<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">The patent on Round-up has run out, years ago. There is no reason for using the name brand stuff. It is usually twice the price or more!<div><br></div><div>You may purchase generic glyphosate with zero surfactant. This is the formulation approved for use on bodies of water. You may use without surfactant or you may add the surfactant of your choice If you add your own surfactant, and it has not been tested, you will need to do your own tests of toxicity.</div><div><br></div><div>The word "toxicity" is defined by federal law when used in conjunction with pesticides (herbicides). The following article has a bit of information about how levels of toxicity are determined, and how you can read pesticide labels to understand the words used. In all cases, it is the "active" ingredient that is tested because this is the way the federal law is written.</div><div><br></div><div><a href="http://smith.agrilife.org/files/2011/06/pesticide_toxicity_3.pdf">http://smith.agrilife.org/files/2011/06/pesticide_toxicity_3.pdf</a></div><div><br></div><div><br></div><div>jb</div><div><br></div><div><br></div><div>On May 13, 2013, at 10:29 AM, Gena Fleming wrote:<div><div><br class="Apple-interchange-newline"><blockquote type="cite"><div class="gmail_quote">Thank you for that information, Marc. I can not find an MSDS on Roundup Classic. Has it been discontinued?<br><br>Signal words are used as a rudimentary ranking system for <i>acute</i>
toxicity. Environmental data concerns are generally addressed in a
different section. You describe Roundup Pro as "harmless" to
amphibians, but the article you attach simply says it is "not lethal",
which is not the same thing.<br>
<br>It is hard to discuss any of this in a meaningful way when
surfactants are not disclosed on the product label. This document is
the best information I have been able to retrieve so far and concluding
statements are pasted below:<br>
<a href="http://www.fs.fed.us/foresthealth/pesticide/pdfs/Surfactants.pdf" target="_blank">http://www.fs.fed.us/foresthealth/pesticide/pdfs/Surfactants.pdf</a><br><br><div dir="ltr" style="font-size:16px;font-family:serif">
<span style="color:rgb(0,0,153)">Comparable data allowing for an assessment of the joint action of glyphosate with the</span></div><span style="color:rgb(0,0,153)">
</span><div dir="ltr" style="font-size:16px;font-family:serif"><span style="color:rgb(0,0,153)">surfactant used in Roundup Pro are not available. The surfactant used in Roundup Pro is a</span></div><div dir="ltr" style="font-size:16px;font-family:serif">
<span style="color:rgb(0,0,153)">phosphate ester neutralized polyethoxylated tallow amine (Monsanto 1996) that is probably</span></div><span style="color:rgb(0,0,153)">
</span><div dir="ltr" style="font-size:16px;font-family:serif"><span style="color:rgb(0,0,153)">similar to the polyethoxylated tallow amine used in Roundup. Consequently, it is reasonable to</span></div><div dir="ltr" style="font-size:16px;font-family:serif">
<span style="color:rgb(0,0,153)">assume that the surfactant in Roundup Pro will enhance the toxicity of glyphosate to aquatic</span></div><span style="color:rgb(0,0,153)">
species.</span><br><br>best,<br>Gena<div class="yj6qo ajU"><div id=":1l4" class="ajR" tabindex="0"><img class="ajT" src="https://mail.google.com/mail/images/cleardot.gif"></div></div><br><br><br>On Fri, May 10, 2013 at 6:24 AM, Marc Imlay <span dir="ltr"><<a href="mailto:ialm@erols.com" target="_blank">ialm@erols.com</a>></span> wrote:<br>
<div dir="ltr" align="left"><font><p><b><font color="#0000ff" face="Arial" size="3">Hi <span>Gena</span>,<br><br>At M-NCPPC we have switched to
Round-up Pro because it is harmless to amphibians<span>
according to the web site: </span></font></b></p><p dir="ltr" class="MsoNormal" align="left"><span style="FONT-FAMILY:Arial;FONT-SIZE:10pt"><a title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm" href="http://www.nps.gov/plants/alien/fact/mivi1.htm" target="_blank"><font title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm" size="3"><span style="COLOR:#0000cc" title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm"><b>http://www.nps.gov/plants/alien/fact/mivi1.htm</b></span></font></a></span></p><p>We dilute the 41% concentrate from Lowes by 20 fold and spray to
