Eupithecia unicolor (Hulst)

 - Lateral view of mature larva, on western redcedar
  • Latin name: Eupithecia unicolor (Hulst)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae
Description

Distribution

British Columbia

Micro-habitat(s)

Scale, Needle

Damage, symptoms and biology

Eupithecia unicolor is a common innocuous solitary defoliator.

Mature larva to 20 mm long. Twig mimic. Head, brown with dark mottle. Body, mottled yellowish green, dorsum with faint yellow diamond pattern, dark green middorsal pin stripe.

This species appears to overwinter as a mid-instar larva. Larvae are present April to May. Pupation occurs in June and adults emerge 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
Egg
 
Larva
 
 
Chrysalis
 
Adult
 

Canadian Forest Service Publications

http://cfs.nrcan.gc.ca/publications/recherche?query=&process=Recherche

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)

Rocky Mountain juniper, western redcedar, yellow-cedar

Photos
  • Dorso-lateral view of mature larva, on western redcedar
  • Lateral view of mature larva, on western redcedar
  • Mature (left) and penultimate instar (right) larvae on western redcedar
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