 Trichoderma harsianum is a species of fungi found in ginger plants. It produces two compounds, harsianic acid, A, and isoharsianic acid, B, which have been shown to be effective against certain bacteria and fungi. In particular, it was found to be effective against the corn pathogenic fungus usalagomedis, while be demonstrated antibacterial effects against staphylococcus aureus. Both compounds did not show any cytotoxicity against human cells. This article was authored by Harwoko Harwoko, Jungo Lee, Georgios Delitos, and others.