Performance and host association of spotted lanternfly (Lycorma delicatula) among common woody ornamentals

Abstract Lycorma delicatula (spotted lanternfly) has a broad host range with strong preference for the invasive plant from its native range, tree of heaven ( Ailanthus altissima); it had long been speculated that L. could not develop or reproduce without access to . In 2019, we found this assumption was incorrect, but fitness reduced in absence A. altissima number egg masses laid dramatically fewer insects reared on suitable non- plants recently established. We hypothesized longer established, larger trees (of same species) would improve heaven. spring 2020, examined insect performance and by tracking development, survival, association oviposition large enclosures planted two years prior study. Each enclosure included one each Juglans nigra , Salix babylonica Acer saccharinum along either Betula nigra; these twice diameter previous year. nymphs released them into corresponding as third instars, monitored early July 2020 through November 2020. also determined whether lack parents have any effects offspring performance. To ensure adequate adult populations comparing fecundity between treatments, instars were multi-tree due high mortality earlier occurred similar study 2019. Insect survival higher development faster Third fourth instar most frequently observed when present, while adults equally associated S. babylonica, often Females deposited nearly 7-fold more than those altissima, which is consistent difference mass numbers treatments year; thus, our hypothesis rejected. The showed time never These findings suggest managers need be aware even landscape, several hardwood can utilized reproduce, likely still reduced.