Wasp eggs laid on paralysed insects emit gas that keeps victims fresh

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    Wasp eggs laid on paralysed insects emit gas that keeps victims fresh
    Killer wasp

    The beewolf wasp paralyses its victims with venom

    Dietmar Nill/naturepl.com

    By Chris Baraniuk

    A bee-killing wasp lays eggs that emit toxic gas – a food hygiene technique that keeps the larvae’s dinner fresh until they hatch.

    The European beewolf’s eggs spew out large amounts of nitric oxide (NO), which reacts with oxygen in the air to form nitrogen dioxide (NO2). The gases destroy microbes such as fungi that threaten food resources for the offspring.

    The beewolf paralyses its prey by stinging them with venom. It then lays eggs on the paralysed bodies of the bees, which …

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