Duku (Lansium domesticum) is a typical tropical plant. This plant has a wide distribution in Southeast Asia. Duku (L. domesticum) is a type of fruit from the Meliaceae family. The pathogen Ceratocystis sp. plays a negative role in duku plants, which can damage, threaten, and cause several lethal symptoms on plants. Ceratocystis sp. causes extensive disease symptoms such as stem canker and root …