Pristiphora geniculata (Hartig, 1840)

mountain-ash sawfly

on Sorbus

Sorbus aucuparia, Belgium, prov. Limbourg, Ham, Veldhovenheide, 30.vii.2016 © Carina Van Steenwinkel; det. Jorgen Ravoet

Sorbus aucuparia, 19.vii.2015 © Stéphane Claerebout

lateral

frontal

gall

a row of oviposition scars in the serrations along the leaf margin (and not, as Buhr writes, in the midrib of a leaflet?). The larvae live freely on the leaves as gregarious ectophages, capable of causing a local defoliation.

host plants

Rosaceae, monophagous

Sorbus aucuparia.

references

Beneš & Holuša (2015a), Buhr (1965a), Burton, Weiss & Schneider (2019a), Looney, Smith, Collman, ao (2016a), Macek (2012c), Prous, Kramp, Vikberg & Liston (2017a), Pschorn-Walcher & Altenhofer (2000a), Taeger, Altenhofer, Blank, ao (1998a) .