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Egira simplex (Walker)

 - Dorso-lateral view of mature larva, on Sitka spruce
  • Latin name: Egira simplex (Walker)
  • French name:
  • Order: Lepidoptera
  • Family: Noctuidae


British Columbia


Needle, Bud, Annual shoot

Damage, symptoms and biology

Egira simplex is not frequently encountered on coniferous hosts, it does however occasionally occur on conifers in destructive numbers.

Mature larva to 30 mm long. Head, black unmarked. Body, brown with faint white mottling; distinct paired black addorsal spots; middorsal and subdorsal white lines; broad orange-brown spiracular stripe.

Overwinters as a pupa buried in the duff. Adults emerge April to May. Larvae feed initially in the opening buds, then on the new foliage from May to mid-July. Pupation occurs in July.

Life cycle (West of the Rockies)

Life cycle (West of the Rockies)
Stage/Month J F M A M J J A S O N D

Other information

A localized outbreak was recorded on Sitka spruce near Tofino in 1995.

Canadian Forest Service Publications

Diet and feeding behaviour

  • Phyllophagous : Feeds on the leaves of plants.
    • Free-living defoliator: Feeds on and moves about freely on foliage.
Information on host(s)

Main host(s)

Grand fir, red alder, Rocky Mountain Douglas-fir, Sitka spruce


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