Whitetriangle leafroller

Distribution

Quebec, Ontario, British Columbia, Newfoundland and Labrador

This species occurs throughout British Columbia from the Skeena and Peace River drainages south; it also occurs across Canada and extends to California and Virginia.

Micro-habitat(s)

Needle

Damage, symptoms and biology

Clepsis persicana is a common innocuous solitary defoliator.

Mature larva up to 18 mm long. Head, brownish yellow with dark ocellar area and short dark dash anterolaterally. Thoracic shield, brownish yellow. Body, slender, yellowish green, with green to dark green middorsal and subdorsal stripes.

This species appears to overwinter in the egg stage. Larvae are present from April to June, pupation occurs from June to July and adults emerge from June to July.

Main host(s)

Balsam fir, balsam poplar, Douglas-fir, Engelmann spruce, European black alder, green alder, hazel alder, lodgepole pine, Manitoba maple, mountain alder, mountain maple, red alder, red maple, Rocky Mountain Douglas-fir, Siberian alder, silver maple, Sitka alder, speckled alder, subalpine fir, sugar maple, trembling aspen, white birch, white spruce, willow

Secondary host(s)

American beech, American mountain-ash, apples, black cottonwood, black spruce, choke cherry, eastern white pine, jack pine, Jack’s hybrid poplar, largetooth aspen, pin cherry, ponderosa pine, red oak, red pine, red spruce, scots pine, tamarack, western hemlock