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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera) » Plant-parasitic Hemipterans (Sternorrhyncha) » Aphidoidea » Aphids (Aphididae) » Aphidinae » Macrosiphini » Uroleucon

Photo#464220

Copyright © 2010 Nancy Kent

Aphids - Uroleucon

Radford, Virginia, USA
October 11, 2010

Are these nymphs? They were on a Tall Rattlesnake Root stem.

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Contributed by Nancy Kent on 12 October, 2010 - 5:18am
Last updated 14 March, 2011 - 8:50pm

Moved

Moved from Aphids.

… Charley Eiseman, 17 December, 2010 - 5:28pm

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ID

These are Uroleucon.

… Andrew Jensen, 17 December, 2010 - 5:13pm

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Thank you..

Thank you, Andrew.

… Nancy Kent, 17 December, 2010 - 8:50pm

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Tall Rattlesnake Root

To help reviewers look up aphids by host plant, Tall Rattlesnake Root is Prenanthes altissima in the Aster family (Asteraceae).

… John Pearson, 13 October, 2010 - 12:20pm

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Moved

Moved from ID Request.

Aphids--adults and young. The cornicles ("tailpipes") are a dead giveaway. With the host plant identified, further ID may be possible (although not guaranteed).

… Ken Wolgemuth, 12 October, 2010 - 5:53am

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Aphids

Thanks so very much, Ken. I need a few lessons in recognizing the difference between nymphs and aphids! All aphids have cornicles is my first fact to remember, right?

… Nancy Kent, 12 October, 2010 - 6:24am

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According to the Guide,

"Aphids may be identified by two tubelike projections on the posterior, called cornicles or siphunculi. These appear to function as a means of chemical defense, emitting pheromones to alert other aphids about a predator nearby. They also offer mechanical protection, as the fluid emitted can gum up the mouthparts of the predators."

I'll point out, though, that the cornicles are not always as obvious as they are in this species (whatever it is).

… Ken Wolgemuth, 12 October, 2010 - 6:57am

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Thanks!

Thanks, Ken. I still do not navigate around BugGuide with ease except to upload requests! I'm learning a lot of info about critters that I find with my digital cam and am trying to avoid mental overload. I appreciate your taking time to find info for me.

… Nancy Kent, 12 October, 2010 - 7:06am

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