Sorbus torminalis, Hungary, Budapest – Hűvösvölgy © László Érsek; April 13

detail upperside

detail underside

same tree, May 8

upperside

underside

same tree, June 27

underside

Sorbus torminalis, Belgium, Prov. Namur, Rochefort, Tienne de Boton © Carina Van Steenwinkel

same leaf, underside

gall

numerous, yellowish-green, amphigenous pustules; they are hollow and contain a number of mites.

host plants

Rosaceae, narrowly monophagous

Sorbus torminalis.

references

Bellmann (2012a), Lambinon Schneider & Feitz (2012a), Redfern & Shirley (2011a), Ripka (2007a, 2010a, 2011b).