Title: Chemical management strategies for the invasive Jorō spider, <i>Trichonephila clavata </i>(Araneae: Araneidae)

Historically, spider management has received relatively little attention in the literature compared to insect pests, and few studies have examined the efficacy of chemical management strategies on orbweaver mortality and web site fidelity. However, the introduction and rapid spread of the Jorō spider, Trichonephila clavata (L. Koch, 1878; Araneae: Araneidae), in North America has created a wave of media and public awareness. Characterized by its large size, bright coloration, dense aggregations, and durable webs, this species has garnered concern from residents who wish to manage this pest. Internet-based advice ranges from using products labeled for arthropod control to common products around the home. Our study evaluated spider mortality from eleven separate products and two control treatments (water and no treatment at all). High doses of pyrethroid pesticides or essential oil and detergent-based pesticides were highly effective in killing T. clavata. Although spraying foaming dish soap and machine lubricant also led to high mortality rates, we do not condone the use of products outside of their registered label use. We also evaluated several products that did not cause high mortality for their potential to cause T. clavata to abandon their webs - a result that may be just as desirable for residents - though none of these products led to high rates of web abandonment. We strongly recommend that property managers carefully weigh the pros and cons and safety aspects of different management strategies (including mechanical management) and assess whether T. clavata management is warranted in the first place.长期以来，相较于昆虫害虫，蜘蛛防治在相关学术文献中受到的关注相对有限，且鲜有研究探讨化学防治策略对圆网蛛（orbweaver）死亡率及蛛网位点保真度的影响。然而，Jorō蜘蛛（棒络新妇蛛，*Trichonephila clavata*，L. Koch, 1878；蜘蛛目: 园蛛科）在北美地区的传入与快速扩散，引发了媒体与公众的广泛关注。该物种体型硕大、体色艳丽、集群密度高且蛛网结实耐用，引发了有意对其开展防治的当地居民的担忧。网络上流传的防治建议涵盖了标注用于节肢动物防治的药剂，乃至居家常见的各类用品。 本研究针对11种不同药剂及2种对照处理（清水处理与空白对照）的蜘蛛致死效果开展了评估。高剂量的拟除虫菊酯类农药，或以精油与洗涤剂为主要成分的农药，对棒络新妇蛛均展现出极高的致死效果。尽管喷施起泡洗洁精与机械润滑剂同样可达到较高的致死率，但我们不建议使用未在注册标签规定范围内的产品。此外，我们还针对部分致死效果不佳的药剂，评估了其诱导棒络新妇蛛放弃原有蛛网的潜在可能性——这一效果对于居民而言同样具有实用价值——但所有受试药剂均未实现较高的蛛网弃置率。我们强烈建议物业管理人员审慎权衡各类防治策略（包括物理防治）的利弊与安全性能，并首先评估开展棒络新妇蛛防治是否具备必要性。