Poplar Petiolegall Aphid Pemphigus populitransversus Riley ex Riley & Monell, 1879  

There are 3 records in the project database.

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A gall caused by a Poplar Petiolegall Aphid in Anne Arundel Co., Maryland (8/3/2013). Photo by Jim Brighton. (MBP list)

A Poplar Petiolegall Aphid gall in Baltimore City, Maryland (10/30/2007). Verified by Charley Eiseman/BugGuide. Photo by Thomas Wilson. (MBP list)

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