Evaluation of the cellulose-degrading capabilities of Laetisaria arvalis. Growth was performed in minimal medium containing filter paper strips as the sole carbon source. Pictures were taken after one day (A), five days (B) and 10 days (C). Left tube: control without inoculum; middle tube: L. arvalis; right tube: Trichoderma reesei QM6a. These results are representative of several independent experiments.