ABSTRACT This study aims to select the endophytic fungi of acacia plants which have the best antagonistic potential as biological agents against fungi Ceratocystis sp.. The study was conducted at the Laboratory of Plant Protection Departement PT. Arara Abadi, Desa Pinang Sebatang, Kecamatan Tualang, Kabupaten Siak, Riau. The study was conducted for six months from March 2019 to August 2019…