This matrix was produced from cajuí sawdust, with humidification of 75%. The pH was corrected to approximately 6.5, by adding CaCO3. Then that substrate was deposited on glass bottles of 500 mL, in 200 g
portions, which were autoclaved at 121 °C for 45 minutes. After cooling, the substrate was inoculated with the secondary matrix. The bottleswere partially closed, and kept in special chamber with biochemical oxygen demand (BOD) at 25 ± 2 °C until the complete
colonization of the substrate by fungus. This matrix served as a source of inoculation for the cultivation substrates for the production of L. strigosus mushrooms