Authors: L. Meijerman & S.A. Ulenberg (Zoological Museum, University of Amsterdam)
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Scientific name:

Cydia cosmophorana

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Cydia amplana - Rusty oak moth
Cydia duplicana

Author: (Treitschke, 1835)

Species Overview:

Adult: 9-13 mm wingspan; forewing with distinct white interspaces between the costal strigulae and with narrow but conspicuous transverse band of whitish ground colour on each side of the median fascia; hindwing fuscous, paler basally.
Egg: deposited in a crevice of the bark of the food plant.
Larva: head and prothoracic plate brown; abdomen greenish yellow; pinacula concolorous with integument, inconspicuous; anal plate small, weakly sclerotized.
Pupa: brown, without spines; in the larval habitation.

Taxonomic Description:

Male:

Cydia cosmophorana adult 1
Cydia cosmophorana adult 2
External characters: 9-13 mm wingspan. Forewing ground colour white, reduced to four or five distinct interspaces between evenly spaced, obscure, blackish brown costal strigulae, some of the interspaces producing short, metallic purplish or bluish plumbeous striae, and as slender antemedian and postmedian transverse bands variably overlaid with metallic bluish plumbeous; distal area overlaid with brown and irrorate (tips of scales) with pale ochreous, the irroration forming striola; fasciate markings grey-brown to black-brown; basal and sub-basal fasciae forming a large basal patch, somewhat darker distally, its outer edge sharply defined and obtusely angulated above middle; median fascia broad, irrorate with pale yellow, sharply defined, slightly outward-oblique from costa, its inner edge concave above middle; ocellus subtriangular, extending to tornus, yellow-ochreous, containing four or five long black dashes and edged laterally with metallic bluish plumbeous striae; cilia concolorous with wing basally, otherwise grey, with a black sub-basal line interrupted subapically by a cream-white dash. Hindwing fuscous, paler basally; cilia greyish white, with a fuscous sub-basal line (Bradley et al., 1979).

male gen. Cydia cosmophorana
Genitalia: Sacculus with angular protuberance under basal opening. Cucullus elongated, its ventral angle glabrous. Notch in ventral margin of valva broad but relatively shallow. Aedeagus fairly broad, with two groups of cornuti that are distinctly different in size.

Female:

External characters: Similar to male.

female gen. C. cosmophorana
Genitalia: Median field of 7th sternite demarcated from lateral regions by poorly sclerotized grooves, elongated posterior angles fused with lamella postvaginalis; posterior margin of lamella postvaginalis with angulated corners, anterior margin rounded. Ductus bursae short, sclerotized.

Biology:

Females deposit their eggs in a crevice of the bark of the food plant. The larva occur from September to April, living in resinous nodules and excrescences on the bark of the trunk and branches and also in one-year-old galls of Retinia resinella and old galls of the pyralid Dioryctria abietella (Denis and Schiffermüller). They also live in young pine stems, perhaps in the old mines of Blastesthia posticana. Pupation takes place in the larval habitation, in April and May. Moths fly in May and June, and a small second generation can occur in August. They frequent pine forests and plantations and are most active in hot sunshine at midday and in the afternoon.

Host plants:

Pinus sylvestris; also on Pinus strobus, Picea excelsa, Juniperus communis.

Damage:

The larvae live in resinous nodules and excrescences on the bark of the trunk and branches of the host plant, and also in galls and mines of other, more economically important, tortricid and pyralid species. This species itself does not appear to be of much economic importance.

Distribution:

Northern and Central Europe to Eastern Russia.

Pheromone:

Pheromone unknown.

Attractantia:

E 8-12Ac : 1
E 10-12Ac : 1 (Booij and Voerman, 1984a)

or

E 8-12Ac : 9
E 10-12Ac : 1 (Booij et al., 1986)



Cydia cognatana (Barrett)
Cydia coniferana (Saxesen)
Cydia indivisa (Danilevsky)

Cydia cognatana adults
Cydia coniferana adult 1 ; Cydia coniferana adult 2
Cydia indivisa adult

Three other Cydia species feeding in the bark of conifers that are not included in the key are Cydia cognatana (Barrett) (Pinus ; Central and Northern Europe to Western Russia), Cydia coniferana (Saxesen) (Pinus, Picea, Abies ; Western Europe to Eastern Russia and Mongolia) and Cydia indivisa (Danilevsky) (Abies, Picea, Pinus, Larix ; Western Europe to the southern part of Eastern Russia).

In Cydia cosmophorana, the median fascia is edged by conspicuous bands of the white ground colour, the posterior band being straight. In the three other species, the posterior band is not straight, and the anterior band is broken medially into a medio-dorsal blotch and a medio-costal blotch.
In Cydia indivisa, the medio-dorsal blotch is not divided by a fine brown stria as it is in the two other species. Cydia cognatana can be distinguished from Cydia coniferana by the slightly broader, more strongly falcate medio-dorsal blotch and the comparatively distinct, widely spaced, white costal interspaces.

Genitalia:

male gen. Cydia indivisa ; female gen. Cydia indivisa
male genitalia C. cognatana ; female genitalia C. cognatana
male genitalia C. coniferana ; female genitalia C. coniferana
Male genitalia can be distinguished by the shape of the valva and aedeagus; female genitalia by the shape of the postvaginal plate and the size and sclerotization of the ductus bursae.

Cydia cosmophorana
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Cydia cosmophorana
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