<div dir="ltr">All,<br><br>I have been sampling for arthropods associated with communities of non-native plants, including Japanese stiltgrass, in landscapes throughout the Mid-Atlantic region. So far, I have not encountered any herbivores feeding on the grass; any plant-feeding arthropod I did collect were species that fed on trees in the canopy. However, I have found trace amounts (so far, 2 leaves) of damage caused by leaf-mining flies (Family Agromyzidae) from sites in Queen Anne's County, MD, so it is possible that Japanese stiltgrass is being recognized as a plant host by some of our native herbivores. I'll have more information as I sort through this year's data. <div><br></div><div>That being said, the sheer amount of stiltgrass in these landscapes not being infected by leaf-mining flies would suggest to me that this kind of feeding may not be advantageous for the herbivores, so we may not want to jump to conclusions just yet. The areas where I did sample for arthropods associated with Japanese Stiltgrass were near native grass communities, and it is possible that leaf-mining flies selected a poor quality host in comparison to a warm-season perennial.There might also be timing issues with sampling for the leaf miners (i.e., BugGuide records of leafminers on living Microstegium tissues occurred in May, whereas the plant is more aggressive later in the summer). But, let's keep an eye out for leaf damage where we know the plants are dominant. </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Oct 9, 2016 at 8:45 AM, Imlay, Marc <span dir="ltr"><<a href="mailto:Marc.Imlay@pgparks.com" target="_blank">Marc.Imlay@pgparks.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><a href="http://bugguide.net/node/view/1266819/bgpage" target="_blank">http://bugguide.net/node/view/<wbr>1266819/bgpage</a><u></u><u></u></p>
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<p class="MsoNormal">Marc Imlay, PhD, Chair, Biological Control Working Group <u></u>
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<p class="MsoNormal">Conservation Biologist, Park Ranger Office, Non-native Invasive Plant Control Coordinator.
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<p class="MsoNormal">Cell: <a href="tel:%28301%29%20442-5657" value="+13014425657" target="_blank">(301) 442-5657</a>, <a href="http://ialm@erols.com" target="_blank">ialm@erols.com</a><u></u><u></u></p>
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<a href="http://bugguide.net/node/view/3/bgpage" title="Phylum" target="_blank"><span style="color:#000099">Arthropods (Arthropoda)</span></a> »
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<a href="http://bugguide.net/node/view/46142/bgpage" title="No Taxon" target="_blank"><span style="color:#000099">Unidentified Leaf Mines</span></a><u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Times New Roman","serif"">Photo#1266819<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><img border="0" width="263" height="560" src="cid:image001.jpg@01D22209.BE120DF0" alt="Durham Pelham road leaf miner maybe on Microstegium vimineum D291 2016 2"></span><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><u></u><u></u></span></p>
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<a href="http://bugguide.net/user/view/105887" title="View user profile." target="_blank"><span style="color:#000099">tracysfeldman</span></a><u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Durham Pelham road leaf miner maybe on Microstegium vimineum D291 2016 2<u></u><u></u></span></b></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Durham, Durham County, North Carolina, USA<br>
July 27, 2016<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Not sure if this is a miner, yet it looks like it could be. Nothing is in the mine, if it is a mine.
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Times New Roman","serif";color:#555555">Contributed by
<a href="http://bugguide.net/user/view/105887" title="View user profile." target="_blank"><span style="color:#000099">tracysfeldman</span></a> on 29 July, 2016 - 8:15pm<u></u><u></u></span></p>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>--------------------------------------------<br>Adam Mitchell<br>Associate Wildlife Biologist ®<br>PhD Candidate<br>Department of Entomology <br>and Wildlife Ecology<br>University of Delaware <br></div></div></div>
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