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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif;color:#1F497D'>For the last 2 decades I have removed all the specimens in a population either by mechanical or chemical treatment.<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif;color:#1F497D'> <o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>Marc Imlay, PhD, Conservation biologist, Chair, MAIPC (Mid Atlantic Invasive Plant Council) Biological control working Group<o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>Board Member, Maryland Native Plant Society,<o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:18.0pt;font-family:"Arial",sans-serif'>Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland Chapter of the Sierra Club.</span></b><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'><o:p></o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>Park Ranger Office, Non-native Invasive Plant Control coordinator. <a href="mailto:Marc.Imlay@pgparks.com" target="_blank"><span style='color:windowtext;text-decoration:none'>Marc.Imlay@pgparks.com</span></a></span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'><a href="tel:(301)%20442-5657" target="_blank">(301) 442-5657</a> cell Natural and Historical Resources Division</span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>The Maryland-National Capital Park and Planning Commission</span></b><o:p></o:p></p><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif;color:#1F497D'><o:p> </o:p></span></b></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>From:</span></b><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'> MAIPC [mailto:maipc-bounces@lists.maipc.org] On Behalf Of Kathryn Peterson-Lambert<br>Sent: Thursday, March 09, 2017 2:12 PM<br>To: maipc@lists.maipc.org<br>Subject: Re: [MAIPC] MAIPC Digest, Vol 65, Issue 3 -Message 2<o:p></o:p></span></b></p></div></div><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></b></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>On Mar 7, 2017, at 8:47 AM, Kathryn Peterson-Lambert <<a href="mailto:triplam747@aol.com">triplam747@aol.com</a>> wrote:<o:p></o:p></span></b></p></div><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></b></p><div><div><p class=MsoNormal><b><span style='font-size:16.0pt;font-family:"Arial",sans-serif'>Hello and great point regarding chemical resistance - this is a biological process that is present everywhere - in my IPM classes that I had with Mark and also in Pennsylvania - it was suggested that rotating the use of chemicals would alleviate some of this resistance - it is similar to the antibiotic resistance that humans develop to bacteria - using the products correctly and not abusing them also helps - much like the IPM - Mark suggested using a lower dosage on the conservative side to treat problems - rather than too much. This combined with a rotation of chemicals and without a sole reliance on the chemicals. Mechanical, biological, other methods are available - once a chemical has not been used for three years or so - then the plants after so many generations respond to the chemical again. <o:p></o:p></span></b></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Mar 6, 2017, at 4:43 PM, <a href="mailto:maipc-request@lists.maipc.org">maipc-request@lists.maipc.org</a> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Send MAIPC mailing list submissions to<br><span class=apple-tab-span> </span><a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br><span class=apple-tab-span> </span><a href="http://lists.maipc.org/listinfo.cgi/maipc-maipc.org">http://lists.maipc.org/listinfo.cgi/maipc-maipc.org</a><br>or, via email, send a message with subject or body 'help' to<br><span class=apple-tab-span> </span><a href="mailto:maipc-request@lists.maipc.org">maipc-request@lists.maipc.org</a><br><br>You can reach the person managing the list at<br><span class=apple-tab-span> </span><a href="mailto:maipc-owner@lists.maipc.org">maipc-owner@lists.maipc.org</a><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of MAIPC digest..."<br><br><br>Today's Topics:<br><br> 1. 2 upcoming meetings + Faith's blog about inv spp intro rates<br> (<a href="mailto:Phytodoer@aol.com">Phytodoer@aol.com</a>)<br> 2. Invasive Management as a Selection Pressure (frazmo)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Mon, 6 Mar 2017 11:03:43 -0500<br>From: <a href="mailto:Phytodoer@aol.com">Phytodoer@aol.com</a><br>To: <a href="mailto:necis@lists.nationalwildlife.org">necis@lists.nationalwildlife.org</a>, <a href="mailto:ficmnew@ls.ars.usda.gov">ficmnew@ls.ars.usda.gov</a>,<br><span class=apple-tab-span> </span><a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a><br>Subject: [MAIPC] 2 upcoming meetings + Faith's blog about inv spp<br><span class=apple-tab-span> </span>intro rates<br>Message-ID: <<a href="mailto:1983feb.235d5b14.45eee25e@aol.com">1983feb.235d5b14.45eee25e@aol.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>Hello,<br>forest pest mavens & others<br><br>I have posted a blog at _www.cisp.us_ (<a href="http://www.cisp.us">http://www.cisp.us</a>) or <br>_www.nivemnic.us_ (<a href="http://www.nivemnic.us">http://www.nivemnic.us</a>) that reports on the Hanno Seebens & 40+ <br>colleagues - showing that introductions of invasive species continued to rise <br>in the 20th Century & first years of the 21st ... policies are not yet <br>adequately effective in turning back this tidal wave ...