![]() If multiple TOH trees were present, the largest tree or stand of multiple trees was chosen, since SLF are thought to be visually attracted to larger host trees. Latitude and longitude of the host were recorded. At each site, inspectors spent 5 minutes visually scanning the tree(s) or grapevine(s) and surrounding vegetation for signs of SLF nymphs, adults, egg masses, feeding damage, and honeydew. Satellite view maps of the target locations with 1/4 and 1/2-mile buffers were provided. Inspectors were instructed to find one or more survey sites with hosts near each target location, working from the target location outward up to 1/2 mile. (Photos: (a) Lawrence Barringer, (b) Pennsylvania Department of Agriculture) ![]() Regarding 008A receivers, sites likely to store received and potentially infested materials outdoors for longer periods were prioritized, such as PODS® and similar containerized moving systems, trucking companies, and distributors with many trailers on site.įigure 3: Aggregations of Lycorma delicatula (a) nymphs and (b) adults on TOH/ Ailanthus altissima. campgrounds receiving large volumes of out-of-state visitors.port areas receiving cargo, containers, and other potentially infested material such as dunnage from Asia where Asian defoliating moth traps are currently serviced and. ![]() direct stone importers potentially receiving material from infested areas of Asia.sites receiving multiple shipments of goods directly from SLF-quarantined areas in the eastern United States since 2018 as determined by records of gypsy moth hold notices issued by the border protection stations (Form 008A).major railyards receiving a high volume of railcars from the eastern United States (Roseville) and Asia (those receiving cargo from the ports of Los Angeles and Long Beach).The potential high-risk locations targeted in the survey were: Mehrhoff, University of Connecticut, (c) Jan Amanek, Phytosanitary Administration, (d) Chuck Bargeron, University of Georgia). (All photos from : (a) Catherine Herms, The Ohio State University, (b) Leslie J. Tree of Heaven:įigure 1: (a) Tree of Heaven thicket, (b) leaves, (c) flowers, and (d) seeds. 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. Movement of eggs from infested areas of the eastern United States and from infested areas of Asia was also considered. The survey is focused on areas of high risk of introduction where the preferred host, tree of heaven (TOH, Ailanthus altissima), is found. No evidence of SLF infestation has been found during the survey in any year. This approach was modelled after a risk-based survey that was further refined and executed again in 2021. Statewide Risk-Based Survey OverviewĪ continuous monitoring effort to determine whether spotted lanternfly (SLF, Lycorma delicatula) may be present in California was developed and implemented in 2020. Statewide surveillance activities for Spotted Lanternfly in 2021 included a visual survey of host plants near high-risk target locations as well as air cargo flight inspections and border patrol station inspections.
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