Biological and behavioral parameters of the parasitoid Cotesia flavipes (Hymenoptera: Braconidae) are altered by the pathogen Nosema sp. (Microsporidia: Nosematidae)

► Cotesia flavipes is used in >3 million ha/year against the sugarcane borer in Brazil. ► The effects of the pathogen Nosema sp. was assessed on C. flavipes. ► Heavily infected sugarcane borer larvae did not support parasitism. ► Life cycle was altered in parasitoids developing in infected sugarcane borers. ► Nosema sp. reduced the ability of the parasitoid to select and locate hosts.