ABSTRACT There are many palm oil plants in Riau Province. The waste of palm oil empty fruit bunches (POEFB) produced can be composted and added by the biological agent Metarhizium anisopliae to control the Oryctes rhinoceros L pest. This study aims to obtain the best dosage of the liquid formulation of Metarhizium anisopliae Metsch. in metankos on mortality of Oryctes rhinoceros L. larvae in p…