<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1472342905739_10373">Perhaps high rainfall this year reduces the effectiveness of pre emergent herbicide in soils (excessive leaching). 2015 was also a high rainfall spring; 2016 was wet all summer and while having hot weather, we never really had the usual droughts. Agricultural crops are growing like weeds (and record harvest forecast), grass cutters are working overtime, nuisance and invasive vegetation is growing at jaw-dropping rates. <br></div><div id="yui_3_16_0_ym19_1_1472342905739_10426"><br></div><div id="yui_3_16_0_ym19_1_1472342905739_10427">Patrick Kelly, Horticulturist</div><div id="yui_3_16_0_ym19_1_1472342905739_10482">PDK Horticultural, LLC</div><div id="yui_3_16_0_ym19_1_1472342905739_10538">Vegetation Control and Conservation Services</div><div id="yui_3_16_0_ym19_1_1472342905739_10539">Centreville, Maryland<br></div><div id="yui_3_16_0_ym19_1_1472342905739_9799"><span></span></div> <div class="qtdSeparateBR"><br><br></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Saturday, August 27, 2016 11:18 AM, Stephen Hiltner <stevehiltner@gmail.com> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv9253902285"><div><div dir="ltr">Sorry to hear. Perhaps development of a C4 pathway specific herbicide would help, since stiltgrass is said to be one of the few C4 species that grows in the shade? Googling brings up a few results--more than would come up a few years ago.</div><div class="yiv9253902285gmail_extra"><br clear="none"><div class="yiv9253902285gmail_quote">On Sat, Aug 27, 2016 at 10:53 AM, MarneyB <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:marneyb@earthlink.net" target="_blank" href="mailto:marneyb@earthlink.net">marneyb@earthlink.net</a>></span> wrote:<br clear="none"><blockquote class="yiv9253902285gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="yiv9253902285yqt4238469609" id="yiv9253902285yqt43265"><div lang="EN-US"><div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;">On a walk recently on the River Trail at Great Falls MD I noticed that Golden ragwort – <i>Packera aurea</i> - was able to deter Japanese Stiltgrass in an area where this invasive and had taken to a large extent.<u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;"><u></u> <u></u></span></div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;">Marney<u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;"><u></u> <u></u></span></div><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv9253902285MsoNormal"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> MAIPC [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:maipc-bounces@lists.maipc.org" target="_blank" href="mailto:maipc-bounces@lists.maipc.org">maipc-bounces@lists. maipc.org</a>] <b>On Behalf Of </b>Marc Imlay<br clear="none"><b>Sent:</b> Saturday, August 27, 2016 9:39 AM<br clear="none"><b>To:</b> <a rel="nofollow" shape="rect" ymailto="mailto:maipc@lists.maipc.org" target="_blank" href="mailto:maipc@lists.maipc.org">maipc@lists.maipc.org</a><br clear="none"><b>Subject:</b> [MAIPC] Summer Invasives.<u></u><u></u></span></div></div></div><span class="yiv9253902285"></span><div class="yiv9253902285MsoNormal"><u></u> <u></u></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">I have found this year that the Japanese Stiltgrass is no longer controllable over 400 acres of parkland in spites of extensive use of pre-emergents in March. At the 200 acre Swann Park beefsteak is no longer controllable. And many folks have found the same for Wavyleaf basketgrass. . Twenty years ago it was very doable to save all our parks. So mid-late Summer invasives is very sad, especially since stiltgrass is so totally destructive and replaces the other ground vegetation. <u></u><u></u></span></b></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;"><u></u> <u></u></span></b></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">I remind myself that I have been successful with invasives for the rest of the year including garlic mustard and Lesser Celandine. For the late Summer invasives , biological control remains our best hope, both effective host specific from Eurasia, etc. as well as waiting for native biological controls to pop up as with Ailanthus after 200 years. . <u></u><u></u></span></b></div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;"><u></u> <u></u></span></div><div><div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in;"><div class="yiv9253902285MsoNormal"><b>From:</b> Imlay, Marc <br clear="none"><b>Sent:</b> Thursday, August 25, 2016 10:08 AM<br clear="none"><b>To:</b> <br clear="none"><b>Subject:</b> RE: Mniutes from August 2016 board meeting<u></u><u></u></div></div></div><div class="yiv9253902285MsoNormal"><u></u> <u></u></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">A top issue for invasive plant control folks is should we continue to remove all the Asiatic bittersweet, bush honeysuckle, juvenile garlic mustard, Japanese barberry, porcelain berry, beefsteak, multi flora rose, mimosa, wineberry, and mile-a minute. Or switch our resources to Japanese Stilt grass and wavyleaf basket grass that have become so much more abundant and destructive at our high priority sites. <u></u><u></u></span></b></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;"><u></u> <u></u></span></b></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;"><u></u> <u></u></span></b></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">Marc Imlay, PhD, Chair, MAIPC Biological control working Group Conservation biologist, </span></b><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">Park Ranger Office, Non-native Invasive Plant Control coordinator. </span></b><span style="font-size:12.0pt;"><a rel="nofollow" shape="rect" ymailto="mailto:Marc.Imlay@pgparks.com" target="_blank" href="mailto:Marc.Imlay@pgparks.com"><b><span style="color:red;text-decoration:none;">Marc.Imlay@ pgparks.com</span></b></a></span><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;"><a href="" rel="nofollow" shape="rect">(301) 442-5657</a> cell Natural and Historical Resources Division</span></b><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">The Maryland-National Capital Park and Planning Commission</span></b><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;"> </span></b><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><b><span style="font-size:12.0pt;">Marc Imlay, PhD <br clear="none">Chair of the Biodiversity and Habitat Stewardship Committee for the Maryland Chapter of the Sierra Club.</span></b><span style="font-size:12.0pt;"><u></u><u></u></span></div><div class="yiv9253902285MsoNormal"><span style="color:#1f497d;"><u></u> <u></u></span></div><div class="yiv9253902285MsoNormal"><span style="font-size:12.0pt;"><u></u> <u></u></span></div><table class="yahoo-compose-table-card" style="border:none;border-top:solid #d3d4de 1.0pt;" border="1" cellpadding="0" cellspacing="3"><tbody><tr><td colspan="1" rowspan="1" style="width:41.25pt;border:none;padding:9.75pt .75pt .75pt .75pt;" width="83"><div class="yiv9253902285MsoNormal"><span style="font-size:12.0pt;"><a rel="nofollow" shape="rect" target="_blank" href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon"><span style="border:solid windowtext 1.0pt;padding:0in;text-decoration:none;"><img src="cid:IsLur8rWmsIFL1FUgq2A" alt="Image removed by sender." border="0" height="29" width="46"></span></a><u></u><u></u></span></div></td><td colspan="1" rowspan="1" style="width:352.5pt;border:none;padding:9.0pt .75pt .75pt .75pt;" width="705"><div class="yiv9253902285MsoNormal" style="line-height:13.5pt;"><span style="font-size:10.0pt;">Virus-free. <a rel="nofollow" shape="rect" target="_blank" href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link"><span style="color:#4453ea;">www.avast.com</span></a> <u></u><u></u></span></div></td></tr></tbody></table><div class="yiv9253902285MsoNormal"><span style="font-size:12.0pt;"><u></u> <u></u></span></div></div></div></div><br clear="none">______________________________ _________________<br clear="none">
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