wet. </p></font><p><b><span><span style="FONT-SIZE:14pt"><span><span><b><font color="#0000ff" face="Arial" size="3">Marc Imlay, PhD,<br><br>Conservation biologist,
Park Ranger Office<br>Non-native Invasive Plant Control coordinator.<br>(301)
442-5657 cell<br></font></b><a title="blocked::blocked::mailto:ialm@erols.com
blocked::mailto:ialm@erols.com"><font title="blocked::blocked::mailto:ialm@erols.com
blocked::mailto:ialm@erols.com" face="Arial" size="3"><b title="blocked::blocked::mailto:ialm@erols.com
blocked::mailto:ialm@erols.com">ialm@erols.com</b></font></a><br><b><font color="#0000ff" face="Arial" size="3">Natural and Historical Resources Division<br>The
Maryland-National Capital Park and Planning Commission<br></font></b><a title="blocked::blocked::http://www.pgparks.com/
blocked::http://www.pgparks.com/" href="http://www.pgparks.com/" target="_blank"><b title="blocked::blocked::http://www.pgparks.com/
blocked::http://www.pgparks.com/"><font title="blocked::blocked::http://www.pgparks.com/
blocked::http://www.pgparks.com/" face="Arial" size="3">www.pgparks.com</font></b></a></span></span></span></span></b></p><span><span style="FONT-SIZE:14pt"><span><span></span></span></span></span></div>
<div><font color="#0000ff" face="Arial"><span><span style="FONT-SIZE:14pt"><span><span></span></span></span></span></font> </div>
<div><font color="#0000ff" face="Arial"><span><span style="FONT-SIZE:14pt"><span><span> </span></span></span></span></font></div><p dir="ltr" align="left"><br></p><p dir="ltr" class="MsoNormal" align="left"><span style="FONT-FAMILY:Arial;FONT-SIZE:10pt"><a title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm" href="http://www.nps.gov/plants/alien/fact/mivi1.htm" target="_blank"><font title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm" size="3"><span style="COLOR:#0000cc" title="blocked::http://www.nps.gov/plants/alien/fact/mivi1.htm"><b>http://www.nps.gov/plants/alien/fact/mivi1.htm</b></span></font></a></span></p><p dir="ltr" class="MsoNormal" align="left"><i><font color="#12440f" size="4"><span style="FONT-STYLE:italic;COLOR:#12440f;FONT-SIZE:13.5pt">Microstegium
vimineum</span></font></i><font color="#12440f" size="4"><span style="COLOR:#12440f;FONT-SIZE:13.5pt"> (Trin.) Camus </span></font>
<br><font color="#12440f" size="4"><span style="COLOR:#12440f;FONT-SIZE:13.5pt">Grass family
(Poaceae)<br></span></font><font><span style="FONT-SIZE:10pt"><span><image001.gif></span><a title="blocked::http://www.nps.gov/plants/alien/fact/pdf/mivi1.pdf" href="http://www.nps.gov/plants/alien/fact/pdf/mivi1.pdf" target="_blank">Download PDF version
formatted for print</a> (155 KB)</span></font> </p><div> <br class="webkit-block-placeholder"></div><p dir="ltr" align="left"><font><font face="Arial" size="3"><b> </b><font face="Times New Roman"><span style="FONT-STYLE:italic;FONT-SIZE:12pt;FONT-WEIGHT:bold">Chemical<br></span>For
extensive stiltgrass infestations, use of a systemic herbicide such as
glyphosate (e.g., <span style="BACKGROUND:#a0ffff;FONT-WEIGHT:bold">Roundup
Pro</span>®) is a practical and effective method if used with some caution.
Glyphosate is a non-specific herbicide that will kill or damage almost any
herbaceous plant and possibly some woody plants it contacts. <span style="BACKGROUND:#a0ffff;FONT-WEIGHT:bold">Roundup Pro</span>® is
surfactant-loaded (no additional surfactant needed) and the surfactant is not
lethal to amphibians and aquatic invertebrates like the polyoxyethyleneamine
surfactant in Roundup Classic® is. <span style="BACKGROUND:#a0ffff;FONT-WEIGHT:bold">Roundup Pro</span>® carries the
'Caution' signal word while Roundup Classic® carries 'Warning'. When treating
stiltgrass in wetland sites, use Rodeo® or other formulation labeled for
wetlands. Apply a 2% solution of Roundup® or Rodeo® mixed with water (8 oz. per
3 gals. mix) and a surfactant in late summer. Be careful to avoid application to
non-target plants.</font><br></font></font></p><br><br><br><br>
</div><br>
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