Characterization of entomopathogenic nematodes and symbiotic bacteria active against Spodoptera frugiperda (Lepidoptera: Noctuidae) and contribution of bacterial urease to the insecticidal effect

► Soil nematodes from the South of Brazil were screened for pathogenicity against S. frugiperda. ► Symbiotic bacteria associated to these nematodes were isolated and characterized. ► Urease production by symbiotic bacteria along infection in S. frugiperda was evaluated. ► A positive correlation was found between bacterial urease production and entomopathogenicity.