The most detrimental plant pest organism to oil palm plantations is the fungus Ganoderma boninense which causes basal stem rot disease (BSR). Until now, the control of BSR has not been successful due to the nature of Ganoderma sp. which is a soil-borne pathogen and persists in the soil for a long time. It is suspected that herbal plants such as Bogor taro can suppress BSR disease. This study ai…