Dark Spruce Knot-horn

Assara terebrella (Zincken, 1818)

A medium-sized moth, with the forewing black-brown with white crosslines and a whitish blotch extending into the middle of the wings. This whitish blotch contains two black dots.

Identification

A medium-sized moth, with the forewing black-brown with white crosslines and a whitish blotch extending into the middle of the wings. This whitish blotch contains two black dots.

ORDER

Lepidoptera

FAMILY

Pyralidae

TYPE

Moths

In Britain thinly spread in southern England and Wales, occurring in spruce plantations. In Dorset and Somerset, Assara terebrella is a rare moth, occurring only at a few sites, where Wyke Farm is one of the strongholds for this species. This species is regular and locally common at Wyke Farm.

This species is generally restricted to Spruce woodlands, though occasionally is recorded in gardens.

The larvae feed within the cones of Norway Spruce. Their presence in cones causes cone development to be inhibited, and cause the cone to fall prematurely.

Adults fly from late May to early October, but peak June to August, where they can be attracted to light.

The larvae can be found during the autumn and winter by collecting fallen cones, though many cones may be uninhabited, those occupied often appear blackish when they are wet.

MONTHS - SEASONALITY
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
LATIN NAME

Assara terebrella

Size (MM)

Wingspan 22-25 mm

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