<br><br>2 meetings in May provide opportunity to join others working on these <br>problems. <br><br>1) The North American Invasive Species Forum - which meets every other year <br>- is meeting in Savannah, GA on May 9 - 11. I hope this meeting will help <br>bridge the gap between "invasive species" activists and official <br>"phytosanitary" types. The agenda and registration information is at <br><a href="http://www.invasivespecies2017.org/">http://www.invasivespecies2017.org/</a><br><br>2) IUFRO section on Foliage, shoot and stem diseases of forest trees will <br>be in Niagara Falls, Ontario on May 7-11, 2017. This year?s meeting theme: <br>Invasive Forest Pathogens & Implications for Biology and Policy. Details <br>are at <a href="https://www.cif-ifc.org/iufroworkingparty2017/">https://www.cif-ifc.org/iufroworkingparty2017/</a><br><br>Wish I could go to both!<br><br>Faith Campbell<br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/f30715ea/attachment.html">http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/f30715ea/attachment.html</a>><br><br>------------------------------<br><br>Message: 2<br>Date: Mon, 6 Mar 2017 15:09:38 -0500<br>From: frazmo <<a href="mailto:frazmo@gmail.com">frazmo@gmail.com</a>><br>To: "<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a>" <<a href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a>><br>Subject: [MAIPC] Invasive Management as a Selection Pressure<br>Message-ID:<br><span class=apple-tab-span> </span><<a href="mailto:CAOO+nP-_XmaoR=nJmKOdZxuS+nhuxZfjwa9o0KjQg1EW7iRKJw@mail.gmail.com">CAOO+nP-_XmaoR=nJmKOdZxuS+nhuxZfjwa9o0KjQg1EW7iRKJw@mail.gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>It?s well known that pesticide use can cause the development of chemical<br>resistance in target insects and plants. Based on anecdotal information and<br>personal observations, non-chemical invasive plant control efforts appear<br>to be able to cause the development of ?resistance-like? adaptations in<br>plants. When we engage in sustained management activity on an invasive<br>plant at a site, we can create selection pressure on the plant. Unwittingly<br>we may serve like plant breeders trying to create desirable new varieties,<br>but creating undesirable new varieties that could become more challenging<br>to manage.<br><br>Several examples. These are based on anecdotes and personal observations,<br>and I am hoping that perhaps some folks will be inspired to gather data and<br>study this more closely. When Japanese Stiltgrass invades a frequently<br>mowed area like a managed lawn, I have seen reports that it adapts to<br>flower and set seed even in the face of the mowing. I have noted that as we<br>have intensified efforts to control Garlic Mustard by hand pulling, it may<br>be adapting by flowering and developing viable seed earlier, in advance of<br>when we have tended to focus our pulling efforts. (I realize that a<br>confounding factor here is our increasing warming trend.) Also, I think I?m<br>seeing signs that we are selecting out the tallest, most robust plants, and<br>seeing more ?stunted? plants that may be harder to spot, yet still produce<br>seeds. Upper parts of plants may detach more readily leaving viable roots<br>behind, and un-pulled plants may have a second bloom later in the season.<br><br>Finally, over twenty-plus years of pulling English Ivy at Long Branch<br>Nature Center in Arlington, Virginia, I have noticed recently that more of<br>the remaining ivy seems to have a new characteristic. The vines seem to be<br>more fragile. Before, most vines pulled up very cooperatively, leaving few<br>rooted stem fragments. Now I find more uncooperative vines that go to<br>pieces on me, creating more work to find and pull all the viable remnants.<br>I believe that we?ve inadvertently selected for this trait.<br><br>In closing, my key point is that we in the invasive plants community should<br>be conscious of the possibility that we are selecting for resistant traits.<br>We should monitor for signs and consider changing up our practices<br>occasionally to reduce the risk of developing non-chemical resistance.<br><br>Cheers,<br><br>Steve Young, Volunteer, Arlington VA (past MAIPC Treasurer)<br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/68d7c869/attachment-0001.htm">http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20170306/68d7c869/attachment-0001.htm</a>><br><br>------------------------------<br><br>Subject: Digest Footer<br><br>_______________________________________________<br>MAIPC mailing list<br><a href="mailto:MAIPC@lists.maipc.org">MAIPC@lists.maipc.org</a><br><a href="http://lists.maipc.org/listinfo.cgi/maipc-maipc.org">http://lists.maipc.org/listinfo.cgi/maipc-maipc.org</a><br><br><br>------------------------------<br><br>End of MAIPC Digest, Vol 65, Issue 3<br>************************************<o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div><br />
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