The degree of acidity (pH)
Oyster mushroom mycelium grows optimally at a pH slightly acidic media, which is between 5.0 to 6.5. PH value of the medium is necessary for the production of white oyster mushroom metabolism, such as the production of organic acids.
Acidic conditions can cause impaired growth of oyster mushroom mycelium, grow contamination by other fungi, and even lead to death of oyster mushrooms. The pH is too high (alkaline), can cause metabolic system of white oyster mushroom are ineffective. In fact, the cause of death. Oyster mushroom fruit body grows optimally at pH near normal environment (pH 6.8 to 7.0).