<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">I am trying to convince the land managers in my city (Greenbelt, MD) to start managing the invasive plants on some of their land. I am getting some pushback from a community group that says there’s proof that glyphosate will kill or damage
trees and soil biota. I’ve been looking for published papers that would support of refute their arguments, but have been unable to find much. (I don’t have access to JSTOR, BioOne, etc.)
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">They are citing the following documents: <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">(1) Pennsylvania Extension Service: Tree roots absorb glyphosate; it has a much longer half-life than when it is in the soil. A single glyphosate application results in ,persistent stunted leaf growth.
<a href="https://extension.psu.edu/use-glyphosate-with-care-near-trees" target="_blank">
https://extension.psu.edu/use-glyphosate-with-care-near-trees</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">(2) Michigan Extension Service: Herbicides that touch the bark of mature, healthy trees may be absorbed by the outer bark and negatively affect the adjacent vascular tissue.
<a href="http://msue.anr.msu.edu/news/be_careful_where_you_spray_that_stuff" target="_blank">
http://msue.anr.msu.edu/news/be_careful_where_you_spray_that_stuff</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">(3) Glyphosate interferes with the ability of tree roots to absorb manganese, zinc, iron, and boron from the soil; resulting in root rot, reduced cold hardiness, and reduced drought hardiness.
<a href="http://homeguides.sfgate.com/effect-glyphosate-tree-roots-29076.html" target="_blank">
http://homeguides.sfgate.com/effect-glyphosate-tree-roots-29076.html</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have any resources that address these issues, or is there any known comprehensive document that reviews and summarizes independent research on the effects on glyphosate in forest ecosystems?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Damien<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">Damien P. Ossi<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Wildlife Biologist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Fisheries and Wildlife Division<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Department of Energy & Environment<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Government of the District of Columbia<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">1200 First Street NE, 5th Floor<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Washington, DC 20002<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Desk: (202) 741-0840<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Web: <a href="http://www.doee.dc.gov/">
<span style="color:blue">doee.dc.gov</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>