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MONDAY, JANUARY 11, 2021. BY EDWARD SOUTHWICK, CDFA.
Statewide activities for Pest Detection/Emergency Projects Branch in 2020 included a visual survey of host plants near high-risk target locations as well as air cargo flight inspections.
Overview
To determine whether spotted lanternfly (SLF, Lycorma delicatula) could be present in California, a risk-based survey was developed and executed in the summer of 2020.
No evidence of SLF infestation was found during the survey. This survey focused on areas of a high risk of introduction where the preferred host, tree of heaven (TOH, Ailanthus altissima), is found. The movement of eggs from infested areas of the eastern United States and from infested areas of Asia was considered. Because SLF is known to lay eggs on any object near its primary host, many of the pathways are similar to those of gypsy moth movement, including vehicles, outdoor articles, containers, and packing materials. The first US detection in Pennsylvan