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Bark borer beetle / Waney Edge Borer - Ernobius Mollis

Timbers attacked

Partly or fully seasoned softwoods with bark present.

Damage

Confined to the bark with very superficial tunnelling in the outer sapwood; emergence holes rarely further than 15mm from barked area. Holes about 2mm in diameter. Bore dust 'gritty' feel; small 'bun-shaped' light and dark coloured pellets.

Life cycle (1 - 2 years)

i. Adult : Emerge May - August and lay eggs.
ii. Eggs: Laid in bark; white, lemon shaped.
iii. Larva: Bores and grows first in bark; may also superficially attack outer sapwood and this gives rise to the dark and light
coloured pellets.
iv. Pupa: Develops in bark/sapwood interface 10 days before emergence.

Notes

Damage is mistaken for Common Furniture Beetle damage. Waney Edge Borer must have bark present.

Quick Identification

Bark present; bun-shaped pellets in bore dust which are dark and light in colour. Holes in bark or close sapwood.