Arge pagana (Panzer, 1798)

on Rosa

Rosa spec., UK, Norfolk, Downham Market. 15.vii.2022 © Rob Edmunds

Rosa canina, Hungary, Jánossomorja, 17.vi.2018 © László Érsek: young larvae

Rosa canina, Hungary, Kimle, 4.ix.2017 © László Érsek: fully grown larva

another image

Rosa canina, Hungary, Budapest, Kamaraerdő, 26.v.2021 © László Érsek: ovipositing female

detail

from above

fresh oviposition scar

transverse section: two egg chambers

detail

length section through one of the egg chambers

egg

gall

eggs are deposited in two length rows in a young shoot. As the shoot becomes older and thicker, an elliptic scar remains. Larvae free on the leaves.

host plants

Rosaceae, monophagous

Rosa canina, majalis, multiflora.

notes

The larvae of A. pagana and A. ochropus are quite similar, en aften occur together. Often, pagana larvae have an undivided black spot on the abdominal segment, while in ochropus this spot is divided in two. A fully reliable difference, according to Chevin, is that in pagana the black dots of the abdominal segments, seen from above, are arranged in neat length rows, while in ochropus they form much more untidy rows.

references

Benson (1961a), Buhr (1965a), Burggraaf-van Nierop & van Achterberg (1990a), Chevin (1972a), Gyurkovics & Haris (2012a), Haris (2009a, 2012a), Hoop (1983a), Kofler & Schedl (2010a), Macek (2012c), Pschorn-Walcher & Altenhofer (2000a), Savina & Chevin (2012a), Schwarz (2004a), Taeger, Altenhofer, Blank, ao (1998a), Vicidomini & Russo (2007a), Zhao & Hua (2016a).