Yellowlined forest looper
Damage, symptoms and biologyThe yellowlined forest looper is a common innocuous solitary defoliator.
Mature larva to 24 mm long. Head, unmarked yellow-green. Body, light green; thin dark green middorsal stripe and a yellow subdorsal stripe; creamy yellow subspiracular stripe.
This species overwinters in the pupal stage. Adults emerge in May, larvae are present from May to July, and pupation occurs from July to August.
Life cycle (East of the Rockies)
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)
Amabilis fir, balsam fir, black spruce, Engelmann spruce, grand fir, mountain hemlock, Rocky Mountain Douglas-fir, Sitka spruce, subalpine fir, tamarack, western hemlock, western larch, western redcedar, white spruce
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