All contaminants

Black Pin Mold

Rhizopus/Mucor spp.

High

Starts white, becomes grey, then develops characteristic black-headed pins on tall aerial stalks (sporangia). Very fast growing. Common grain and straw contaminant.

Black Pin Mold — reference photo

Visual Identification

White initially, becoming grey, then developing distinctive black-headed pins on tall aerial stalks (sporangia) — looks like tiny black lollipops on sticks.

Not Treatable

Discard affected material immediately.

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