Vespa velutina is an invasive hornet that is colonising several countries worldwide, with detrimental effects on multiple components but primarily affecting honey bees and native insect species. Traps for wasps and hornets are commonly used for trapping V. velutina, both for monitoring and control purposes. In this study, we compared the performances of two typologies of traps and baits widely used for trapping this invasive hornet, by evaluating their effectiveness and selectiveness in trapping V. velutina in two sites during two different periods of the year, spring and autumn. The performance of the traps changed in relation to (i) the trap’s model, (ii) the bait’s typology and (iii) the period of the year. In spring, traps with common beer as bait were more effective and more selective independently of trap’s model than the commercial bait that has been tested. On the contrary, in autumn, just one combination of trap and attractant (the commercial trap and bait) achieved higher effectiveness and selectiveness. Despite the underlined variations among traps and baits, overall catches of V. velutina were scanty compared to bycatches of non-target insects, since best performing traps either in term of effectiveness and selectiveness caught 3.65% of the target species in spring and 1.35% in autumn upon the total trapped insects. This highlights the urgent necessity of developing more selective trapping methods for monitoring and particularly for controlling purposes.

中文翻译：

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诱饵和诱饵对入侵大黄蜂黄蜂大黄蜂的有效性和选择性

Vespa velutina是一种侵入性大黄蜂，在全球多个国家定居，对多种成分具有有害影响，但主要影响蜜蜂和本地昆虫物种。黄蜂和大黄蜂的诱集装置通常用于诱捕V. velutina，用于监视和控制目的。在这项研究中，我们通过评估诱捕V. velutina的有效性和选择性，比较了两种广泛用于诱捕这种侵入性大黄蜂的诱捕器和诱饵的性能。在一年中的两个不同时期（春季和秋季）在两个地点分布。诱捕器的性能相对于（i）诱捕器的模型，（ii）诱饵的类型和（iii）一年中的时段而发生了变化。在春季，以啤酒为诱饵的诱捕器比经过测试的商业诱饵更有效且更具选择性，而与诱捕器的模型无关。相反，在秋天，诱捕剂和引诱剂的一种组合（商业诱捕剂和诱饵）实现了更高的有效性和选择性。尽管诱捕器和诱饵之间有下划线的差异，但V. velutina的总体捕获量与非目标昆虫的兼捕相比，它们的数量很少，因为在有效性和选择性方面表现最佳的陷阱在春季被捕获的昆虫占总被捕昆虫的3.65％，在秋季捕获了1.35％。这突出表明迫切需要开发更多的选择性诱捕方法来进行监视，尤其是用于控制目的。