BioImages: The Virtual Field-Guide (UK)

Pemphigus (Pemphigus) spyrothecae Passerini, 1860 (Spiral Gall Aphid)

Date: 2 August 2007
OS grid ref: SU46
Lat/Lon: 51° 20' N, 1° 20' W
Location: Vice County: Berks, VC22, England
Stage or state: Alate
Record Summary: Spiral galls on petioles of Lombardy Poplar
Associated organism: on live petiole of Populus nigra 'Italica'
Identification Notes: Petiole spirally swollen with 1 twist (ie single crack opens up when slightly and very gently uncoiled) with thickened surface inside gall.

Galls can be unwound: filled with white waxy globules and small grey aphids with dense tuft of wax filaments from end of abdomen, plus a few alates.

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