Fact Sheets

General Information

Mushroom information on growing mushrooms, specialty mushrooms, wild mushrooms, Spawn suppliers, and Common terminology.
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Glossary of Commonly Used Terms for Mushroom Farming

The purpose of this fact sheet is to provide basic information on the process of seeding substrate and the management of the vegetative stage of growing the commercial mushroom, Agaricus bisporus. The process before this stage, substrate preparation and the processes after, casing and production, are discussed in other publications.


This informational document is designed to be a constructive review of Verticillium Dry Bubble, the most common fungal disease of the commercial mushroom Agaricus bisporus.

Este documento informativo ha sido diseñado para servir como una revisión constructiva de la Burbuja Seca causada por Verticillium, la enfermedad de origen fúngico más común de la seta comercial Agaricus bisporus.

Green mold is characterized by dense white mycelial growth followed by extensive green sporulation of the fungus.

Bacterial blotch may be endemic on mushroom farms, damaging mushroom quality and posing a potential yield loss. Presence of the disease is probable if the surfaces of the mushrooms do not dry following watering, irrespective of the season.


Sciarid flies, Lycoriella 7nali, have been the most devastating insect in the Pennsylvania mushroom industry, at least since September of 1979.

Phorid flies, Megasellia halterata (Above), in general may be more numerous than sciarids, but phorid flies cause less mushroom damage than sciarid flies. However, the total economic effect of phorid feeding on mycelium is not really known.

Parasitic and saprophytic species of nematodes associated with commercial mushroom growing are routine inhabitants of most agricultural soils.