Thera otisi (Dyar)

 - Dorso-lateral view of a mature larva, on common juniper
  • Latin name: Thera otisi (Dyar)
  • French name:
  • Order: Lepidoptera
  • Family: Geometridae
Description

Distribution

British Columbia, Alberta

Micro-habitat(s)

Needle

Damage, symptoms and biology

Thera otisi is a rather uncommon innocuous solitary defoliator.

Mature larva up to 16 mm long. Head, yellowish green, held under thorax. Body, green; yellowish subdorsal stripes; spiracular stripe red above and white below.

This species appears to overwinter in the egg stage. Larvae are present June to July, pupation occurs in July, and adults emerge July to August.

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)

Juniper, Rocky Mountain juniper

Photos
  • Dorso-lateral view of a mature larva, on common juniper
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