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The oyster mushrooms in this video were not eaten as we don’t know the chemicals used to print this old phone book (old inks contain heavy metals).

This video demonstrates how oyster mushrooms grow on various substrates. This old phone book is made from recycled paper and sawdust.

Oyster mushrooms are saprophytic, meaning they feed on decaying organic matter like wood and other plant debris, made of cellulose, hemicellulose, and lignin. The mycelium, or vegetative part of the mushroom, secretes enzymes to decompose these substances, releasing nutrients it can absorb. A few parasitic oyster mushrooms eat bacteria and nematodes. Oyster mushrooms are used in mycoremediation and are known to remove contaminants in soil, water, and wastewater.

The phone book was pasteurized in boiling water, providing an area for the mycelium to grow and establish, producing fruiting bodies or mushrooms. Once the book cooled, we added the mushroom spawn (grains inoculated with mushroom mycelium) between layers of pages at a 25% ratio. After inoculation, we placed the book in an undisturbed area with temperatures between 70–75 F to allow colonization. The incubation period can range from 2 to 4 weeks, depending on the environment. I cut out two 3-inch holes from the lid to allow air circulation and covered them with micropore tape.

Blue Oyster mushrooms benefit from cold shock to stimulate fruiting. We placed the container in the refrigerator for a day. Afterward, I put it in a well-lit area from direct sunlight. The book was misted with water 4X daily. The whole process took approximately 4-½ weeks.

Ensure your working area and tools are clean and sanitized to prevent contamination. We sprayed and wiped the counter, container, lid, and tongs with 70% isopropyl alcohol and wore disposable gloves. Please do your research.

Thanks for watching, and I hope you enjoyed it!

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