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White Plaster Mold
The white plaster mold of mushroom compost, known to growers as "Scopulariopsis fimicola". It forms thick, fluffy white spots on compost or casing whose centers turn powdery, like flecks of plaster or flour, and it competes with mushroom mycelium for nutrients. It signals greasy, over-wet or alkaline compost and cannot be controlled once it appears.
Not edible; a crop competitor. No toxicity documented for this species.
Never eat a wild mushroom based on a web page — confirm with an expert.
Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
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