Hydriomena speciosata (Packard)
Damage, symptoms and biologyHydriomena speciosata is a relatively uncommon innocuous solitary defoliator.
Mature larva up to 20 mm long. Head, brown with central and lateral black herringbone markings. Body, cream coloured overlain with dark mottling; dark middorsal + marking on dorsum of each abdominal segment.
Overwinters as a mid instar larva. Larval feeding resumes in the spring and continues until late May. Pupation occurs in May or June. Adults emerge in June, mate and lay eggs. Larvae emerge soon after and feed into the fall.
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 Hydriomena speciosata are Douglas-fir, western hemlock and lodgepole pine; other hosts include grand fir, mountain hemlock and Sitka spruce.