Author: (Danilevsky, 1968)
Adult: 14-20 mm wingspan (females usually larger than males); forewing ground colour greyish ochreous-white, strigulated and suffused with dark brown, tips of many scales greyish ochreous-white; basal patch ill-defined; band of ground colour between basal patch and pre-tornal marking relatively narrow (compared to Cydia kurokoi); ocellus containing some black dashes; pre-tornal marking triangular, conspicuous. Hindwing pale greyish-brown.
Larva: ca. 17 mm long when fully grown; head yellowish brown, prothoracic plate pale yellowish brown, with dark spots posteriorly; body yellowish-red when fully grown (colour of earlier instars unknown); pinacula concolorous with integument, indistinct; anal plate pale yellowish brown, occasionally with obscure dark spots.
C. glandicolana male
Cydia glandicolana adult
External characters: 14-19 mm wingspan. Forewing ground colour greyish ochreous-white, strigulated and suffused with dark brown, tips of many scales greyish ochreous-white; costa strigulated with blackish brown, the interspaces greyish ochreous-white, obscured on median part of costa, some giving rise to greyish white strigae. Basal patch ill-defined; ocellus large, containing some black dashes and edged laterally with metallic purplish plumbeous striae; pre-tornal marking triangular, conspicuous. Hindwing pale greyish-brown; cilia pale greyish-brown on outer margin of wing and dark-coloured on inner margin, with special spatulate scales (after Komai and Ishikawa, 1987).
male genitalia C. glandicolana
Genitalia: Valva hardly curved, slightly tapering apically; ventral margin of valva without proper notch, neck with sclerotized ridge. Tegumen rather broad, covered with yellowish brown (easily removed) scales; apex of tegumen with very small projection. Aedeagus G-shaped, without cornuti; distal third of aedeagus with group of small spines.
External characters: Usually larger than males (19-20 mm wingspan); cilia of hindwing without dark coloured spatulate scales.
female gen. Cydia glandicolana
Genitalia: 7th abdominal sternite deeply emarginate caudally. Sterigma long and slender. Antrum weakly sclerotized, connected to cingulum. Corpus bursae with two thorn-like signa. Setae on papilla analis hooked apically.
Cydia glandicolana is an univoltine species. In Far-Eastern Russia, moths fly in July and August; in Japan and Korea in August and September. Larvae feed in the fruits of chestnut and oak. When mature, they crawl out of the injured fruits and make hibernacula in the layer of fallen leaves on the ground, overwintering there in the larval stage (Komai and Ishikawa, 1987).
Castanea mollitissima, Quercus mongolica, Quercus dentata, Quercus serrata
Cydia glandicolana is an important pest of chestnut in China. There are no records of the species feeding on chestnut in Japan and Korea.
China (North East, Huapei, North West, Huantung), Korea, Japan, Russia (Amur)