Spotted lanternfly (Lycorma delicatula) is a recently introduced pest in the United States, where it threatens the wine, timber, and ornamentals industries. Knowledge of the dispersal ability of L. delicatula is key to developing effective management strategies for this invasive pest. We conducted a mark, release, re-sight study, marking nymphs with fluorescent powders and observing dispersal distances from a central release point at three time points over 7 d following release. To examine how dispersal patterns changed over the course of nymphal development, we repeated this process for each of L. delicatula's four instars. All releases were conducted in contiguous, deciduous forest, which is a widespread habitat type within L. delicatula's invaded range and a habitat where this pest may have negative ecological and economic impacts. We found that nymphs displayed clear directionality in their movement following release, apparently preferring to move uphill on the modest 6° grade at our release site. Most nymphs remained near the release location, while some moved tens of meters. The maximum displacement we observed was 65 m from the release point, 10 d after release. Nymphs were re-sighted singly and in small groups on a variety of trees, shrubs, and understory vegetation. All four instars had similar dispersal distances over time, though third instar nymphs moved farthest on average, with estimated median displacement of 16.9 m 7 d after release. Further studies are needed to provide additional information on what factors influence spotted lanternfly dispersal.

中文翻译：

---

Lycorma delicatula（半翅目：Fulgoridae）若虫通过连续落叶林的传播

斑点灯笼蝇 (Lycorma delicatula) 是最近在美国引入的一种害虫，它威胁着葡萄酒、木材和观赏植物行业。了解 L. delicatula 的传播能力是为这种入侵性害虫制定有效管理策略的关键。我们进行了标记、释放、重新观察研究，用荧光粉标记若虫并观察释放后 7 d 内三个时间点与中心释放点的分散距离。为了检查散布模式在若虫发育过程中是如何变化的，我们对 L. delicatula 的四个龄期中的每一个都重复了这个过程。所有释放都在连续落叶林中进行，这是 L. delicatula 入侵范围内的广泛栖息地类型，也是这种害虫可能对生态和经济产生负面影响的栖息地。我们发现若虫在释放后的运动中表现出明确的方向性，显然更喜欢在我们的释放地点在适度的 6° 坡度上向上移动。大多数若虫留在释放地点附近，而有些则移动了数十米。我们观察到的最大位移是离释放点 65 m，释放后 10 天。若虫在各种树木、灌木和林下植被上单独或成群地被重新观察。随着时间的推移，所有四龄若虫都有相似的扩散距离，尽管三龄若虫平均移动最远，估计释放后 7 天的中位位移为 16.9 m。需要进一步研究以提供有关影响斑点灯笼蝇传播的因素的更多信息。显然更喜欢在我们发布地点的适度 6° 坡上移动。大多数若虫留在释放地点附近，而有些则移动了数十米。我们观察到的最大位移是离释放点 65 m，释放后 10 天。若虫在各种树木、灌木和林下植被上单独或成群地被重新观察。随着时间的推移，所有四龄若虫都有相似的扩散距离，尽管三龄若虫平均移动最远，估计释放后 7 天的中位位移为 16.9 m。需要进一步研究以提供有关影响斑点灯笼蝇传播的因素的更多信息。显然更喜欢在我们发布地点的适度 6° 坡上移动。大多数若虫留在释放地点附近，而有些则移动了数十米。我们观察到的最大位移是离释放点 65 m，释放后 10 天。若虫在各种树木、灌木和林下植被上单独或成群地被重新观察。随着时间的推移，所有四龄若虫都有相似的扩散距离，尽管三龄若虫平均移动最远，估计释放后 7 天的中位位移为 16.9 m。需要进一步研究以提供有关影响斑点灯笼蝇传播的因素的更多信息。释放后10 d。若虫在各种树木、灌木和林下植被上单独或成群地被重新观察。随着时间的推移，所有四龄若虫都有相似的扩散距离，尽管三龄若虫平均移动最远，估计释放后 7 天的中位位移为 16.9 m。需要进一步研究以提供有关影响斑点灯笼蝇传播的因素的更多信息。释放后10 d。若虫在各种树木、灌木和林下植被上单独或成群地被重新观察。随着时间的推移，所有四龄若虫都有相似的扩散距离，尽管三龄若虫平均移动最远，估计释放后 7 天的中位位移为 16.9 m。需要进一步研究以提供有关影响斑点灯笼蝇传播的因素的更多信息。