The effect of lufenuron on the germination, growth and entomopathogenic_x000D_ activity of Lecanicillium lecanii was determined and that no significant difference_x000D_ on growth under laboratory conditions. For which we worked with three_x000D_ concentrations of lufenuron (30 ppm, 37.5 ppm, 50 ppm). The germination_x000D_ percentage was determined by adding 2 mL of each dilution (double_x000D_ concentrate) of the chemical to tubes containing 2 mL of standardized spore_x000D_ suspension of L. lecanii, thus obtaining a final solution of 1x105 spores / mL,_x000D_ incubating at 25 ° C for 18 to 24 hours. Then the germinated and non-germinated_x000D_ spore count was performed. The mycelial growth of L. lecanii was evaluated by_x000D_ seeding by puncture in the central area in Petri dishes containing Papa Dextrose_x000D_ Agar with the different concentrations of both Lufenuron, these were i...