With the purpose of dto determiner the effect of the entomopatógenos Beauveria bassiana and Metarhizíum spp in the control of the population of the black weevil (Cosmopolitas sordidus Germar) and rrayado weevil (Metamasius hemipterus), the present test was made in a banana plantation variety "lnguiri" of 3 years of age located to 1 O km of the city of TARAPOTO by the nor1h of the highway Fernando Belaunde Terry (first stage) and in the Laboratory of phytopathologie of the Tropical lnstitute of Culture (second stage) during the month of November of the 2004. The treatments used as much at level of field and laboratory were Witness (To). Beauveria bassíane (T1). Metarhizium spp. (Tz), B, bassiana + Metarhizium spp. (T3) and Beauveria bassiana commercial (T.); being used 04 traps type sandwich of slice of pseudostem of 10 15 cm in length for the capture of weevils at level of field by bl...