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10-Minute Presentation

Plant-Insect Ecosystems

10-min: P-IE, IPM - General 2

Spotted lanternfly impacts on eastern U.S. forest plants: A mesocosm experiment

Sunday, November 10, 2024
9:36 AM – 9:48 AM MST
Location: Phoenix Convention Center, 221 C, PCC
Oral Presentation
Spotted lanternfly (Lycorma delicatula; SLF) is an invasive fulgorid established and spreading throughout the eastern United States. Although damage in viticulture has been noted, its effect on native forest plants is less understood. SLF feeds most vigorously on a narrowed host range in the 4th instar and adult stages; thus, impacts are expected to be confined to these preferred host species. We conducted an experiment where SLF numbers were controlled at high (48), low (12), and control (0) densities in a 28.3 m3 mesocosm enclosure with plant species native to the eastern U.S. (four trees, three vines, and one shrub). We introduced 4th instars then adults beginning in July and recorded the number of SLF on plants throughout the season to assess cumulative SLF pressure. We measured plant physiological variables related to photosynthesis and assessed plant health before SLF introduction and throughout the season until leaf drop. We will discuss impacts on plant health, photosynthesis, and growth in relation to SLF feeding pressure, as well as compounding effects over multiple years.