Cochylis nana (Haworth, 1811)

birch conch

on Betula

gall

the larva, a caterpillar, lives during the summer in a female catkin, that may become somewhat disfigured; in autumn pupation follows in a bark fissure.

host plants

Betulaceae, monophagous

Betula pendula, pubescens.

larva

Boy dirty yellowish-white; head brown; prothoracic plate brownish, rear part darkly punctuated; see Swatschek.

synonyms

Acornutia, Conchylis, nana.

references

Bradley, Tremewan & Smith (1973), Buhr (1964a), Disqué (1905a), Hancock & Bland (2015b), Swatschek (1958a).

mod 4.xi.2019