Oil palm (Elaeis guineensis Jacq.) is a tropical plant native to Nigeria in West Africa. In the development of the fast-growing oil palm industry in Indonesia, a major challenge arises related to stem base rot disease (BPB) caused by the fungus Ganoderma boninense. Curcumin has strong antifungal ability and can damage cell membranes and alter proteins in pathogenic fungi. Tannins have potential…