[MAIPC] Can anyone tell me who this is?

[MARGARET L CHATHAM]

There were aphids on garlic mustard elsewhere at Fraser Preserve earlier in the season, & they caused noticeable damage to the plants. I even saw some with ants tending them. These do not appear to be part of the plant, but very firmly attached (barnacles come to mind). Closer examination of the original photo pushes the boundaries of what can be seen, but maybe there are some legs there. I didn’t know aphids mummified. Thanks!

Margaret

> On Jun 4, 2020, at 12:46 PM, Deborah Barber <DBarber at TNC.ORG> wrote:
> 
> 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 <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 <x-msg://4/nature.org/MarylandDC>		
>                The Nature Conservancy     
>                Maryland/DC Chapter
>                425 Barlow Place
>                Suite 100
>                Bethesda, MD 20814
>      
> <image004.png>
>  
> 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
>  
> <image003.jpg>

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