Light intensity of more than 500 lux during the spawn run may result in premature formation of primordia. ![]() Temperatures for spawn run are maintained at about 25C +or- 2C for about 28 to 30 days. After the mycelium is allowed to colonize the substrate (spawn run). The spawn then is mixed into the substrate either mechanically or by hand. For direct use of substrate, a mixture of cottonseed hulls (93%), wheat bran (5%), sucrose (1%), and calcium carbonate (1%) is moistened to about 60% moisture and then filled into polypropylene bags.Īfter the substrate has cooled, it is inoculated with either grain or sawdust spawn. The pile then is covered with plastic and turned (remixed) twice at two-day intervals. Composted substrate is prepared by mixing and watering ingredients in a large pile. In either case, the mixed substrate (about 2.5 kg wet wt) is filled into heat resistant polypropylene bags and sterilized (substrate temperature 121C) for 60 min. For cultivation on natural logs, members of the oak family (Fagaceae) are preferred, but many other species of both hard and softwoods may be used.įor synthetic medium production of Auricularias, the substrate may be composted for up to 5 days or used directly after mixing. polytricha commonly are produced on a synthetic medium consisting of sawdust, cottonseed hulls, bran and other cereal grains or on natural logs of broad-leaf trees (Quimio 1982, Chang and Quimio 1982, Oei 1996). ![]() production now represents about 7.9% of the total cultivated mushroom supply world-wide.Īuricularia auricula and A. This value is an increase of 85,000t or 18% over 1990 levels (Chang 1999). Commonly known as wood ear, Auricularia auricula is the first recorded cultivated mushroom (Chang 1993).
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