The Asian hornet (Vespa velutina) is a keen predator of honeybees and other insects. Its success as invasive species threatens the stability of ecosystem services provided by them, such as pollination of wild plants and crops. In this study we analyse their impact as hunters of flower visitors on plant pollination, by studying the hunting behaviour of V. velutina in flower surroundings, the effect of V. velutina hunting on the floral visiting behaviour by insects and its impact on the amount of conspecific pollen deposited on the stigmas of Mentha suaveolens, a native and common herb to southern and western Europe. We made observations and video-recordings in blooming patches with and without the presence of V. velutina and quantified the deposition of conspecific pollen on stigmas in those same patches. Asian hornets were frequent and successful hunters of flower visitors of Mentha suaveolens, inducing changes in the foraging behaviour of several groups of pollinators. The patch visitation rate of European honeybees (Apis mellifera), the flower visitation rate of small hymenopterans and the flower visitation time of bumblebees (Bombus sp.) and syrphids was significantly reduced in patches with presence of the predator. As a consequence, the quantity of conspecific pollen on stigmas of the studied native plant decreased in patches with V. velutina. In this study we demonstrate the negative impact of the invasive hornet V. velutina on pollination services in invaded areas as a consequence of their hunting of pollinators in flower patches.

大黄蜂（Vespa velutina）是蜜蜂和其他昆虫的敏锐捕食者。它作为入侵物种的成功威胁到它们所提供的生态系统服务的稳定性，例如野生植物和农作物的授粉。在这项研究中，我们通过研究V. velutina在花卉环境中的狩猎行为，V。velutina狩猎对昆虫的花访行为的影响及其对植物授粉行为的影响，分析了它们作为访花者对植物授粉的影响。特定的花粉沉积在欧洲南部和西欧的本地和常见药草薄荷（Menta suaveolens）的柱头上。在有和没有V. velutina的情况下，我们都在盛开的小块上进行了观察和视频记录并量化了相同花粉在柱头上的同种花粉的沉积。亚洲大黄蜂经常成功地捕食南方薄荷（Mentha suaveolens）的花朵访客，从而导致几组授粉媒介觅食行为发生变化。在有捕食者存在的斑块中，欧洲蜜蜂（Apis mellifera）的斑块访问率，小膜翅目昆虫的花访率和大黄蜂（Bombus sp。因此，同种花粉对所研究的原生植物的柱头数量与补丁下降五绒毛。在这项研究中，我们证明了侵入性大黄蜂V. velutina的负面影响 入侵地区的授粉服务，因为他们在花丛中寻找传粉媒介。