Escobar et al. 2025. Spotted lanternfly habitat and host tree preferences: increased abundance in developed areas
by Katherine Escobar (primary author), Angela Berardo, Daniel Knuth, Aspen Pawlicki, and Dr. Allyson Jackson
Abstract
The spotted lanternfly (Lycorma delicatula) is an invasive insect that continues to spread throughout the eastern United States, feeding on a variety of woody plants. This study examined habitat type, host-tree species, tree size, and seasonal timing influence SLF abundance on the SUNY Purchase College campus. 29 trees were monitored representing four common host species: Black Walnut, Norway Maple, Red Maple, and Sugar Maple in both developed and forested areas. Each tree was fitted with a trunk trap, and SLFs were counted biweekly from late July through mid-September. Individuals were identified by life stage so that changes from nymphs to adults could be tracked over time. SLF abundance was much higher in developed areas than in forest sites across all species. Black Walnut and Norway Maple in developed areas supported the highest numbers, while Red and Sugar Maple had lower totals overall. Adult SLF numbers increased steadily from August into September, matching the expected timing of 4th instar molting. Fourth instars were also more common in developed habitats, suggesting that these areas may support better survival or growth during later life stages. Tree diameter (DBH) did not show a clear relationship with SLF totals, indicating that tree size was not an important predictor of infestation in this dataset. Overall, the results showed that habitat type and host species were the strongest factors influencing SLF abundance on campus, while tree size had little effect. These findings highlight how human-modified environments can support higher SLF populations and may act as hotspots for their spread.