Rabdophaga pierreana (Kieffer, 1909)
on Salix
gall on Salix cinerea, England, Dorset © Jenny Seawright; the two holes probably are exits of parasitoids
opened gal
detail, met parasitoiden
parasitoid
Salix cinerea, Belgium, prov. Namur, Romedenne; leg. Sébastien Carbonnelle © Gilles San Martin
opened gall
Salix appendiculata, Croatia, Velebit National Park, x.2022 © Sébastien Carbonelle
same gall, opened
gall
Strong, almost ovoid swelling at the tip of a young shoot, its outside often almost felty hairy; the wall is thin and fleshy. One, proportionally large, gall chamber with up to 22 red larvae. Against end of May fissures form at the bases of leaves that in the mean time have formed on the galls, enabling the larvae to leave and pupate in he soil. The spatula of the larva is yellow; the widened apical part is divided by a sharp incision in two lobes that are longer than wide.
hostplants
Salicaceae,monophagous
Salix aurita, caprea, cinerea, myrsinifolia.
Perhaps also hastata (Buhr), appendicculata (photo above).
synonyms
Dasineura, Perrisia, pierreana.
references
Barnes (1951a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Gagné (2010a), Gagné & Jaschhof (2014a, Kieffer (1909a), Redfern & Shirley (2011a), Skuhravá & Skuhravý (2003a, 2010a, 2021a: 239), Skuhravá, Skuhravý, Dauphin & Coutin (2005a), Skuhravá, Skuhravý & Hellrigl (2002a), Skuhravá, Skuhravý & Meyer (2014a), Skuhravá, Skuhravý, Skrzypczyńska & Szadziewski (2008a), Stelter (1980a), Tomasi (2014a).