Eupithecia subfuscata (Haworth)

  • Latin name: Eupithecia subfuscata (Haworth)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae
  • Synonym(s): Eupithecia castigata Hübner



This holarctic species is generally distributed throughout British Columbia south of 560latitude; it also occurs east to Newfoundland, south to New Mexico, and in Eurasia.



Damage, symptoms and biology

Eupithecia subfuscata is a relatively uncommon innocuous solitary defoliator.

Mature larva up to 16 mm long. Body colour highly variable from light brown to dark brown, dorsum marked with dark brown wishbone pattern; body covered with very small greyish white pinnacula.

This species overwinters in the pupal stage. Adults emerge from May to July; larvae are present from late June to September, and pupation occurs in September.

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)

Coniferous hosts of the Eupithecia subfuscata include Douglas-fir, Sitka spruce and lodgepole pine; hardwood hosts include willow, alder, birch, poplar and Garry oak.

Main host(s)

, Alaska paper birch, alders, balsam poplar, balsam willow, Bebb willow, birch, black cottonwood, black willow, blueleaf birch, Carolina poplar, cherry birch, Douglas-fir, dwarf birch, eastern cottonwood, European black alder, European black poplar, European white birch, European white poplar, feltleaf willow, Garry oak, golden weeping willow, green alder, grey birch, hazel alder, heartleaf willow, hooker willow, hybrid poplar, hybrid white willow, Jack’s hybrid poplar, Kenai birch, lanceleaf cottonwood, largetooth aspen, laurel willow, littletree willow, lodgepole pine, Lombardy poplar, low birch, Mackenzie willow, meadow willow, mountain alder, mountain paper birch, narrowleaf cottonwood, Pacific willow, peachleaf willow, plains cottonwood, plains cottonwood, poplars / aspens / cottonwoods, pussy willow, red alder, sandbar willow, satiny willow, Scouler willow, shining willow, Siberian alder, Sitka alder, Sitka spruce, Sitka willow, speckled alder, trembling aspen, violet willow, water birch, white birch, white birch, willow, yellow birch

  • Adulte at rest
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