Enypia venata (Grote)

 - Lateral view of mature larva (rust morph), on western redcedar
  • Latin name: Enypia venata (Grote)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae
Description

Distribution

British Columbia, Alberta

Micro-habitat(s)

Needle, Scale

Damage, symptoms and biology

Enypia venata is a common innocuous solitary defoliator.

Mature larva to 32 mm long. Head, light brown with darker mottling. Body, rusty brown; dorsum marked with yellowish patches and dark middorsal Y markings at the posterior margin of each segment; discontinuous blackish addorsal and subdorsal lines; broad creamy yellow spiracular stripe bounded by a broken dark supraspiracular line.

This species overwinters as a fourth- or fifth-instar larva. Feeding resumes in the spring and continues until late June. Pupation occurs June to July and adults emerge 16 to 38 days later and lay eggs. Larvae emerge soon after and feed until the onset of cooler weather.

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
Egg
 
Larva
 
 
Chrysalis
 
Adult
 

Canadian Forest Service Publications

http://cfs.nrcan.gc.ca/publications/search?query&process=Search

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, Engelmann spruce, grand fir, mountain hemlock, Rocky Mountain Douglas-fir, Sitka spruce, subalpine fir, western hemlock, western redcedar, western white pine, white spruce

Photos
  • Lateral view of mature larva (rust morph), on western redcedar
  • Dorso-lateral view of mature larva (rust morph), on western redcedar
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