To be effective, management strategies of invasive alien species cannot ignore their spatiotemporal behavior particularly those exerting serious damages to human activities. The black planthopper Ricania speculum is an Asian insect that has been reported as an alien invasive species in Italy, where it threatens local plant diversity, including important crops. In our work, we analyzed the activity rhythms of this species through circular statistics and the efficiency of chromotropic traps to capture adult individuals. Captures were carried out in central Italy, where the black planthopper is showing a remarkable range expansion, after its first discovery in 2009. We observed that the species was mainly crepuscular, with a high intersexual activity overlap. Activity rhythms changed between July–August and September–October, with changing heliophany, but peaked at sunset and were the lowest in the second half of the night and early morning. The insects were mostly caught by green traps, particularly in September, which is the period of egg-laying inside the leaves; conversely, orange ones were avoided, and yellow ones captured proportionally to their local availability. Strategies for controlling this species should consider concentrating trapping effort during the activity peak, using green sticky traps to enhance the capture success of each trap, with the lowest impact over non-target species.

中文翻译：

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使用粘性陷阱评估侵入性黑飞虱 Ricania speculum (Walker, 1851) 的颜色反应和活动节律

为了有效，外来入侵物种的管理策略不能忽视它们的时空行为，特别是那些对人类活动造成严重破坏的行为。黑飞虱利卡尼亚窥镜是一种亚洲昆虫，据报道在意大利是一种外来入侵物种，威胁当地植物多样性，包括重要作物。在我们的工作中，我们通过循环统计分析了该物种的活动节律以及变色陷阱捕获成年个体的效率。捕获是在意大利中部进行的，在 2009 年首次发现黑飞虱后，该地区的范围显着扩大。我们观察到该物种主要是黄褐飞虱，具有很高的两性活动重叠。7-8月和9-10月的活动节奏发生变化，日照变化，但在日落时达到高峰，在后半夜和清晨最低。昆虫大多被绿色陷阱捕获，特别是在九月，这是在叶子内产卵的时期；相反，橙色的被避免，黄色的被捕获，与其当地的可用性成比例。控制该物种的策略应考虑在活动高峰期集中诱捕工作，使用绿色粘性诱捕器提高每个诱捕器的捕获成功率，对非目标物种的影响最小。