Dion Manastyrski Centre de foresterie du Pacifique, Victoria (Colombie-Britannique) / Pacific Forestry Centre, Victoria, British Columbia

Scientific name: Argyrotaenia dorsalana (Dyar)
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Tortricidae

Distribution

British Columbia

This species occurs on the south coast and in the southern interior of British Columbia south of 51⁰ latitude; it also extends to California and Utah.

Damage, symptoms and biology

Argyrotaenia dorsalana is a common innocuous solitary defoliator.

Mature larva up to 17 mm long. Head, yellowish green with black triangular lateral marking. Body, yellowish green, dark green middorsal pin stripe; dorsum of each abdominal segment marked with two pairs of faint yellow spots.

This species appears to overwinter in the egg stage. Larvae are present from early May to mid-June; pupation occurs in late June and adults emerge soon after.