- Scientific name: Pero behrensaria (Packard)
- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Insecta
- Order: Lepidoptera
- Family: Geometridae
Distribution
- Alberta
- British Columbia
Damage, symptoms and biology
Pero behrensaria is a common innocuous defoliator.Mature larva to 40 mm long. Head, tan with rust markings, vertex cleft. Body, elongate, tan to rusty brown, dorsum marked with dark broken line or a psi mark on each abdominal segment, faint yellow spiracular line.
Overwinters in the pupal stage. Adults emerge during May and June, larvae are present from June to August and pupation occurs in August.
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)
Main host(s)
- Amabilis fir
- Engelmann spruce
- Grand fir
- Rocky Mountain Douglas-fir
- Sitka spruce
- Subalpine fir
- Western hemlock
- Western larch
- Western redcedar
- White spruce
Photos
Dorso-lateral view of mature larva, on Douglas-fir
Dorso-lateral view of mature larva, on Douglas-fir