Scale, Annual shoot
Damage, symptoms and biologyThis species can cause economic damage in conifer nursery production.
Mature larva up to 15 mm long. Head, brownish yellow with black lateral stripe. Body, yellowish brown above the spiracular line and light creamy yellow below. Each abdominal segment marked with two pairs of faint subdorsal creamy yellow spots (pinnacula).
The orange tortrix is polyphagous.
This species appears to overwinter in the pupal stage. Larvae are present from April to May, pupation occurs from May to June and adults emerge in July. In forest nurseries, particularly in greenhouses, this species appears to be multivoltine.
Canadian Forest Service Publications
Diet and feeding behaviour
: Feeds on the leaves of plants.
- Endophytic: Lives within plant or tree tissue.
- Miner: Feeds inside the blade of a leaf, between the epidermal layers, or beneath the bark of plants, by first excavating a mine into these tissues.
Information on host(s)
Douglas-fir, western hemlock, lodgepole pine, grand fir, Sitka spruce, western redcedar, western yew, and on a broad range of hardwood and herbaceous hosts
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