Hemichroa crocea (Geoffroy, 1785)striped alder sawfly
on Alnus, Betula, Corylus
striped alder sawfly
on Alnus, Betula, Corylus
Alnus glutinosa, Belgium, prov. Namur, Viroinval, Nismes, RN Sous Saint-Roch, 11.x.2016 © Stéphane Claerebout
Corylus avellana, Zeewolde, Harderbos, 19.ix.2017 © Hans Jonkman: a double row of oviposition scars on the midrib
jonge larven
feeding pattern of the young 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).