Spotted lanternfly (SLF) is an invasive insect pest in the northeastern USA, and current projections suggest global spread of this insect. SLF is particularly damaging in grape; however, little is known about SLF activity and phenology in vineyards. In 2018–2019, adult SLF populations were monitored in 7–9 Pennsylvania vineyards using weekly visual assessments of vines. Additional studies were carried out in 2019 to identify the daily activity (e.g., feeding, mating, flying) of SLF adults in vineyards. Weekly monitoring data revealed that adults infested vineyards in late summer and populations peaked in early to mid-September. Nymphs were observed on vines in the spring, but nymphal populations did not persist at high levels throughout the season (< 5 SLF/vine). Prior to harvest, SLF was predominantly found on the shoots, but after harvest, greatest proportions of SLF were found on the trunk. Both feeding and dispersal activity increased throughout the day with greatest proportions of these activities observed in the afternoon and evening compared to morning observations. Daily increases of SLF on vines were positively correlated with SLF dispersal, suggesting high input from the surrounding landscape and potential need for area-wide management of this pest. Understanding seasonal patterns of SLF may improve management of this pest through timing control measures with population influxes both diurnally and seasonally.

中文翻译：

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美国东部葡萄园斑蝶（Lycorma delicatula）的季节物候和活动。

斑灯笼蝇（SLF）是美国东北部的一种入侵性昆虫，目前的预测表明该昆虫在全球范围内传播。SLF对葡萄尤其有害。然而，对于葡萄园中的SLF活性和物候学知之甚少。在2018–2019年，使用每周的葡萄藤目测评估，在宾夕法尼亚州7–9个葡萄园中监测了成年SLF种群。2019年进行了进一步的研究，以确定葡萄园中SLF成虫的日常活动（例如，进食，交配，飞行）。每周监测数据显示，成年夏季后期成年人感染了葡萄园，而种群数量在9月初至9月中旬达到高峰。春季在葡萄藤上观察到若虫，但整个季节中若虫种群并未持续高水平（<5 SLF /株）。收割前，主要在芽上发现了SLF，但收割后，在树干上发现最大比例的SLF。进食和分散活动全天都在增加，与早晨的观察相比，在下午和晚上观察到的这些活动的比例最大。葡萄藤上SLF的每日增加与SLF的扩散呈正相关，表明周围景观的大量投入以及对该害虫进行全域管理的潜在需求。了解SLF的季节性模式可能会通过定时控制措施（昼夜和季节性都大量涌入）来改善对这种有害生物的管理。葡萄藤上SLF的每日增加与SLF的扩散呈正相关，表明周围景观的大量投入以及对该害虫进行全域管理的潜在需求。了解SLF的季节性模式可能会通过定时控制措施（昼夜和季节性都大量涌入）来改善对这种有害生物的管理。葡萄藤上SLF的每日增加与SLF的扩散呈正相关，表明周围景观的大量投入以及对该害虫进行全域管理的潜在需求。了解SLF的季节性模式可能会通过定时控制措施（昼夜和季节性都大量涌入）来改善对这种有害生物的管理。