Hemichroa crocea (Geoffroy, 1785)

striped alder sawfly

on Alnus, Betula, Corylus

Hemichroa crocea: larva on Alnus glutinosa

Alnus glutinosa, Belgium, prov. Namur, Viroinval, Nismes, RN Sous Saint-Roch, 11.x.2016 © Stéphane Claerebout

Hemichroa crocea: oviposition scars on Corylus avellana

Corylus avellana, Zeewolde, Harderbos, 19.ix.2017 © Hans Jonkman: a double row of oviposition scars on the midrib

Hemichroa crocea: young larvae

jonge larven

Hemichroa crocea: young larvae, feeding pattern

feeding pattern of the young larvae

Hemichroa crocea: mature larvae

Corylus avellana, Dronten, Roggebotbos, larvae, 14.ix.2016 © Hans Jonkman, det Leo Blommers

parasiet

Oviposition scars in a double row on the underside of the midrib (rarely a thick lateral vein or the petiole). The later larvae live freely on the leaf, feedings dispersed large chunks.

host plants

Betulaceae, oligophagous

Alnus glutinosa, incana, viridis; Betula pendula; Corylus avellana.

references

Buhr (1964b), Hoop (1983a), Pschorn-Walcher & Altenhofer (2000a), Savina & Chevin (2012a), Schedl (1976a, 2003a), Sottyk (2002a), Stritt (1939b, 1952a), Taeger, Altenhofer, Blank, ao (1998a).