blue mold

noun
1.
Also called green mold. any fungus of the genus Penicillium, which forms a bluish-green, furry coating on foodstuffs inoculated by its spores.
2.
Plant Pathology.
a.
a disease of plants, characterized by necrosis of leaves or fruit and the growth of bluish or grayish mold on affected parts, caused by any of several fungi, as of the genus Penicillium or Peronospora tabacina.
b.
downy mildew ( def 2 ).

Origin:
1655–65

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Control of blue mold decay of apple during commercial controlled atmosphere
  storage with yeast antagonists and sodium bicarbonate.
In contrast, the sporulation of blue mold-infected lemons was greatly reduced
  by a day-night ozone cycle.
Control of blue mold of apple by combining controlled atmosphere, antagonist
  mixtures and sodium bicarbonate.
Yeasts are tiny fungus plants related to bacteria, and to molds such as the
  blue mold which grows on bread.
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