Xestia mustelina (Smith)
Damage, symptoms and biologyXestia mustelina is a common innocuous solitary defoliator.
Mature larva up to 26 mm long. Head, cream coloured with brown netting. Body brown, dorsum light brown with white middorsal and subdorsal stripes; broad yellowish white spiracular stripe.
This species overwinters in the egg stage. Larvae are present from May to mid-July; pupation occurs in July and adults emerge from July to 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 Xestia mustelina are Douglas-fir and western hemlock; other hosts include western redcedar, grand fir, amabilis fir, subalpine fir, Engelmann spruce, white spruce, Sitka spruce, western larch and mountain hemlock.