<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Phragmites spreads primarily from disturbance, as roadside mowing promotes new rooting from every leaf node. It is best controlled with an herbicide treatment of a combination of glyphosate and imazapyr, followed by fire during the winter to remove the thatch layer. Then a touch up herbicide treatment the following year. <br><br><div id="AppleMailSignature" dir="ltr">Rick Johnstone </div><div dir="ltr"><br>On Feb 1, 2019, at 1:43 PM, Liz Nalle <<a href="mailto:liznalle5@gmail.com">liznalle5@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div><div dir="auto">Miscanthus and Pennisetum are both problems in coastal Delaware but I would add that they spread primarily from being planted, then the seeds are wind blown. Regarding Phrag, some areas here have given up on eradication, and are now concentrating on managing it, if that’s even possible. We are very prone to flooding, though, so with sea level rise which we are living, it will be interesting to see it move as it doesn’t tolerate standing water. </div></div><div dir="auto"><br></div><div dir="auto">Excellent point about Baccharis spreading due to road salt! I see it in many more places recently. </div><div dir="auto"><br></div><div dir="auto">Liz</div><div><br><div class="gmail_quote"><div dir="ltr">On Fri, Feb 1, 2019 at 1:14 PM Judy Fulton <<a href="mailto:jfulton5@gmail.com">jfulton5@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p><font face="Helvetica, Arial, sans-serif">When people mention
groundsel tree, I'm assuming that they are referring to
Baccharis halimifolia. This species is a native to the Coastal
Plain ecoregions throughout the mid-Atlantic, but it is becoming
adventive in the Piedmont and various mountain ecoregions. I
agree with Margaret Chatham that a likely reason for this
movement is salt tolerance -- I see the plant fairly frequently
in the difficult strip next to highways that have been treated
with salt. So, I'm not sure that </font><font face="Helvetica,
Arial, sans-serif"><font face="Helvetica, Arial, sans-serif">Baccharis
halimifolia is going to become a problem.</font><br>
<br>
Judy</font><br>
</p>
<div class="m_2895971027535984572moz-signature">____________________________________________<br>
<br>
Judith P. Fulton<br>
EcoPlant Consulting: Native and Invasive Plants<br>
Master Gardener, University of Maryland Extension<br>
Chair, Maryland Invasive Species Council Subcommittee on Invasives
Lists<br>
Board, Mid-Atlantic Invasive Plant Council<br>
410-337-3701<br>
<a href="mailto:jfulton5@gmail.com" target="_blank">jfulton5@gmail.com</a><br>
<br>
</div></div><div text="#000000" bgcolor="#FFFFFF">
<div class="m_2895971027535984572moz-cite-prefix">On 2/1/2019 12:07 PM, MARGARET L
CHATHAM wrote:<br>
</div>
<blockquote type="cite">
I’d suggest another factor at work in the spread of groundsel tree
(and Typha angustifolia): road salt. As the roadways become
saltier, they offer better habitat for salt-tolerant plants. (And
Ii see Miscanthus spread as primarily driven by planted seed
sources — strictly anecdotal comment.)
<div><br>
</div>
<div>Margaret<br>
<div><br>
<blockquote type="cite">
<div>On Feb 1, 2019, at 11:42 AM, Stephen Hiltner
<<a href="mailto:stevehiltner@gmail.com" target="_blank">stevehiltner@gmail.com</a>>
wrote:</div>
<br class="m_2895971027535984572Apple-interchange-newline">
<div>
<div dir="ltr">I'll chime in with a few
observations. The first invasive example of Miscanthus I
saw many years back was in a field outside of Newport,
Rhode Island during my one and only visit there. In NC
at turn of the century it was only invasive on Mount
Mitchell and some horticulturist of great stature,
perhaps the one who wrote "the book" on shrubs/trees,
said in a discussion at NC Bot Gardens that only one
variety of Miscanthus was invasive. In recent years I've
seen examples of invasion in NJ and PA along freeways.
<div><br>
</div>
<div>Groundsel tree is one to look out for, as
it spread from the NC coast up freeways into the
piedmont and has become a serious invasive in the
Durham, NC area, invading grasslands and lining
freeway right of ways. Seen a few incidents in central
NJ but not much yet.</div>
<div><br>
</div>
<div>Go to Princeton battlefield, and it's hard
to imagine porcelainberry getting any worse--topiary
on a massive scale.</div>
<div><br>
</div>
<div>Steve</div>
<div><a href="http://princetonnaturenotes.org/" target="_blank">PrincetonNatureNotes.org</a></div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Feb 1, 2019 at
10:55 AM Liz Nalle <<a href="mailto:liznalle5@gmail.com" target="_blank">liznalle5@gmail.com</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">
<div>Here
in southern, coastal Delaware, Phragmites australis
and Hydrilla verticillata are big problems. I’m not
sure how much climate change has facilitated their
spread, but they are from father south in Asia I
believe.
