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<p>Entomopathogenic fungi are commonly used as biological control agents. Recently, a strain of <i>Metarhizium robertsii</i> (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae) collected in France was identified as a good candidate for controlling invasive populations of the yellow-legged hornet, <i>Vespa velutina nigrithorax</i> (Buysson, 1905) (Hymenoptera: Vespidae) in Europe. Since <i>M. robertsii</i> is a generalist parasite, its usage as bioagent could be damaging for non-targeted species. Here we compared the lethal effects of three concentrations of this <i>M. robertsii</i> strain on <i>V. v. nigrithorax</i> and two non-target species commonly found in Europe, the common wasp <i>Vespula vulgaris</i> (Linnaeus, 1758) (Hymenoptera: Vespidae) and the buff-tailed bumblebee <i>Bombus terrestris</i> (Linnaeus, 1758) (Hymenoptera: Apidae). Exposure to <i>M. robertsii</i> spores altered the survival of all three species but at different degrees. Hornets had a consistently lower survival, even under low spore concentrations, when compared to wasps and bumblebees. The low susceptibility of the beneficial hymenopterans is encouraging in the perspectives of using <i>M. robertsii</i> as a biocontrol agent against invasive hornets.</p>

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The invasive hornet Vespa velutina nigrithorax is more susceptible to an entomopathogenic fungus than two other hymenopteran species, the wasp Vespula vulgaris and the bumblebee Bombus terrestris

  • 期刊论文

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  • 发表日期：

    2025年7月30日

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  • Mathilde Lacombrade,
  • Naïs Rocher,
  • Blandine Mahot-Castaing,
  • Fanny Vogelweith,
  • Mathieu Lihoreau,
  • Denis Thiéry

摘要

Entomopathogenic fungi are commonly used as biological control agents. Recently, a strain of Metarhizium robertsii (Metchnikoff) Sorokin (Hypocreales: Clavicipitaceae) collected in France was identified as a good candidate for controlling invasive populations of the yellow-legged hornet, Vespa velutina nigrithorax (Buysson, 1905) (Hymenoptera: Vespidae) in Europe. Since M. robertsii is a generalist parasite, its usage as bioagent could be damaging for non-targeted species. Here we compared the lethal effects of three concentrations of this M. robertsii strain on V. v. nigrithorax and two non-target species commonly found in Europe, the common wasp Vespula vulgaris (Linnaeus, 1758) (Hymenoptera: Vespidae) and the buff-tailed bumblebee Bombus terrestris (Linnaeus, 1758) (Hymenoptera: Apidae). Exposure to M. robertsii spores altered the survival of all three species but at different degrees. Hornets had a consistently lower survival, even under low spore concentrations, when compared to wasps and bumblebees. The low susceptibility of the beneficial hymenopterans is encouraging in the perspectives of using M. robertsii as a biocontrol agent against invasive hornets.