Moisture and Mycelial Appearance

Moisture within the casing layer has a direct effect on the diameter and degree of branching in growing mycelium. These characteristics are indicators of moisture content and can be used as a guide to proper watering. 

Overlay Is a dense mycelial growth that covers the casing surface and shows little or no inclination to form pinheads. Overlay directly results from a dry casing, high levels of CO2 and/or low humidity. (See Chapter IX on pinhead initiation). 

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