onion smudge

variants: or

onion scab

Definition of onion smudge

  1. 1 :  a common fungus disease of the onion characterized by black concentric internal rings or smutty spots on the surface of the bulb scales

  2. 2 :  the fungus (Colletotrichum circinans) that causes onion smudge

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a rounded knoll or a ridge of ice

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