Generally distributed throughout British Columbia from the Skeena and upper Fraser drainages south.
Damage, symptoms and biology
The whitelined looper is a relatively uncommon solitary defoliator.
Mature larva up to 21 mm long. Head, unmarked green, vertex moderately cleft. Body, lime green; faint dark green middorsal pinstripe; white subdorsal stripe.
This species overwinters in the pupal stage. Adults emerge in June; larvae are present from June to mid-August, and pupation occurs in August.
Canadian Forest Service Publications
Diet and feeding behaviour
: Feeds on the leaves of plants.
- Free-living defoliator: Feeds on and moves about freely on foliage.
Information on host(s)
The principal hosts of the whitelined looper are western hemlock and Sitka spruce; other hosts include amabilis fir, subalpine fir, Engelmann spruce, white spruce, Douglas-fir, mountain hemlock and western larch.
- Date modified: