Seq # 362920130

Dichrorampha sequana (Hübner, 1799) Species

Last modified: May 24, 2024, 3:40 p.m.


A very rare and local species in Belgium, not seen for a very long time. Presumably extinct.


Details

Classification
Family: Tortricidae > Subfamily: Olethreutinae > Tribus: Grapholitini > Genus: Dichrorampha > Species: Dichrorampha sequana
Vernacular names
Gezadelde wortelmot (NL), Square-spot Drill, White-spot Yarrow Moth (EN)
First mention in Belgium
Lambillion L.-J. 1904e. Lépidoptères nouveaux pour la Belgique. — Revue mensuelle de la Société entomologique namuroise 4: 67. On page 67.
Status

Native


Distribution


Imago

Wingspan 9–11 mm. A small Dichrorampha species recognized by the conspicuous, broadly, cream-white rectangular medio-dorsal blotch of the forewing and white basal striae. It also has prominent white costal strigulae and black dots near termen. The male has a costal fold to one half.

Museum specimens

No pictures yet!

Specimens in nature

No pictures yet!

Caterpillar

Body whitish, head light brown, laterally darkened, prothoracic plate light brown.

No pictures yet!

Bionomics

The larva bores and feeds in the roots and rootstock of the food plant, with no noticeable effect on plant growth.
It pupates in a cocoon in the ground or on the host plant. It flies in afternoon sunshine and towards dusk and later come to light.

No pictures yet!

Flight periods

The adults are on the wing during May and June.


Observed on

Host plant (species):
Achillea millefolium and Tanacetum vulgare

The larva lives on Achillea millefolium and Tanacetum vulgare. Whether Leucanthemum vulgare is used as a food plant is still unclear.

No pictures yet!

Habitat

It inhabits wasteland, embankments, flowery grasslands, herb-rich roadsides and pastures.

No pictures yet!