BioImages: The Virtual Field-Guide (UK)
Pemphigus (Pemphigus) spyrothecae Passerini, 1860 (Spiral Gall Aphid)
||2 August 2007
|OS grid ref:
||51° 20' N, 1° 20' W
||Vice County: Berks, VC22, England
|Stage or state:
||Spiral galls on petioles of Lombardy Poplar
||on live petiole of Populus nigra 'Italica'
||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.