Hemichroa crocea (Geoffroy, 1785)

striped alder sawfly

on Alnus, Betula, Corylus

Hemichroa crocea: oviposition scars on Corylus avellana

Corylus avellana, Zeewolde, Harderbos © 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, mature larvae © 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; Betula pendula; Corylus avellana.

references

Buhr (1964b), Pschorn-Walcher & Altenhofer (2000a), Savina & Chevin (2012a), Sottyk (2002a).

mod 6.xii.2019