Virulence of commercial strains of Beauveria bassiana and Metarhizium brunneum (Ascomycota: Hypocreales) against adult Xylosandrus germanus (Coleoptera: Curculionidae) and impact on brood

► Three mycoinsecticides were tested against ambrosia beetle Xylosandrus germanus. ► Beauveria bassiana Naturalis and Metarhizium brunneum F52 were more virulent than B. bassiana GHA against adult females. ► Spraying did not affect initial tunneling activity, but resulted in reduced numbers forming galleries and producing brood. ► Broods from treated females were smaller in size, and some had up to 100% of the progeny infected.