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Pine zale

Distribution

Damage, symptoms and biology

Zale duplicata is a common innocuous solitary defoliator.

Mature larva to 35 mm long. Head, mottled brown or grey with prominent white marking at vertices. Body, elongate, rusty brown (most common) to dark grey. Middorsal white to greyish white Y marking on the posterior margin of each abdominal segment. Prominent pair of tubercles on dorsum of eighth abdominal segment. First two pairs of mid-abdominal prolegs reduced in size.

This species overwinters in the pupal stage. Adults emerge in May, larvae are present June to August and pupation occurs in August.

Canadian Forest Service Publications

Pine zale

Diet and feeding behaviour

Information on host(s)

Main host(s)

Photos

Dorsal view of mature larva (rusty brown morph), on lodgepole pine
Dorso-lateral view of mature larva (rusty brown morph), on lodgepole pine
Dorso-lateral view of mature larva (grey morph), on lodgepole pin