Digrammia setonana (McDunnough)

Latin name: Digrammia setonana (McDunnough)
French name:
Order: Lepidoptera
Family: Geometridae

Description

Distribution

Alberta, British Columbia

This species is distributed throughout the host range in the interior of British Columbia south of 53⁰ latitude; it also occurs in mountainous western Alberta.

Micro-habitat(s)

Scale

Damage, symptoms and biology

Digrammia setonana is a relatively uncommon innocuous solitary defoliator.

Mature larva up to 25 mm long. Twig mimic. Head, green with white patch near vertex of each lobe. Body, green, two broken thin dark green middorsal stripes, irregular white subdorsal stripe, lateral triangular white markings.

This species overwinters in either the egg or pupal stage. Larvae are present from early July to early September, pupation occurs in September, and adults emerge in September or June.

Canadian Forest Service Publications

https://cfs.nrcan.gc.ca/publications/search?q=

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)

Digrammia setonana is restricted to Rocky Mountain juniper.

Main host(s)

Rocky Mountain juniper

Photos

Dion Manastyrski Centre de foresterie du Pacifique, Victoria (Colombie-Britannique) / Pacific Forestry Centre, Victoria, British Columbia

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