Oil palm (Elaeis guineensis Jacq.) is an industrial crop widely used worldwide, however, it is affected by the attack of pest insects that represent a limiting factor for the their large-scale production, in this sense, entomopathogenic fungi are important biological pest control agents, as they can infect the insect at different stages of development. Therefore, environmentally viable and low-cost alternatives are important for the production of these fungi. Thus, the present work aims to evaluate the development of the fungus Beauveria sp. (BP05) in oil palm residues, as well as to determine the highest production of the fungus, through the analysis of the activity, concentration and viability of the developed conidia. To evaluate the development of the fungus, Parboiled Rice-AP; TDM-wet palm pie; TDL-washed palm pie; Washed palm kernel cake-TPL and wet palm kernel cake-TPM, where the activity, concentration and viability of the fungus conidia were evaluated. Treatments T3 (TDM 30% + TPM 30% + AP 40%) and T5 (TDM 25% + TPM 25% + AP 50%) were more productive for the development of the fungus. These results may contribute to a greater production of reproductive structures of Beauveria sp. (BP05) and the reuse of oil palm residues, reducing their environmental impacts, and the costs of large-scale production of entomopathogenic fungi.