Aproceros leucopoda Takeuchi, 1939

zigzag elm sawfly

on Ulmus

Ulmus spec., Hungary, Halászi, 13.v.2019 © László Érsek: feeding pattern

young larva, feeding

head and thorax, lateral view

cocoon

detail

larva, dissected out of the cocoon above

27.vii.2019, feeding pattern

Ulmus spec. © Tineke Cramer, Leersum: feeding pattern (from Mol & Vonk).

Ulmus spec., Biddinghuizen, Spijk- en Bremerbergbos 3.ix.2018 © Hans Jonkman: ovipositing female

“gall”

gall

Like in more sawflies the eggs are deposited one by one in the very leaf margin. The tiny eg pocket that results makes one think of a small gall.

host plants

Ulmaceae, monophagous

Ulmus daviana, glabra, x hollandica, laevis, minor, pumila.

phenology

Up to four generations per year.

pupa

pupation in a reticulate cocoon

old cocoons © Hans Jonkman

notes

East Asian species, recorded in Europe for the first time in 2003. Since then the species has expanded its range to a large part of the continent, assisted by the relatively large number of annual generations and by the fact that the species reproduces parthenogenetically. The damage to the host plants can be considerable.

references

Blank, Hara, Mikulás ao (2010a), Burton, Weiss & Schneider (2019a), Gyurkovics & Haris (2012a), Haris (2018a), Mol & Vonk (2015a), Seljak (2012a), Sobczyk & Nuss (2013a), Vétek, Bartha & Oláh (2017a), Zúbrik, Galkom, Gubk ao (2016a).