[MAIPC] Can anyone tell me who this is?

[Deborah Barber]

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. https://extension.umd.edu/hgic/topics/aphid-parasitoids  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 iNaturalist observations<https://www.inaturalist.org/observations?place_id=any&subview=table&taxon_id=250247> 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?

Deborah Barber
Director of Land Management
dbarber at tnc.org<mailto:dbarber at tnc.org>
240.630.7042 (Phone)
nature.org/MarylandDC
               The Nature Conservancy
               Maryland/DC Chapter
               425 Barlow Place
               Suite 100
               Bethesda, MD 20814

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At TNC we work flexibly, so while it suits me to email now, I don’t anticipate a response outside your normal hours.


From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of MARGARET L CHATHAM
Sent: Thursday, June 04, 2020 12:18 PM
To: MAIPC at lists.maipc.org
Subject: [MAIPC] Can anyone tell me who this is?

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.
Thanks for any info.
Margaret

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