<div dir="ltr">Wow, impressive aphid infestation! This is probably the cabbage aphid, Brevicoryne brassicae, which has that grayish waxy covering <div>and feeds on a lot of different plant species in the Brassicaceae. It also has a common parasitoid that would produce aphid mummies as observed by</div><div>Deborah Barber.</div><div><a href="http://entnemdept.ufl.edu/creatures/veg/aphid/cabbage_aphid.htm">http://entnemdept.ufl.edu/creatures/veg/aphid/cabbage_aphid.htm</a> </div><div><br></div><div>Judy Hough-Goldstein <br></div><div>Professor Emeritus, Entomology, Univ. Delaware</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 5, 2020 at 3:56 PM Ross Campbell <<a href="mailto:rosscampbell728@gmail.com">rosscampbell728@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 4, 2020 at 8:34 PM Ross Campbell <<a href="mailto:rosscampbell728@gmail.com" target="_blank">rosscampbell728@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div dir="auto">I took these pics today in Silver Spring MD near Sligo Creek Park. This is second or third time I have seen what I assume to be aphids on GM this spring.</div></div><div><div><img src="cid:17281e4e8abf547d95e3" style="width: 667px; max-width: 100%;"></div><div><img src="cid:17281e50a4daa9db45d4" style="width: 667px; max-width: 100%;"></div></div><div><div dir="auto"><br></div><div dir="auto">Ross Campbell</div><div dir="auto">Montgomery County Weed Warrior</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 4, 2020 at 12:46 PM Deborah Barber <<a href="mailto:DBarber@tnc.org" target="_blank">DBarber@tnc.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal">Do these have legs? Can they be knocked off, or do they appear to be part of the plant (which would suggest a gall)? These remind me (color,size, shape) of what I’ve been seeing that I think are aphid mummies.
<a href="https://extension.umd.edu/hgic/topics/aphid-parasitoids" target="_blank">https://extension.umd.edu/hgic/topics/aphid-parasitoids</a> The ones I saw in April seemed to still be occupied but recent ones are broken and hollow, suggesting the wasps have emerged. I’ve
suggested aphidius on several <a href="https://www.inaturalist.org/observations?place_id=any&subview=table&taxon_id=250247" target="_blank">
iNaturalist observations</a> I’ve made but people are not exactly lining up to confirm any aphidius ID’s. Also…I’ve never noticed aphids on the undersides of garlic mustard leaves?<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12pt"><b><span style="font-size:10pt;font-family:"Whitney Office"">Deborah Barber</span></b><i><span style="font-size:10pt;font-family:"Whitney Office""><br>
Director of Land Management <br>
</span></i><span style="font-size:10pt;font-family:"Whitney Office""><a href="mailto:dbarber@tnc.org" target="_blank"><span style="color:blue">dbarber@tnc.org</span></a><i><span style="color:rgb(103,103,103)"><br>
</span></i>240.630.7042 (Phone)<i><br>
</i><a href="http://nature.org/MarylandDC" target="_blank"><span style="color:blue">nature.org/MarylandDC</span></a><u></u><u></u></span></p>
</td><td><a href="https://www.google.com/maps/search/425+Barlow+Place+%0D%0A+Suite+100+%0D%0A+Bethesda,+MD+20814?entry=gmail&source=g" target="_blank">
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<p class="MsoNormal"><b><span style="font-size:10pt;font-family:"Whitney Office";color:black"> The Nature Conservancy</span></b><span style="font-size:10pt;font-family:Cambria,serif;color:black"> </span><span style="font-size:10pt;font-family:"Whitney Office";color:black">
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<b> Maryland/DC Chapter</b></span><span style="font-size:10pt;font-family:"Whitney Office";color:black"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Whitney Office";color:black"> <a href="https://www.google.com/maps/search/425+Barlow+Place+%0D%0A+Suite+100+%0D%0A+Bethesda,+MD+20814?entry=gmail&source=g" target="_blank">425 Barlow Place</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Whitney Office";color:black"> <a href="https://www.google.com/maps/search/425+Barlow+Place+%0D%0A+Suite+100+%0D%0A+Bethesda,+MD+20814?entry=gmail&source=g" target="_blank">Suite 100</a><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Whitney Office";color:black"> <a href="https://www.google.com/maps/search/425+Barlow+Place+%0D%0A+Suite+100+%0D%0A+Bethesda,+MD+20814?entry=gmail&source=g" target="_blank">Bethesda, MD 20814</a><u></u><u></u></span></p>
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<p class="MsoNormal"><i><span lang="EN-GB" style="font-size:10.5pt;color:rgb(31,73,125)">At TNC we work flexibly, so while it suits me to email now, I don’t anticipate a response outside your normal hours.</span></i><span style="font-size:10.5pt;font-family:Arial,sans-serif"><u></u><u></u></span></p>
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<p class="MsoNormal"><b>From:</b> MAIPC <<a href="mailto:maipc-bounces@lists.maipc.org" target="_blank">maipc-bounces@lists.maipc.org</a>> <b>On Behalf Of
</b>MARGARET L CHATHAM<br>
<b>Sent:</b> Thursday, June 04, 2020 12:18 PM<br>
<b>To:</b> <a href="mailto:MAIPC@lists.maipc.org" target="_blank">MAIPC@lists.maipc.org</a><br>
<b>Subject:</b> [MAIPC] Can anyone tell me who this is?<u></u><u></u></p>
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<p class="MsoNormal">Found these on a number of garlic mustard leaves and siliques. The leaves showed no damage on the upper surfaces. I couldn’t see any exit holes on many of these, but they were crushable and appeared unoccupied.<u></u><u></u></p>
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<p class="MsoNormal">Thanks for any info.<u></u><u></u></p>
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<p class="MsoNormal">Margaret<u></u><u></u></p>
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