Nepytia umbrosaria nigrovenaria (Packard)

 - Dorso-lateral view of mature larva, on Douglas-fir
  • Latin name: Nepytia umbrosaria nigrovenaria (Packard)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae


British Columbia



Damage, symptoms and biology

This species is a common innocuous solitary defoliator.

Mature larva to 35 mm long. Head, light tan covered with dark spots. Dorsum creamy yellow marked with orange middorsal patches. Rust coloured, dark-margined subdorsal stripe marked with a broken yellow line above a light yellow subspiracular stripe.

This species overwinters as a mid-instar larva. Larvae feed from April to June, pupation occurs in June, adults emerge from late July to early August, mate and lay eggs. The larvae emerge soon after and feed until the weather cools in fall.

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

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)

Amabilis fir, grand fir, Rocky Mountain Douglas-fir, western hemlock

  • Dorso-lateral view of mature larva, on Douglas-fir
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