Rhagoletis completa Cresson, 1929

walnut husk fly

on Juglans

Juglans regia, Hungary, Mosonmagyaróvár © László Érsek

larvae in the husk

another image

larvae

larva

gall

larvae bore in the pericarp (the husk); the fruits are disfigured and discoloured.

hostplants

Juglandaceae, monophagous

Juglans nigra, regia.

notes

invasive species, originating from North America, now invading Europe from a starting point in Switzerland.

references

Duso & dal Lago (2006a), Korneyev, Mishustin & Korneyev (2017a), Mani, Merz & Brunett (1994a), Smit (2020a), Smit & Schaareman (2015a), Stalažs & Balalaikins (2017a).