<div><br>
</div>
<div>Liz Nalle</div>
<div>Inland Bays Garden Center</div>
<div>Frankford DE<br>
<div><br>
<blockquote type="cite">
<div>On Jan 31, 2019, at 9:36 PM, Jil
Swearingen <<a href="mailto:jilswearingen@gmail.com" target="_blank">jilswearingen@gmail.com</a>>
wrote:</div>
<br class="m_2895971027535984572gmail-m_-363393513379177317Apple-interchange-newline">
<div>
<div dir="ltr">
<div class="gmail_default" style="font-size:small">All,</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">EDDMapS might be
enlisted here to help. If one can do a
query over time (e.g., 20-30 years) of
invasive plant species occurring in the
Southeast states that eventually start
being reported in the mid-Atlantic in
recent years, that would produce a list
to start working with. Chuck Bargeron
would be the obvious go-to person to run
this query. I don't know how to do it
with the tools available for users.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Thanks,</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Jil</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">.......................</div>
<div>
<div dir="ltr" class="m_2895971027535984572gmail-m_-363393513379177317gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div>Jil
Swearingen</div>
<div>Invasive
Species
Consultant</div>
<div><i>In
the Weeds</i></div>
<div>410-200-7085</div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu,
Jan 31, 2019 at 9:22 PM James Remuzzi
<<a href="mailto:james@sustainablesolutionsllc.net" target="_blank">james@sustainablesolutionsllc.net</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">
<div dir="auto">I would second
the USDA work on CO2 re vines would
add Mile a Minute to those species
previously mentioned —vines: both
invasive and native, have exploded in
last 20 years and are having a
devastating impact on Native Forests
and Shrublands.
<div><br>
<div id="m_2895971027535984572gmail-m_-363393513379177317gmail-m_-500566927301392564AppleMailSignature" dir="ltr">JRR
<div><br>
</div>
<div>James R. Remuzzi</div>
<div>Sustainable
Solutions, LLC</div>
<div><a href="http://www.sustainablesolutionsllc.net/" target="_blank">www.sustainablesolutionsllc.net</a></div>
</div>
<div dir="ltr"><br>
On Jan 31, 2019, at 4:27 PM,
frazmo <<a href="mailto:frazmo@gmail.com" target="_blank">frazmo@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">Lewis
Ziska with USDA has done
interesting work about the
worrying effects of rising CO2
levels on invasive vines (plus
native Poison ivy). My sense
is that Kudzu is gradually
becoming worse in the northern
mid-Atlantic as things warm.
Colder temps used to hold back
Hedera helix in our north but
that obviously is changing.
I'm sure there is a long list
of southern invasives marching
toward us now... Cheers,
Steve Young, Arlington VA<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu,
Jan 31, 2019 at 10:10 AM
Ossi, Damien (DOEE) <<a href="mailto:damien.ossi@dc.gov" target="_blank">damien.ossi@dc.gov</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">
<div lang="EN-US">
<div class="m_2895971027535984572gmail-m_-363393513379177317gmail-m_-500566927301392564gmail-m_-942661419995186456WordSection1">
<p class="MsoNormal">Question:
What, if any, invasive
plant species appear
to be spreading into
the mid-Atlantic due
to climate change? I
know there’s been talk
of southern magnolia
and other species that
are native to just
south of here starting
to naturalize in our
area, but I’m more
interested exotic
invasives. </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">What
invasive plants are
common in southern
Virginia or northern
North Carolina that we
just don’t have in our
area, but could move
here with warmer
climates?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks,</p>
<p class="MsoNormal">Damien</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><b><span style="font-size:10pt">Damien P.
Ossi</span></b></p>
<p class="MsoNormal"><span style="font-size:10pt">Wildlife Biologist</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Fisheries and Wildlife Division</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Department of Energy & Environment</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Government of the District of Columbia</span></p>
<p class="MsoNormal"><span style="font-size:10pt">1200 First Street NE, 5th Floor</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Washington, DC 20002</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Desk: (202) 741-0840</span></p>
<p class="MsoNormal"><span style="font-size:10pt">Web: <a href="http://www.doee.dc.gov/" target="_blank">
<span style="color:blue">doee.dc.gov</span></a></span></p>
<p class="MsoNormal"> </p>
</div>
</div>
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