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Photo#163569
Aphids on Asteraceae - Uroleucon obscuricaudatum - female

Aphids on Asteraceae - Uroleucon obscuricaudatum - Female
Pennypack Restoration Trust, Montgomery County, Pennsylvania, USA
July 23, 2006
Identified by Penn State Cooperative Extension of Montgomery County, PA
Southeastern PA.

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Aphids on Asteraceae - Uroleucon obscuricaudatum - female Aphids on Asteraceae - Uroleucon obscuricaudatum - female Aphids on Asteraceae - Uroleucon obscuricaudatum - female

Moved

 
So...
I guess that you can't trust some agricultural extension offices. I had the impression that they didn't care much about a precise ID.
I will start looking for aphids on rag weed from now on.
Thanks to both of you.

Plant host...
...looks to be Oxeye (Heliopsis helianthoides) in Asteraceae.

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