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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 » Subgenus Uroleucon (Uroleucon Subgenus Uroleucon) » Uroleucon pseudambrosiae
Photo#325149
aphids - Uroleucon pseudambrosiae
Copyright © 2009 Ilona L.

aphids - Uroleucon pseudambrosiae
Cross Plains, Dane County, Wisconsin, USA
August 13, 2009

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aphids - Uroleucon pseudambrosiae aphids - Uroleucon pseudambrosiae
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Contributed by Ilona L. on 25 August, 2009 - 8:50pm
Last updated 16 December, 2010 - 5:29pm

Host plant ID
I think the plant in this photo is one of the "lettuce look-alikes", but is not actually Wild lettuce (Lactuca canadensis). Instead, I think it is Common Sow-thistle (Sonchus oleraceus); note the spined, clasping leaf base. Note also the slightly flattened and grooved stem (along where most of the aphids are located).
… John Pearson, 22 November, 2009 - 5:08pm login or register to post comments

 
Correction
Upon further perusal of manuals, I see that the groove in the stem is too wide for that of Sonchus. So it goes back to Lactuca, but is a spiny species such as the Sonchus-like L. scariola instead of the spineless L. canadensis.
… John Pearson, 23 November, 2009 - 10:47pm login or register to post comments

Moved
Moved from Aphids.
… Charley Eiseman, 13 October, 2009 - 10:41pm login or register to post comments

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