Laboratory bioassays to test the persistence of formulated fungal spores. The average percentage corrected mortality (±S.E.) of An. stephensi larvae (n = 3) exposed to unformulated, WaterSavr-formulated and ShellSol T-formulated Metarhizium anisopliae (Ma) and Beauveria bassiana (Bb) spores, immediately (Day 0) or seven days (Day 7) after application. Letters in common (upper case for Ma and lower case for Bb) show no significant difference (LSD post hoc test, α = 0.05).