UV-B radiation-related effects on conidial inactivation and virulence against Ceratitis capitata (Wiedemann) (Diptera; Tephritidae) of phylloplane and soil Metarhizium sp. strains.

•Phylloplane isolates does not show better UV-B radiation tolerance those from the soil.•The UV-B exposure time is the limiting factor in determining virulence loss.•The exposure time needed for a 50% reduction in fly mortality was 47.2h.•The exposure time needed for a 50% reduction in conidial viability was 5.6h.•High UV-B exposure related conidial inactivation rates do not result in virulence loss.