Seq # 362910070

Cydia grunertiana (Ratzeburg, 1868) Species

Last modified: May 12, 2022, 11:01 a.m.

First observation of this very rare species in Belgium was in AN (2003). Afterwards rarely seen. Can be confused with Cydia pactolana, therefore study of the genitals is recommended, although habitat (and food plant) are a guide to species recognition.


Family: Tortricidae > Subfamily: Olethreutinae > Tribus: Grapholitini > Genus: Cydia > Species: Cydia grunertiana
Vernacular names
Roetzwarte spiegelmot (NL), Lärchenbastwickler (DE)
First mention in Belgium
Groenen F. & De Prins W. 2004. Cydia grunertiana, nieuw voor de Belgische fauna (Lepidoptera: Tortricidae). — Phegea 32(3): 113–115. On page 113.




Wingspan 12,5–16 mm. In external characteristics, this species differs in its more black-gray color and more compact shape than Cydia pactolana. On the underside of the rear wing, a lighter spot is present in Cydia pactolana, which is missing in C. grunertiana.

Museum specimens

Specimens in nature

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The female lays the eggs on the trunks of 15–30 year old Larix sp. The caterpillar lives under the bark and hibernates at a young stage. Pupation takes place in May in the larval habitation.

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Flight periods

The adults have been observed from mid-May till July. The late date of the first Belgian specimen is possibly due to an extremely warm summer.

Observed on

Host plant (genera):

The larva lives under the bark of Larix.

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