Greenstriped webspinning sawfly
Damage, symptoms and biologyAcantholyda balanata is a relatively uncommon innocuous solitary defoliator.
Mature larva up to 18 mm long. Head, light tan with a pair of seven segmented antennae and rows of brown spots in two patches over the crown. Body, yellowish green with dark green middorsal and midventral stripes, prominent gold spiracles and a yellow subspiracular stripe. A pair of jointed appendages occur at the posterior end.
This species overwinters as a prepupal larva in earthen cells. Adults emerge in spring or early summer. Larvae construct silken webs and are active from June to July. Mature larvae drop to the soil in late July to August and construct earthen cells.
Canadian Forest Service Publications
Diet and feeding behaviour
: Feeds on the leaves of plants.
- Webworm: Spins a silk shelter in which to hide or feed.
Information on host(s)
The principal hosts of Acantholyda balanata are Sitka spruce and Engelmann spruce; other hosts include Douglas-fir, grand fir and western hemlock.
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