills the branches.

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