Mortality of the crapemyrtle bark scale (Hemiptera: Eriococcidae) by commercial biopesticides under greenhouse and field conditions

•Trials demonstrate that CMBS is susceptible to several fungal biopesticides.•CMBS is more affected by Beauveria bassiana strains than Isaria fumosorosea PFR97.•Biopesticide applications in autumn and winter resulted in higher scale mortality than spring treatments.•Spore germination of all fungal strains was greatest at 28 °C.