<div dir="ltr">No idea about it over time, but even in urban parts of Philly, it's common to see it on the sidewalk or people. So with an infestation this intense even in the sidewalk jungle, I don't imagine it petering off much if at all. And as for plants, so far I have seen it on tree of heaven, porcelain berry, native eastern columbine, and my hot peppers.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 17, 2020 at 4:42 PM Barringer, Dan <<a href="mailto:dbarringer@natlands.org">dbarringer@natlands.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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While last year I thought that the leading wave was where it was worst, and it may still be, 2019 was a light year for us for spotted lanternfly (Northwestern Chester County, within an hour’s drive of the initial infestation in Berks County, and not far from
Pottstown cited in the article below). But 2020 is proving to be a heavy nymph infestation again, more like 2018. So I am thinking it may not have a fading impact over time after all, but somewhat cyclical in pattern even if never reaching the initial wave’s
numbers. We’ve definitely seen young black walnut trees severely impacted by it, severely disfigured. We didn’t have any ailanthus trees on the 621 acre preserve I manage, but as we grew this year to 712 acres we acquired a nearby grove which I treated with
Garlon 4 and subsequently have begun cutting down (I checked first with Penn State researchers about making some into trap trees, but they did not need them for their research, and I wanted the ailanthus gone). This year the nymphs are heavy on these trees
(even though they are now dead) but that may also be because there was Oriental bittersweet growing on them. While past nymph populations were heavy on walnut and grape, this year they are heavy on Oriental bittersweet and multiflora rose. Adults were previously
heavy on Virginia creeper and red maple (and buildings and ourselves); I’ll be interested to compare the adults in September with previous years' patterns. I think it is difficult to make any generalization about the impact of this species at this time, other
than to venture to say they are having some impact and they likely are here to stay.
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<div>Dan<br>
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<div>On Jul 17, 2020, at 2:37 PM, Stephen Hiltner <<a href="mailto:stevehiltner@gmail.com" target="_blank">stevehiltner@gmail.com</a>> wrote:</div>
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<div>Can anyone offer insights into whether the lanternfly is causing increasing problems in areas where it has become established, or if its numbers are tending to fade into the background? Are there places where it's becoming entrenched as a big
nuisance? A couple sources like the one below have suggested a fading impact over time.</div>
<div><a href="https://www.pottsmerc.com/news/local/5-years-into-the-spotted-lanternfly-invasion/article_19edc06e-acaa-11e9-a4d0-e323ff09d976.html" style="font-family:Times;font-size:inherit" target="_blank">https://www.pottsmerc.com/news/local/5-years-into-the-spotted-lanternfly-invasion/article_19edc06e-acaa-11e9-a4d0-e323ff09d976.html</a><br>
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<div>We're having a few nymphs show up here in Princeton.</div>
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<div>Steve</div>
<div><a href="http://princetonnaturenotes.org/" target="_blank">PrincetonNatureNotes.org</a></div>
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